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Journal articles on the topic 'Thermal Properties of W'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Oloyede Christopher, Tunji, Bukola Akande Fatai, Olaniyi Oriola Kazeem, and Oluwatoyin Oniya Oluwole. "Thermal properties of soursop seeds and kernels." Research in Agricultural Engineering 63, No. 2 (2017): 79–85. http://dx.doi.org/10.17221/22/2016-rae.

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The thermal properties of soursop seeds and kernels were determined as a function of moisture content, ranged from 8.0 to 32.5% (d.b.). Three primary thermal properties: specific heat capacity, thermal conductivity and thermal diffusivity were determined using Dual-Needle SH-1 sensors in KD2-PRO thermal analyser. The obtained results shown that specific heat capacity of seeds and kernels increased linearly from 768 to 2,131 J/kg/K and from 1,137 to 1,438 J/kg/K, respectively. Seed thermal conductivity increased linearly from 0.075 to 0.550 W/m/K while it increased polynomially from 0.153 to 0.

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2

Garg, Sadhana, H. C. Gupta, and B. B. Tripathi. "Thermal Properties of Ta–W Alloys." Journal of the Physical Society of Japan 55, no. 2 (1986): 554–60. http://dx.doi.org/10.1143/jpsj.55.554.

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3

Sampath, A., B. G. Ravi, H. Nguyen, and T. S. Sudarshan. "Enhancing thermal properties of W/Cu composites." Powder Metallurgy 44, no. 4 (2001): 313–16. http://dx.doi.org/10.1179/pom.2001.44.4.313.

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4

Hu, Wen, Jianwei Du, Zheren Liu, Xu Sun, and Li Chen. "Structure, Mechanical and Thermal Properties of TiSiWN Coatings." Coatings 13, no. 1 (2023): 119. http://dx.doi.org/10.3390/coatings13010119.

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Elemental alloying has been proven to be a valid approach for improving the performance of coatings and has attracted significant research attention. This study aims to explore the impact of W-addition on the structure, mechanical and thermal properties of arc evaporated TiSiN coatings. Ti0.88Si0.12N coating presents a single-phase structure of fcc-(Ti, Si)N, while Ti0.88Si0.08W0.04N and Ti0.84Si0.09W0.07N coatings show a fcc-(Ti, Si, W)N and bcc-W dual-phase structure. As the W content increases, the surface quality of our coatings is obviously improved on account of the pronounced reduction

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5

Salim, Faiza M., Fadhil K. Farhan, and Abothur Almohana. "Improving the Thermal Insulating Properties of (Epoxy - Walnut Shells) Nano Composites." NeuroQuantology 20, no. 3 (2022): 330–34. http://dx.doi.org/10.14704/nq.2022.20.3.nq22286.

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In this paper, composites of epoxy resin reinforced with walnut husk powder with a granular size (80 nm) were prepared, where the resin was mixed with percentages (1- 4) % by weight. Liquid mixing method and ultrasonic dispersion technique were used for the purpose of obtaining homogeneous nano composites. Thermal insulation tests were carried out using the TCI-MATHIS thermal analysis technique. The practical results showed a significant improvement in the thermal insulation values from (4 to 10) m.K/W. Any penny more than (50%) improved.

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6

K C Yadav, K K Singh, and B L Madhyan. "Thermal Properties of Okra and Bitter Gourd." Journal of Agricultural Engineering (India) 42, no. 3 (2005): 1–5. http://dx.doi.org/10.52151/jae2005423.1129.

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Specific heat and thermal conductivity, of okra decreased linearly from 3.54 to 1.38 kJ/kgO C and 0.32 to 0.038 W/mo C, respectively, with decrease in moisture content form 88 to 12% (w.b.) The specific heat and thermal conductivity of bitter gourd decreased linearly from 3.76 to 0.95 kJ/kgOC and 0.61 to 0.07 W/mOC, respectively, with decrease in moisture content form 89 to 10% (w.b.)

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7

Bar, Goutam, and Kavita Chaudhary. "Comparison of Structural and Thermal Properties of Bauhinia Vahlii Fibre Extracted with Varied NaOH Concentrations." Textile & Leather Review 6 (April 26, 2023): 151–66. http://dx.doi.org/10.31881/tlr.2023.027.

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Plant-based natural fibres have great potential to replace synthetic materials. They come from renewable resources and are biodegradable. The physical, structural, and thermal properties of lignocellulosic fibres can be slightly modified by adopting various fibre extraction methods and chemical treatments. This research aims to compare the structural and thermal properties of Bauhinia vahlii fibres (BVFs) extracted by the different extraction processes. The Bauhinia vahlii bark was treated with 10% (w/w) and 15% (w/w) NaOH solution at 95oC for two hours, followed by mechanical and manual extra

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8

Olimov, Lutfiddin, and Islombek Khojimatov. "Thermoelectric properties of silicon oxide." E3S Web of Conferences 458 (2023): 01022. http://dx.doi.org/10.1051/e3sconf/202345801022.

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The article describes the results obtained from the study of the thermal conductivity of granulated silicon particles covered with a layer of silicon oxide. The results of the study show that the thermal conductivity of granulated silicon increases from λ ~1,12 W/mK to λ ~2,74 W/mK at T~300÷600 K, which is consistent with the results of silicon oxide (λSiO2~1 W/mK). It was also observed that the electrical conductivity changes in the range of σ~0,0038÷0,017 (Ohm·sm)-1. The results of the study were explained based on the formation of a layer of silicon oxide on the surface of granulated silico

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9

Nenuwe, O. N., and O. E. Agbalagba. "Thermal transport properties in GaAs (110)/GaAs (100) and GaAs/InAs interfaces by Reverse Non-equilibrium Molecular Dynamics." Journal of Applied Sciences and Environmental Management 23, no. 10 (2019): 1901–6. http://dx.doi.org/10.4314/jasem.v23i10.21.

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It is well known that the physics of thermal management is quite challenging as electronic device sizes are miniaturized and new materials are developed. This study calculates the thermal interface conductance (TIC), thermal interface resistance (TIR) and thermal grain conductivity across GaAs(110)/GaAs(100) and GaAs/InAs interfaces using the reverse non-equilibrium molecular dynamics (RNEMD) technique. Data obtained showed that, at GaAs(110)/GaAs(100) the TIC increased from 0.912 x 10-9 (W/K) to 1.433 x 10-9 (W/K), the TIR decreased from 1.096 x 109 (K/W) to 0.697 x 109 (K/W) between 300 K an

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10

Marackova, Lucie, Veronika Melcova, Josef Samek, and Oldrich Zmeskal. "Thermal Properties of Electro Insulating Paper." Materials Science Forum 955 (May 2019): 25–30. http://dx.doi.org/10.4028/www.scientific.net/msf.955.25.

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This paper is focused on the determination of thermal parameters (thermal conductivity, thermal diffusivity, and specific heat capacity) of electrical insulating paper from various producers. The transient step-wise method was used to determine all thermal parameters simultaneously. Evaluation was carried out using the differential method. Thermal conductivity was determined from the steady-state temperature response on thickness (corresponding to the number of paper layers), while thermal diffusivity and specific heat capacity was obtained from the dependence of derivative maximum and the cor

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11

Ai, Shu He, Yu Jun Zhang, Hong Yu Gong, and Qi Song Li. "Preparation and Thermal Properties of Pressureless Sintered AIN/SiC Composites." Key Engineering Materials 655 (July 2015): 78–81. http://dx.doi.org/10.4028/www.scientific.net/kem.655.78.

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AlN/SiC composites with 5 wt.% Y2O3addition were fabricated by pressureless sintering at 1700-1950 oC. The influences of sintering temperature and SiC content on the relative density, mechanical property and thermal conductivity were studied. With sintering temperature increasing from 1700 oC to 1750 oC, the relative density increased significantly to about 98.0%, without evident changes from 1750 oC to 1900 oC, and then decreased slightly at 1950 oC. As SiC content increased, the flexural strength of composites sintered at 1750 oC increased firstly, and then decreased, obtaining a maximum fle

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12

Lu, Dan, Ya Ran Niu, Xue Lian Ge, Xue Bing Zheng, and Guang Chen. "Fabrication and Ablation Behavior of Plasma Sprayed ZrC-W Composite Coatings." Key Engineering Materials 602-603 (March 2014): 552–55. http://dx.doi.org/10.4028/www.scientific.net/kem.602-603.552.

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In this work, atmospheric plasma spray (APS) technology was applied to fabricate ZrC-W composite coatings. The microstructure of the composite coatings was characterized. The influence of W content on the ablation-resistant and thermal shock properties of ZrC-W composite coatings was evaluated using a plasma flame. The results show that the ZrC-W composite coatings had typically lamellar microstructure, which was mainly made up of cubic ZrC, cubic W and a small amount of tetragonal ZrO2. The ZrC-W coatings had improved ablation resistant and thermal shock properties compared with those of the

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13

Bánhidi, Viktor, and László A. Gömze. "Improvement of Insulation Properties of Conventional Brick Products." Materials Science Forum 589 (June 2008): 1–6. http://dx.doi.org/10.4028/www.scientific.net/msf.589.1.

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The use of technologically byproduct agricultural wastes in various segments of the brick and tile industry is increasing continuously. The additives, mixed into the raw clay ignite during the firing process, adding extra thermal energy from inside the mixture decreasing the energy requirements of the manufacturing process. Added to this, through the combustion of the bio-wastes the porosity increases enhancing the thermal insulation properties of the final product. We have investigated some common, agricultural wastes to determine their effect on the thermal properties of bricks. In our exper

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14

Baghban, Mohammad Hajmohammadian, and Mohaddeseh Tahanpour Javadabadi. "Effect of Hydrophobic Aerogel Granules on Thermomechanical Properties of Cementitious Composites." Materials Science Forum 971 (September 2019): 114–18. http://dx.doi.org/10.4028/www.scientific.net/msf.971.114.

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Thermal conductivity is an important material property in the energy design process of the buildings. While cement-based materials are the most consumed materials in construction industry, thermal properties of these materials can play a significant role in energy efficiency of the buildings. Cementitious materials with low thermal conductivity can be desirable for using as a part of heat insulation or for thermal bridge calculations. In this study, hydrophobic aerogel granules were used as aggregate and combination of Portland cement and fly ash was considered as the binder in order to achiev

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15

Rybakov, Vladimir, Irina Ananeva, Anatoly Seliverstov, and Kseniia Usanova. "Thermal Properties of Lightweight Steel Concrete Wall Panels under Different Humidity Conditions." Materials 15, no. 9 (2022): 3193. http://dx.doi.org/10.3390/ma15093193.

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The paper presents the thermal properties of lightweight steel concrete wall panels under different humidity conditions: under normal operation conditions and high moisture of the structure. The total thermal resistance (considering thermal inhomogeneity) of the enclosing lightweight steel concrete structure with a thickness of 310 mm using monolithic low-density foam concrete (density grade of D200), at an equilibrium humidity of 5% and 8%, was experimentally established. It was equal to 4.602 m2.0C/W and 4.1 m2.0C/W, respectively. In the dry state, the total thermal resistance of this struct

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16

Muniandy, Anbuhkani, Patnarin Benyathiar, Dharmendra K. Mishra, and Ferhan Ozadali. "Dynamic Thermal Properties Estimation Using Sensitivity Coefficients for Rapid Heating Process." Foods 10, no. 8 (2021): 1954. http://dx.doi.org/10.3390/foods10081954.

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Thermal conductivity determination of food at temperatures > 100 °C still remains a challenge. The objective of this study was to determine the temperature-dependent thermal conductivity of food using rapid heating (TPCell). The experiments were designed based on scaled sensitivity coefficient (SSC), and the estimated thermal conductivity of potato puree was compared between the constant temperature heating at 121.10 °C (R12B10T1) and the rapid heating (R22B10T1). Temperature-dependent thermal conductivity models along with a constant conductivity were used for estimation. R22B10T1 experime

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17

Mohamed, Mazlan, Mohd Nazri Omar, Mohamad Shaiful Ashrul Ishak, Rozyanty Rahman, Zaiazmin Y.N, and Zairi Ismael Rizman. "Thermal Properties of the Graphene Composites: Application of Thermal Interface Materials." International Journal of Engineering & Technology 7, no. 4.33 (2018): 530. http://dx.doi.org/10.14419/ijet.v7i4.33.28169.

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Epoxy mixed with others filler for thermal interface material (TIM) had been well conducted and developed. There are problem occurs when previous material were used as matrix material likes epoxy that has non-uniform thickness of thermal interface material produce, time taken for solidification and others. Thermal pad or thermal interface material using graphene as main material to overcome the existing problem and at the same time to increase thermal conductivity and thermal contact resistance. Three types of composite graphene were used for thermal interface material in this research. The sa

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18

Olaniyi, Oriola, Hussein Babatunde, Oke Olanrewaju, and Ajetunmobi Abimbola. "Influence of moisture and temperature on the thermal properties of Jack bean seeds ('Canavalia ensiformis')." Food and Feed Research 48, no. 2 (2021): 165–74. http://dx.doi.org/10.5937/ffr48-33814.

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The thermal properties (specific heat capacity, thermal conductivity, and thermal diffusivity) of Jack bean seed (Canavalia ensiformis) were determined for designing the equipment necessary for thermal processes. These thermal properties were determined at 5, 10, 15, 20, and 25 % moisture contents and temperatures at 30, 40, and 50 º C using the KD2 Pro thermal analyzer. Results showed that the specific heat capacity ranged from 1.55 to 2.47 kJ/kgK, 1.26 to 1.84 kJ/kgK and 1.32 to 1.99 kJ/kgK; thermal conductivity 0.21 to 0.47 W/mK, 0.34 to 0.52 W/mK, and 0.26 to 0.60 W/mK and thermal diffusiv

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19

Jaskulski, Roman, Krzysztof Liszka, and Daria Jóźwiak-Niedźwiedzka. "Multifaceted Analysis of the Thermal Properties of Shielding Cement-Based Composites with Magnetite Aggregate." Materials 17, no. 12 (2024): 2936. http://dx.doi.org/10.3390/ma17122936.

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The paper presents and discusses the results of a study of the thermal properties of cement composites with different contents of magnetite aggregate (0%, 20%, 40% and 60% by volume). The effect of grain size on the evaluated thermal properties was also investigated. For this purpose, concrete containing 50% by volume of magnetite aggregate with four different fractions (1–2 mm, 2–4 mm, 4–8 mm and 8–16 mm) was used. Thermal parameters were evaluated on specimens fully saturated with water and dried to a constant mass at 65 °C. The series with varying grain sizes of magnetite achieved thermal c

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20

Abdulla, Aziz Ibrahim, Yassen Ali Salih, and Haifa Mahdi Saleh. "Properties of Ferrocement Slabs Containing Sawdust." Tikrit Journal of Engineering Sciences 20, no. 1 (2013): 51–63. http://dx.doi.org/10.25130/tjes.20.1.12.

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This research included the study of influence of sawdust addition on the properties of mortar and ferrocement slabs and study the influence of treatment sawdust on the static and dynamic properties of the Sawdust Ferrocement Slabs (SFS). In the present work, addition a different sawdust percentage ranged between (10% to 50%) of the volume of fine aggregate to cement mortar and superplasticizer was used to increase compressive strength and workability of cement mortar. The tests include, samples of cubes and prisms were tested for compressive strength and modulus of rupture and calculated the t

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21

Marciniszyn, Tomasz, and Adam Sieradzki. "Anisotropy properties of the quartzite from Jegłowa, Poland." Acta Geologica Polonica 63, no. 2 (2013): 265–69. http://dx.doi.org/10.2478/agp-2013-0011.

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Abstract Marciniszyn, T. and Sieradzki, A. 2013. Anisotropy properties of the quartzite from Jegłowa, Poland. Acta Geologica Polonica, 63 (2), 265-269. Warszawa. Results of the dielectric spectroscopy, thermal and dilatometric measurements of the quartzite rock are presented. Based on the dielectric measurements performed in a wide range of the frequency (101 - 5 ・ 107 Hz) at temperature of 300K the piezoresonance in quartzite was found. A chemical composition of quartzite was examined by XRF. The anisotropy of the thermal conductivity was observed. The thermal conductivity coefficient changes

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22

Dandapani and Devendra K. "Thermal Properties of Graphene based Polymer Nanocomposites." Indian Journal of Science and Technology 15, no. 45 (2022): 2508–14. https://doi.org/10.17485/IJST/v15i45.1824.

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Abstract <strong>Objective:</strong> Epoxy is a commonly used material for electronic components packaging, yet its inherent thermal resistance can’t meet rising demands. To improve the thermal performance of Epoxy material, the high thermal conductivity of Graphene nanoparticles interspersed into the epoxy matrix. This paper focuses on experimental results on the thermal properties of Graphene-based epoxy composite. <strong>Methods:</strong> Scanning Electron Microscopy and Energy Dispersive X-Ray Spectroscopy used for elemental analysis. Guarded Comparative Longitudinal

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23

Крамынин, Сергей Петрович. "THE SIZE DEPENDENCIES OF PROPERTIES OF MO-W ALLOY OF EQUIATOMIC COMPOSITION." Physical and Chemical Aspects of the Study of Clusters, Nanostructures and Nanomaterials, no. 12() (December 15, 2020): 128–35. http://dx.doi.org/10.26456/pcascnn/2020.12.128.

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Основываясь на параметрах парного потенциала межатомного взаимодействия Ми-Леннард-Джонса для Mo и W были рассчитаны параметры потенциала для сплава замещения Mo - W эквиатомного состава. Получены размерные зависимости для уравнения состояния, модуля упругости, коэффициента теплового расширения, изобарной теплоемкости, поверхностной энергии и производной поверхностной энергии по температуре. Также получены температурные зависимости коэффициента теплового расширения изобарной теплоемкости для макро- и нанокристаллов сплава Mo - W. Было показано, что температурная зависимость коэффициента теплов

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24

Zhang, Lian Meng, Yao Liu, Cheng Cheng Zhang, Guo Qiang Luo, Huang Liu, and Qiang Shen. "Fabrication and Properties of W-SiC_P/Cu Composites by Hot Pressing Sintering." Key Engineering Materials 697 (July 2016): 207–10. http://dx.doi.org/10.4028/www.scientific.net/kem.697.207.

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Abstract. A new ternary composite of W-SiCP/Cu(40vol%) was designed and prepared by low-temperature hot-press sintering. The micro-structural characterizations were evaluated by X-ray diffraction (XRD) and scanning electron microstructure (SEM), coefficient of thermal expansion is measured. When sintered at 950°C-100MPa-2h, the relative density of the W-SiCP/Cu composites as a function of W content all exceeded 97%. Due to the plastic deformation of Cu, higher densification W-SiCP/Cu(40vol%) composites can be achieved at a relatively low temperature. The composites are characterized by the rel

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25

Ochulor, EF, HOH Amuda, SO Adeosun, and SA Balogun. "EFFECT OF ALUMINUM DROSS AND RICE HUSK ASH ON THERMAL AND MOULDING PROPERTIES OF SILICA SAND." Nigerian Journal of Technology 36, no. 3 (2017): 794–800. http://dx.doi.org/10.4314/njt.v36i3.19.

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Moulding properties of foundry sand should be controlled so as to minimize casting defects. Its thermal characteristics are vital in defining the solidification kinetics of a cast part,Â evolving microstructure and mechanical properties. Modification of the thermal properties of the moulding sand mix is important in achieving desired structure and mechanical properties in the cast component. This study investigates the incorporation of 2-12 wt. % aluminium dross (AlDr) and 1-6 wt. % rice husk ash (RHA) in silica sand on moulding and thermal properties of the resulting sand mix. Results show th

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26

He, Lin Kai, You Hong Sun, Mei Jun Liu, and Qing Nan Meng. "Effect of the Addition of Short Carbon Fiber on Thermal Insulation Properties of ZrB₂- SiC Hot-Pressed Ceramics." Materials Science Forum 993 (May 2020): 785–90. http://dx.doi.org/10.4028/www.scientific.net/msf.993.785.

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Short carbon fibers reinforced ZrB2-SiC ceramics were prepared by hot pressing sintering process. The short carbon fibers with different volume fractions (0.2.4.6.8.10.20) were added for improving the thermal insulation properties of ZrB2-SiC ceramics. The experimental results showed that as the content of short carbon fiber increased, the thermal diffusivity decreased from 43.9m2/s to 32.9m2/s, the thermal conductivity decreased from 104.3 W/(m·K) to 72.9 W/(m·K) and thermal insulation performance reduced by 43.1%, respectively. The enhancement of the thermal insulation properties is mainly d

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27

Sunmonu, M. O., M. M. Odewole, O. A. Adeyinka, M. S. Sanusi, and S. O. Musa. "Determination of Some Selected Thermal Properties of Pumpkin Seeds (Cucurbita pepo)." Journal of Applied Sciences and Environmental Management 25, no. 4 (2021): 599–604. http://dx.doi.org/10.4314/jasem.v25i4.17.

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In this study, some selected thermal properties (specific heat, thermal conductivity and thermal diffusivity) in the moisture content range of 5.0-5.6% or green and 4.80 – 5.20% for white varieties of pumpkin seeds were determined. The specific heat was measured using mixture method while the thermal conductivity was measured by transient technique using the heat line source. The green pumpkin seed has average moisture content of 5.2% higher than moisture content of white pumpkin seed of average 4.8%. The average specific heat values of green pumpkin seed are 6.171kJ/kgK and white pumpkin seed

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28

Fóris, Ildikó, and Gábor Mucsi. "INFLUENCE OF RAW MATERIAL PROPERTIES ON WASTE-BASED GLASS FOAM." Rudarsko-geološko-naftni zbornik 38, no. 4 (2023): 75–83. http://dx.doi.org/10.17794/rgn.2023.4.7.

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Glass foam tablets were prepared by using mixed glass bottles (green, brown, and white), eggshell waste as a foaming agent, Na-bentonite as binder material, and red mud as an additive, respectively. The influence of the amount of red mud and fly ash on the properties (foaming temperature, mechanical strength, specimen density and porosity, thermal conductivity) of the tablets was studied. The foamed tablets contained 2.5 wt % binder material, 0.1 wt % foaming agent, 5 wt % fly ash, and red mud as additives in different ratios (0 – 40 wt %). After homogenization, the ground raw materials were p

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29

Cheerarot, Onanong, and Yodthong Baimark. "Thermal and Mechanical Properties of Biodegradable Star-Shaped/Linear Polylactide Stereocomplexes." Journal of Chemistry 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/206123.

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The 6-arm star-shaped poly(L-lactide) (6PLL)/linear poly(D-lactide) (1PDL) stereocomplex films were prepared by the solvent casting method. The influences of the 6PLL/1PDL blend ratios (75/25, 50/50, and 25/75 w/w) and 1PDL molecular weights (15,000, 30,000, and 60,000 g/mol) on the thermal and mechanical properties of the stereocomplex films were investigated. The 6PLL and 1PDLs had a single melting temperature (Tm) of homocrystallites at 174°C and 167°C, respectively. The 6PLL/1PDL blends had twoTms: a lowerTmof homocrystallites (160–173°C) and a higherTmof stereocomplex crystallites (219–22

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30

Sayouba, Sandwidi, Haro Kayaba, Dabilgou Téré, et al. "Formulation and Thermomechanical Characterization of Earth-based Biosourced Composites: Cases of Clay-Hibiscus cannabinus L. Fiber, Clay-sawdust and Clay- Oryza sativa Husk." Asian Journal of Physical and Chemical Sciences 11, no. 3 (2023): 30–44. http://dx.doi.org/10.9734/ajopacs/2023/v11i3204.

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This work concerns the technical study of implementation, thermal and mechanical characterization of a composite material based on clay and plant fibers, in order to meet the need for bioclimatic and sustainable houses. The objective was to find the proportions of clay and fibers to obtain a mixture that would give better thermal properties. A characterization of the thermal properties was made thanks to the KD2 Pro analyzer on samples of various formulas of mixture clay-plant fibers. The results obtained showed that the thermal properties such as thermal conductivity and thermal diffusivity o

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31

Mohamed, Mazlan, Mohd Nazri Omar, Mohamad Shaiful Ashrul Ishak, et al. "Comparison between CNT Thermal Interface Materials with Graphene Thermal Interface Material in Term of Thermal Conductivity." Materials Science Forum 1010 (September 2020): 160–65. http://dx.doi.org/10.4028/www.scientific.net/msf.1010.160.

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Thermal interface material (TIM) had been well conducted and developed by using several material as based material. A lot of combination and mixed material were used to increase thermal properties of TIM. Combination between materials for examples carbon nanotubes (CNT) and epoxy had had been used before but the significant of the studied are not exactly like predicted. In this studied, thermal interface material using graphene and CNT as main material were used to increase thermal conductivity and thermal contact resistance. These two types of TIM had been compare to each other in order to fi

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32

Wittmann, Franz, Zlatan Arnautovic, Florian Heberle, and Dieter Brüggemann. "Thermophysical Properties of Silicon Oxide Nanoparticles in Water and Ethylene Glycol–Water Dispersions." Fluids 9, no. 11 (2024): 261. http://dx.doi.org/10.3390/fluids9110261.

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Measurements of transmission as well as thermophysical properties have been carried out for different concentrations of SiO2 nanoparticles (0, 1, 2, 5, 10, and 20 wt.%) in pure water (W) and ethylene glycol–water mixture (EG/W) in a weight ratio of 25/75, from 298 to 323 K at 100 kPa. In particular, the density, specific heat capacity, and thermal diffusivity are measured by a density meter, differential scanning calorimetry, and the laser flash method. In the case of 20 wt.% SiO2, transmission in the visible range is reduced by 9.3%. Simultaneously, the density rises linearly to 12.3% (in W)

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Bian, Yanfei, SHI Jian-zhou, XIE Ming-jun, and CAI Meng. "Measurements of Aluminum-Annealed Pyrolytic Graphite Composite Baseplates with Improved Thermal Conductivity." Journal of Manufacturing Engineering 16, no. 2 (2021): 042–47. http://dx.doi.org/10.37255/jme.v16i2pp042-047.

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Annealed pyrolytic graphite (APG) is a material with thermal conductivity of about 1500 W/(m·K). This property may enable the usage of APG’s thermal potential to develop highly thermally conductive composites for devices requiring effective thermal management. In this paper, APG has been encapsulated in aluminum by brazing, and the thermal properties of Al-APG composite baseplates were measured. The results show that the thermal conductivity of the Al-APG composite baseplates is about 620 W/(m·K), which is four times higher than the pure aluminum plate (152 W/(m·K)).

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Serri, Eravan, M. Zailan Suleiman, and M. Azree Othuman Mydin. "The Effects of Oil Palm Shell Aggregate Shape on the Thermal Properties and Density of Concrete." Advanced Materials Research 935 (May 2014): 172–75. http://dx.doi.org/10.4028/www.scientific.net/amr.935.172.

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Oil Palm Shell (OPS) are one of low thermal conductivity course aggregate for lightweight concrete. This paper report on all thermal properties parameter, thermal conductivity, specific heat and thermal diffusivity. Tree mixes of OPS of air dry density 1733 to 1811 kg/m3 and oven dry density 1502 to 1632 kg/m3 were prepaid and tested for thermal properties and compared with normal concrete using crushed granite as control and conventional materials. Raw shape with air density 1733 kg/m3 showed the lowest thermal properties with thermal conductivity, specific heat and thermal diffusivity of 0.5

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Amaral, Paulo, António Correia, Luís Lopes, Paula Rebola, António Pinho, and José Carrilho Lopes. "On the Use of Thermal Properties for Characterizing Dimension Stones." Key Engineering Materials 548 (April 2013): 231–38. http://dx.doi.org/10.4028/www.scientific.net/kem.548.231.

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The use of dimension stones in architecture and civil engineering implies the knowledge of several mechanical, physical, and chemical properties. Even though it has been usual practice to measure physical and mechanical properties of dimension stones the same is not true for thermal properties such as thermal conductivity, thermal diffusivity, specific heat capacity, and heat production. These properties are particularly important when processes related with heating and cooling of buildings must be considered. Thermal conductivity, thermal diffusivity, and specific heat capacity are related wi

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Zhang, Yanbo, Yaqi Wu, Ming Yang, Gang Zhang та Haiyan Ju. "Thermal Stability and Dynamic Mechanical Properties of Poly(ε-caprolactone)/Chitosan Composite Membranes". Materials 14, № 19 (2021): 5538. http://dx.doi.org/10.3390/ma14195538.

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Poly (ε-caprolactone) (PCL) and chitosan (CS) are widely used as biodegradable and biocompatible polymers with desirable properties for tissue engineering applications. Composite membranes (CS–PCL) with various blend ratios (CS:PCL, w/w) of 0:100, 5:95, 10:90, 15:85, 20:80, and 100:0 were successfully prepared by lyophilization. The thermal stabilities of the CS–PCL membranes were systematically characterized by thermogravimetric analysis (TG), dynamic thermogravimetry (DTG), and differential scanning calorimetry (DSC). It was shown that the blend ratio of PCL and CS had a significant effect o

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Feng, Fan, Youyun Lian, Jianbao Wang, Jiupeng Song, Binyou Yan, and Xiang Liu. "Mechanical Properties and Thermal Shock Performance of High-Energy-Rate-Forged W-1%TaC Alloy." Crystals 12, no. 8 (2022): 1047. http://dx.doi.org/10.3390/cryst12081047.

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Tungsten is a metal with a high melting point and thermal conductivity, but its inherent brittleness limits its application in the industry. Dispersion strengthening and plastic deformation are considered to be an effective means to improve the properties of tungsten alloys. In this work, the mechanical properties and thermal shock performance of W-1% TaC alloy prepared by hot pressing followed by high-energy-rate forging (HERFing) and annealing treatment were investigated. The microstructure of the tungsten material was characterized via metallography, scanning electron microscopy and electro

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Phewphong, Sunti, and Tosawat Seetawan. "Thermoelectric Properties of PbTe." Advanced Materials Research 802 (September 2013): 223–26. http://dx.doi.org/10.4028/www.scientific.net/amr.802.223.

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The PbTe has been prepared by pressing and annealing method in argon atmosphere. The PbTe sample was obtained single phase and cubic structure. The Seebeck coefficient, the electrical resistivity, thermal conductivity measured by steady state method and evaluated dimensionless figure merit at room temperature. The values of Seebeck coefficient, the electrical resistivity, thermal conductivity and dimensionless figure merit are about -260 µV/K, 3 mΩcm, 0.5 W/m K and ~ 0.35 respectively at 420 K.

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Iida, Miharu, Tomoyuki Nakamura, Kenjiro Fujimoto, et al. "Thermoelectric Properties of Mg2Si1-x-yGexSbyPrepared by Spark Plasma Sintering." MRS Advances 1, no. 60 (2016): 3971–76. http://dx.doi.org/10.1557/adv.2016.332.

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ABSTRACTThe magnesium compound Mg2Si and its solid solutions are expected asn-type thermoelectric (TE) material because they are non-toxic, have a large Clarke number, and are light weight. In this study, we improved TE performance by doping Ge into Sb-doped Mg2Si to cause phonon scattering and increase carrier concentration. A bulk of Sb-doped Si-Ge alloy as the raw material was fabricated using an arc-melting method. A high-purity Mg2Si was synthesized from metal Mg and Sb-doped Si-Ge alloy using spark plasma sintering equipment. For the samples with the same Sb concentration, the electrical

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Borshchov, V. M., O. M. Listratenko, M. I. Slipchenko, et al. "Study of thermal properties of electronic modules on combined boards with polyimide dielectrics." Radiotekhnika, no. 217 (June 14, 2024): 139–47. http://dx.doi.org/10.30837/rt.2024.2.217.13.

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This article presesnts the construction and theoretical research of thermal models of electronic modules with increased power based on combined boards on aluminum bases using serial heat-welding polyimide - fluoroplastic films, including films with thermal conductivity from 0.12 to 0.46 W/m•K, as well as with the lacquer foil dielectrics with thermal conductivity of PI layers of the order of 4.0 - 4.5 W/(m•K) improved by the authors Designs and quality test structures of electronic modules were developed. Experimental studies of the efficiency of heat removal from semiconductor devices in qual

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Xu, Yu Wen, Liang Jun Liu, and Kun Jia. "Preparation and Performance Study of Thermally Conductive Silicone Adhesive Applying in Flip Chip Ball Grid Array." Key Engineering Materials 994 (November 5, 2024): 47–54. http://dx.doi.org/10.4028/p-t10ife.

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A thermally conductive silicone adhesive UB-5715 was prepared using vinyl silicone oil of medium viscosity, hydrogen-containing silicone oil and micron alumina powder. The results revealed that UB-5715 demonstrated superior thermal and mechanical properties. Specifically, its thermal decomposition temperature exceeded 400 °C, the thermal conductivity coefficient surpassed 1.80 W/m·K, the thermal resistance was under 12.0 °C·cm2/W, the shear strength reached achieved was over 5.00 MPa. Meanwhile, after being subjected to uHAST for 384 hours, thermal cycle for 1000 times and heat aging for 1000

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Li, Qingchen, Yujie Zhang, Yanlong Liu, Yan Gao, and Baoxia Deng. "Prediction of Thermal Transport Properties of Pristine and BN-Substituted Holey Graphynes." Inorganics 13, no. 4 (2025): 128. https://doi.org/10.3390/inorganics13040128.

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The merging of pore designs is a potential strategy for achieving ultra-low lattice thermal conductivity (κ), for which phonon anharmonicity and size effect are indispensable for discovering novel functional materials in thermal applications. In this study, monolayer holey graphyne (HGY) and boron nitride holey graphyne (BN-HGY) were examined for their phonon thermal transport properties through first-principles calculation and phonon Boltzmann function. HGY exhibits an intrinsic lattice thermal conductivity (κ) of 38.01 W/mK at room temperature, which exceeds BN-HGY’s 24.30 W/mK but is much l

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Peng, Jie, Yichen Qian, and David Cereceda. "A First-Principles Study of the Structural and Thermo-Mechanical Properties of Tungsten-Based Plasma-Facing Materials." Metals 14, no. 10 (2024): 1197. http://dx.doi.org/10.3390/met14101197.

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Tungsten (W) and tungsten alloys are being considered as leading candidates for structural and functional materials in future fusion energy devices. The most attractive properties of tungsten for the design of magnetic and inertial fusion energy reactors are its high melting point, high thermal conductivity, low sputtering yield, and low long-term disposal radioactive footprint. Despite these relevant features, there is a lack of understanding of how the structural and mechanical properties of W-based alloys are affected by the temperature in fusion power plants. In this work, we present a stu

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Xu, Kai, Yaning Zhang, Dong Wang, Xing Jin, and Xiang Ding. "Effect of TaC Content on Microstructure and Properties of W-TaC Composites." Materials 16, no. 1 (2022): 186. http://dx.doi.org/10.3390/ma16010186.

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Transition metal carbide reinforcement can improve the performance of pure W. W-(10–50) vol% TaC composites were prepared by spark plasma sintering at 2100 °C. The effect of TaC content on the microstructure, mechanical properties, and thermal conductivity of the composites was studied. The ablation resistance of the W-TaC composites was evaluated under an air plasma torch. The addition of TaC into the W matrix enhanced the densification of W-TaC composites, the density of W-40 vol% TaC composite exceeded 93%. TaC particles inhibited the growth of W grains during sintering. Reactive diffusion

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Pandarum, Sameshan, Yatish Ramkalawan, Konstantina V. Velkushanova, Estella Zandile Jingxi, and Katherine Maria Foxon. "Effect of storage time on the properties of faeces." Gates Open Research 3 (May 24, 2019): 1471. http://dx.doi.org/10.12688/gatesopenres.12980.1.

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Background: This short-term study was carried out in 2013 at the Pollution Research Group at the University of KwaZulu-Natal (Durban, South Africa) as an asisgnemnt of a final year Chemical engineering student project. It focussed on the effect of storage time on the properties of fresh human faeces, more particularly moisture content, thermal conductivity, volatile solids and chemical oxygen demand (COD). These properties are important as they are often used in the design of drying or thermal treatment technologies for faeces. A storage period of one week was hypothesised at room ambient temp

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Balakrishnan, S., M. Suriya, P. Tamilarasan, and S. Thanigaivel. "Impact of Nanoparticle Concentration on Thermal Properties of Nanofluids in Heat Exchangers." E3S Web of Conferences 619 (2025): 05008. https://doi.org/10.1051/e3sconf/202561905008.

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This research experimentally examined the efficacy of a shell & tube heat transfer running on nanofluids composed of copper nanoparticles with water (Cu-W) and alumina nanoparticles and water (Al2O3-W). Surface treatment of nanoparticles was omitted during the preparation of Cu-W and Al2O3-W nanofluids. Research on nanoparticles focused on how their concentration in a given volume affected coefficient of heat transfer, pressure drop, viscosity, thermal conductivity, and Nusselt number. Because of their one-of-a-kind intrinsic properties, the results demonstrated that nanofluids’ thermal co

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Lee, Gye-won, Tae-jun Park, Seonung Choi, et al. "Core-shell Structured YSZ/CeO<sub>2</sub> Composite Thermal Barrier Coating Fabrication and Properties." Korean Journal of Metals and Materials 62, no. 7 (2024): 495–502. http://dx.doi.org/10.3365/kjmm.2024.62.7.495.

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In this study, we researched changes in the properties of a Thermal Barrier Coating depending on the powder structure. For this purpose, we used YSZ (Yttria Stabilized Zirconia), a commercial Thermal Barrier Coating material, to produce a powder with a Core-Shell structure. Bulk samples were prepared by hot pressing to analyze their properties according to the powder structure, and Thermal Barrier Coating samples were prepared by APS (Atmospheric Plasma Spray) to compare differences in properties according to the powder structure. The results of the bulk sample analysis showed that the thermal

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Yoon, Hanki, Jeongseok Oh, Gonho Kim, Hyunsu Kim, Heishichiro Takahashi, and Akira Kohyama. "Microstructural analysis of W-SiCf/SiC composite." Modern Physics Letters B 29, no. 06n07 (2015): 1540017. http://dx.doi.org/10.1142/s0217984915400175.

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Continuous silicon carbide fiber-reinforced silicon carbide ( SiC f / SiC ) composites are promising structure candidates for future fusion power systems such as gas coolant fast channels, extreme high temperature reactor and fusion reactors, because of their intrinsic properties such as excellent mechanical properties, high thermal conductivity, good thermal-shock resistance as well as excellent physical and chemical stability in various environments under elevated temperature conditions. In this study, bonding of tungsten and SiC f / SiC was produced by hot-press method. Microstructure analy

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Clement, A. Komolafe, A. Akendola Frederick, J. Komolafe Omotola, and E. Essoun Edward. "Thermal and Mechanical Properties of Two Sensible Energy Storage Materials (Firebrick)." Engineering and Technology Journal 10, no. 04 (2025): 4572–77. https://doi.org/10.5281/zenodo.15301099.

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The thermal and mechanical properties of two sensible energy storage materials (Firebrick) were investigated. The properties examined were compressive strength, bulk density, porosity and thermal conductivity. The compressive strength results of the two sensible thermal storage materials (STSM) A and B were 8.82 and 9.79 MPa, respectively. The bulk density values for the STSM A and B were 1740 and 1920 kg/m<sup>3</sup>, respectively.  Also, the obtained porosity values for the STSM A and B were 77.2 and 71.5%, respectively. The STSM A and B thermal conductivity values were 1.27 and 1.76 W

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Yan, Xinxin, Wei Cao, and Haohuan Li. "Thermal Transport Properties of Na2X (X = O and S) Monolayers." Coatings 12, no. 9 (2022): 1294. http://dx.doi.org/10.3390/coatings12091294.

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Motivated by the excellent functional thin film devices made from two-dimensional materials, we investigated the thermal transport properties of Na2X (X = O and S) monolayers using first-principle calculations. The thermal conductivity at room temperature was 1.055 W/mK and 1.822 W/mK for the Na2O monolayers and Na2S monolayers, respectively. The high thermal conductivity for the Na2S monolayers is mainly contributed to by in-plane transverse acoustic (TA) phonons. The group velocity for the Na2S monolayers exhibits lower group velocity and a larger phonon relaxation time than the Na2O monolay

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