Log in

Relevant bibliographies by topics / Silica particle / Journal articles

To see the other types of publications on this topic, follow the link: Silica particle.

Journal articles on the topic 'Silica particle'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Silica particle.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Wang, Shu Lin, Zhao Wang, Bing Hao Li, and Man Xu. "Preparation of Spherical Silica with Controllable Size." Solid State Phenomena 281 (August 2018): 65–70. http://dx.doi.org/10.4028/www.scientific.net/ssp.281.65.

Full text

Abstract:

The spherical silica particles were prepared by sol-gel method with TEOS as precursor, ethanol as solvent in the presence of ammonia. The effects of reaction temperature and the amount of ammonia and TEOS on the size and morphology of silica particles were investigated. The hydrolysis temperature , alkali and TEOS content does not affect the morphology of silica, the silica particles were spherical; With the increase of hydrolysis temperature, particle size of silica showed first increased and then decreased, when the hydrolysis temperature is 30 °C, the silica particle size up to 0.6 μm, when

APA, Harvard, Vancouver, ISO, and other styles

2

Gilberti, Renée M., and David A. Knecht. "Macrophages phagocytose nonopsonized silica particles using a unique microtubule-dependent pathway." Molecular Biology of the Cell 26, no. 3 (2015): 518–29. http://dx.doi.org/10.1091/mbc.e14-08-1301.

Full text

Abstract:

Silica inhalation leads to the development of the chronic lung disease silicosis. Macrophages are killed by uptake of nonopsonized silica particles, and this is believed to play a critical role in the etiology of silicosis. However, the mechanism of nonopsonized-particle uptake is not well understood. We compared the molecular events associated with nonopsonized- and opsonized-particle phagocytosis. Both Rac and RhoA GTPases are activated upon nonopsonized-particle exposure, whereas opsonized particles activate either Rac or RhoA. All types of particles quickly generate a PI(3,4,5)P3 and F-act

APA, Harvard, Vancouver, ISO, and other styles

3

Ueno, Kyohei, Hideyuki Negishi, Takuya Okuno, et al. "Effects of Silica-Particle Coating on a Silica Support for the Fabrication of High-Performance Silicalite-1 Membranes by Gel-Free Steam-Assisted Conversion." Membranes 9, no. 4 (2019): 46. http://dx.doi.org/10.3390/membranes9040046.

Full text

Abstract:

Silicalite-1 membranes with high pervaporation performance were prepared successfully on a silica-particle-coated tubular silica support using a gel-free steam-assisted conversion (SAC) method. The effects of the silica-particle layer formed on the top surface of the silica support and the physical properties of the silica particles themselves on the membrane-formation process were investigated. The silica particles coated served as the additional silica source for growing the silicalite-1 seed crystal layer into the silicalite-1 membrane. As a result, it was possible to form a dense and conti

APA, Harvard, Vancouver, ISO, and other styles

4

Xu, Xue Feng, H. F. Chen, H. T. Ma, B. X. Ma, and Wei Peng. "The Mechanism of Polymer Particles in Silicon Wafer CMP." Materials Science Forum 626-627 (August 2009): 231–36. http://dx.doi.org/10.4028/www.scientific.net/msf.626-627.231.

Full text

Abstract:

In order to increase the material removal rate of silicon wafer, composite abrasives slurry was used in CMP. Zeta potential of polymer particle was measured and interaction potential energy between silica abrasives and polymer particles in slurry were analyzed and calculated. Adsorptions between silica abrasives and polymer particles were observed with TEM. CMP experiments had been taken to analyze the effects of polishing parameters (the concentration of colloidal silica and polymer particle, the pressure and the speed of polishing) on the material removal rate. The mechanism of polymer parti

APA, Harvard, Vancouver, ISO, and other styles

5

Schneider, Gerald J., W. Hengl, K. Brandt, S. V. Roth, R. Schuster, and D. Göritz. "Influence of the matrix on the fractal properties of precipitated silica in composites." Journal of Applied Crystallography 45, no. 3 (2012): 430–38. http://dx.doi.org/10.1107/s0021889812008631.

Full text

Abstract:

The influence of different interactions between polymer chains and the particle surface on the morphology of hierarchically structured silica were studied by means of small-angle X-ray scattering experiments and a thorough analysis. To realize different interaction strengths, the particles were dispersed in natural and nitrile rubber,i.e. matrices having different polarities. Changing the silica fraction renders the respective influences of particle–particle, cluster–cluster and polymer–particle interactions accessible. Thus, the interplay between external mechanical forces from the mixer, int

APA, Harvard, Vancouver, ISO, and other styles

6

Yin, Cong Cong, Hong Bin Qi, Xiao Chao Chen, and Zhi Hui Wang. "Preparation of Silica Nanoparticles Using Silica-Rich Filtrate from Potassium-Rich Rock." Advanced Materials Research 160-162 (November 2010): 1372–77. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.1372.

Full text

Abstract:

The silicon-rich filtrate which was obtained from the desilication solution of potassium-rich rock was used as raw materials to prepare nanometer sillica and ultrasonic dispersion method was applied to the chemical precipitation process. A detailed study was carried out on the effect of filtrate concentration, surfactant dosage, reaction temperature, calcinations temperature, ultrasonic dispersion on size of silica nanoparticles. The basic properties and size of particles were characterized by means of FE-SEM, TEM, XRD, TGA and FTIR. The results obtained in the study indicated that monodispers

APA, Harvard, Vancouver, ISO, and other styles

7

RAMOS, Vanessa Machado Babinski, Maurício Gammertt RÖHNELT, and Rodrigo BRAMBILLA. "HDPE/SILICA COMPOSITES-PART II: EFFECT OF SILICA PARTICLE SIZE AND SILICA MODIFICATION ON THE THERMAL AND MECHANICAL PROPERTIES." Periódico Tchê Química 16, no. 32 (2019): 287–305. http://dx.doi.org/10.52571/ptq.v16.n32.2019.305_periodico32_pgs_287_305.pdf.

Full text

Abstract:

In this work, the effect of silica particle size and organosilane type used in the silica organofunctionalization on the thermal and mechanical properties of high-density polyethylene (HDPE)/silica composites were evaluated. HDPE/silica composites were prepared by the extrusion method using two types of silica: fumed silica, with nanometric particle size and silica gel, micrometric, modified with organosilanes containing methyl or octyl functional groups. Silicas were added to the HDPE at 1% v/v concentration. The addition of the silicas to the HDPE did not influence the melt (Tm) and the crys

APA, Harvard, Vancouver, ISO, and other styles

8

Kwan, Kermit S., Daniel A. Harrington, Patricia A. Moore, James R. Hahn, Jon V. Degroot, and Gary T. Burns. "Synthesis and Use of Colloidal Silica for Reinforcement in Silicone Elastomers." Rubber Chemistry and Technology 74, no. 4 (2001): 630–44. http://dx.doi.org/10.5254/1.3544963.

Full text

Abstract:

Abstract Aqueous suspensions of colloidal silicas are readily silylated with either chlorosilanes or disiloxanes in the presence of acid and isopropyl alcohol without aggregation of the silica particle. By using a mixture of chlorosilanes or disiloxanes, spherical nanoparticles with controlled functionality can be made and transferred to an organic phase to provide stable, water free suspensions. The hydrophobic silica particles readily disperse into silicone polymers. At sufficient loading levels, they provide mechanical reinforcement comparable to traditional fillers but with improved clarit

APA, Harvard, Vancouver, ISO, and other styles

9

Xu, Jianxin, Xiuli Sang, Hua Wang, and Yunying Fan. "An Assessment of the Effects of Micron-Particle Aggregation on the Performance of Zinc-Silica Composite Coatings Using Betti Numbers." Advances in Materials Science and Engineering 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/787068.

Full text

Abstract:

This paper investigates the assessment of the mixing effect of zinc-silica composite electrolyte using particle image velocimetry (PIV). In particular, we considered the deposition of silica particles using a stirring tank, which provides strong evidence for characterizing the mixing effects of flow field. A method to extract meaningful parameters to evaluate particle distribution from digital images recorded by the PIV technique during the electrodeposition process is applied. The Betti numbers of binary images of silica particles mixing were calculated using the CHomP software, which was use

APA, Harvard, Vancouver, ISO, and other styles

10

Suzuki, Kazuya, Takeshi Yumura, Yuko Tanaka, and Mitsuru Akashi. "pH-Responsive Model Drug Release from Silica-Poly(methacrylic acid) Interpenetrating Gel Hybrids." Journal of Bioactive and Compatible Polymers 16, no. 5 (2001): 409–18. http://dx.doi.org/10.1106/1h3c-hn3r-ykua-2b29.

Full text

Abstract:

Stimuli-responsive gel was hybridized with porous silica particles, by radical polymerization of methacrylic acid (MA) in the presence of a crosslinker. Brilliant Blue FCF (BBFCF) was encapsulated in the core of the particle and its release behavior from the particle under specific stimuli was studied. PMA gel hybridized silica particles showed specific release behavior at different pH values while normal silica particles released BBFCF at the same rate at all pHs.

APA, Harvard, Vancouver, ISO, and other styles

11

Kwon, Soon Chul, Tadaharu Adachi, Wakako Araki, and Akihiko Yamaji. "Effect of Particle Size on Fracture Toughness of Spherical-Silica Particle Filled Epoxy Composites." Key Engineering Materials 297-300 (November 2005): 207–12. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.207.

Full text

Abstract:

We investigated the particle size effects on the fracture toughness of epoxy resin composites reinforced with spherical-silica particles. The silica particles had different mean particle diameters of between 1.56 and 0.24µm and were filled with bisphenol A-type epoxy resin under different mixture ratios of small and large particles and a constant volume fraction for all particles of 0.30. As the content with the added smaller particle increased, the viscosity of each composite before curing remarkably increased. We conducted the single edge notched bending test (SENB) to measure the mode I fra

APA, Harvard, Vancouver, ISO, and other styles

12

Yano, Kazuhisa, Tadashi Nakamura, Hiroshi Nozaki, Noritomo Suzuki, and Yuusuke Akimoto. "Synthesis of Highly Monodispersed Core/Shell Mesoporous Silica Spheres." Advances in Science and Technology 45 (October 2006): 814–18. http://dx.doi.org/10.4028/www.scientific.net/ast.45.814.

Full text

Abstract:

Particle size development of monodispersed mesoporous silica spheres (MMSS) was investigated by laser scattering measurement, TEM and XRD in situ. Smaller particles suddenly appeared after the commencement of the experiment, then growing homogeneously to larger particles. It is assumed that residual silica precursors in solution preferentially reacted with existing particle surface silanol, preventing generation of new particles. This leads to the formation of monodispersed particles. Based on the mechanism, monodispersed mesoporous silica spheres with core/shell structure have been newly synt

APA, Harvard, Vancouver, ISO, and other styles

13

Fairus, Sirin, H. Haryono, Mas H. Sugita, and Agus Sudrajat. "Proses pembuatan waterglass dari pasir silika dengan pelebur natrium hidroksida." Jurnal Teknik Kimia Indonesia 8, no. 2 (2018): 56. http://dx.doi.org/10.5614/jtki.2009.8.2.4.

Full text

Abstract:

Waterglass from silica sand production process with buster sodium hydroxideWaterglass may be prepared by the fusion process of silica sand using alkali. Waterglass component, which mainly contains SiO2 and Na2O, have various applications depending on their composition. Waterglass is usually used in the soap and detergent, paper, textile, and ceramic industries, in the cleaning of metals, the manufacture of silica gel, and others. This research was done to study the effect of silica sand particle size and the quantity of NaOH as fluxing agent on the yield and SiO2 content of waterglass produced

APA, Harvard, Vancouver, ISO, and other styles

14

Li, Joshua Qing Song, Yan Qiu Wang, and Hai Wang. "Preparation and Characterization of Silica/Polymer Hybrid Submicron Particles via a Semi-Continuous Soap-Free Emulsion Polymerization." Advanced Materials Research 1120-1121 (July 2015): 225–32. http://dx.doi.org/10.4028/www.scientific.net/amr.1120-1121.225.

Full text

Abstract:

Submicron hybrid particles were prepared by direct polymerization of three monomers of styrene, methyl methacrylate (MMA), and vinyl acetate (VAC) onto the hydrophilic surface of 230 nm silica submicron particles without any coupling agent in a semi-continuous emulsifier-free emulsion polymerization at a monomer starved condition. The polymerization was initiated by potassium persulfate with constant monomer feed at 0.01, 0.02, or 0.04 mL/min, after adding 230 nm silica seed particles. The particle growth was investigated with a laser particle size analyzer and SEM, and the particle surfaces b

APA, Harvard, Vancouver, ISO, and other styles

15

Hwang, Ha Soo, Duck Soo Yuk, So Hee Ko, and In Park. "Synthesis of Superhydrophobic Raspberry-Like Polymethylmethacrylate/Silica Core/Shell Particles." Advanced Materials Research 93-94 (January 2010): 27–30. http://dx.doi.org/10.4028/www.scientific.net/amr.93-94.27.

Full text

Abstract:

Silica-coated raspberry-like polymeric particles were synthesized based on the cationic colloidal particles which were prepared by soap-free emulsion polymerization of methylmethacrylate (MMA) in the presence of a cationic monomer, methacryloxyethyltrimethyl ammonium chloride (MOTAC) using azobis(isobutylamidine)hydrochloride (AIBA) as an initiator. The Stöber method has been adopted to coat silica on the surface of these cationic particles. Negatively charged Silica precursors were rapidly hydrolyzed onto the cationic surfaces of colloidal particles. The resulted polymethylmethacrylate-silica

APA, Harvard, Vancouver, ISO, and other styles

16

Papadopoulou, Anastasia, Jurriaan J. J. Gillissen, Manish K. Tiwari, and Stavroula Balabani. "Effect of Particle Specific Surface Area on the Rheology of Non-Brownian Silica Suspensions." Materials 13, no. 20 (2020): 4628. http://dx.doi.org/10.3390/ma13204628.

Full text

Abstract:

Industrial formulations very often involve particles with a broad range of surface characteristics and size distributions. Particle surface asperities (roughness) and porosity increase particle specific surface area and significantly alter suspension rheology, which can be detrimental to the quality of the end product. We examine the rheological properties of two types of non-Brownian, commercial precipitated silicas, with varying specific surface area, namely PS52 and PS226, suspended in a non-aqueous solvent, glycerol, and compare them against those of glass sphere suspensions (GS2) with a s

APA, Harvard, Vancouver, ISO, and other styles

17

Xu, Yuehong. "Particle size analyses of porous silica and hybrid silica chromatographic support particles." Journal of Chromatography A 1191, no. 1-2 (2008): 40–56. http://dx.doi.org/10.1016/j.chroma.2008.01.051.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Zhang, He, Jun Fang Wei, and Fang Zhu. "Preparation of Large Monodispersed Spherical Silica Particles Using Stöber Method." Advanced Materials Research 647 (January 2013): 722–25. http://dx.doi.org/10.4028/www.scientific.net/amr.647.722.

Full text

Abstract:

To obtain large-sized, monodispersed spherical particles of silica by Sol-Gel, the classic Stöber method was optimized. Effects of the type of solvents，reaction temperature and reaction time on the particle sizes and the particle diameter distribution of silicon dioxide were investigated by scanning electron microscopy (SEM). The results show that the monodisperse silicon dioxide spherical particles with 1.0μm diameter could be obtained in isopropanol solvent under a suitable reaction condition. When the reaction temperature is increased, the silica particle size will decrease. The particle si

APA, Harvard, Vancouver, ISO, and other styles

19

Susnik, Eva, Patricia Taladriz-Blanco, Barbara Drasler, Sandor Balog, Alke Petri-Fink, and Barbara Rothen-Rutishauser. "Increased Uptake of Silica Nanoparticles in Inflamed Macrophages but Not upon Co-Exposure to Micron-Sized Particles." Cells 9, no. 9 (2020): 2099. http://dx.doi.org/10.3390/cells9092099.

Full text

Abstract:

Silica nanoparticles (NPs) are widely used in various industrial and biomedical applications. Little is known about the cellular uptake of co-exposed silica particles, as can be expected in our daily life. In addition, an inflamed microenvironment might affect a NP’s uptake and a cell’s physiological response. Herein, prestimulated mouse J774A.1 macrophages with bacterial lipopolysaccharide were post-exposed to micron- and nanosized silica particles, either alone or together, i.e., simultaneously or sequentially, for different time points. The results indicated a morphological change and incre

APA, Harvard, Vancouver, ISO, and other styles

20

Stakić, Milan, Slobodan Milonjić, Vladeta Pavasović, and Zoja Ilić. "Ultrafiltration of silica sols." Collection of Czechoslovak Chemical Communications 54, no. 1 (1989): 91–101. http://dx.doi.org/10.1135/cccc19890091.

Full text

Abstract:

Ultrafiltration of three laboratory made silica and two commercial silica sols was studied using Amicon YC membrane in a 200 ml capacity batch-cell. The effect of silica particle size, stirring conditions, pressure, pH and silica contents on ultrafiltration was investigated. The results obtained indicate that the smaller particles have, disregarding the stirring conditions, lower filtration flux. The differences observed in filtration flux are more pronounced in the conditions without stirring. The obtained value of the membrane resistance is independent of the conditions investigated (stirrin

APA, Harvard, Vancouver, ISO, and other styles

21

Bogush, G. H., and C. F. Zukoski. "Studies of silica sphere growth." Proceedings, annual meeting, Electron Microscopy Society of America 44 (August 1986): 846–47. http://dx.doi.org/10.1017/s0424820100145571.

Full text

Abstract:

Recipes are available for the preparation of monodisperse oxide powders and these materials are seeing increased use in the preparation of low flaw density ceramics. Despite the growing demand for these single sized powders, little is known about the physico-chemical processes which determine particle morphology. Here we report on studies of the mechanisms of particle growth.As a model system we choose silica spheres prepared through the hydrolysis of silica alkoxides in basic alcoholic solutions. The rates of particle growth were studied by dipping carbon sputtered formvar coated electron mic

APA, Harvard, Vancouver, ISO, and other styles

22

Li, Ning, Jinfu Ding, Liguang Hu, Xiao Wang, Lirong Lu, and Jianmeng Huang. "Preparation, Microstructure and Compressive Properties of Silicone GEL/SiC Composites for Elastic Abrasive." Advanced Composites Letters 27, no. 3 (2018): 096369351802700. http://dx.doi.org/10.1177/096369351802700305.

Full text

Abstract:

An elastic abrasive tool based on micropore silica gel was designed and reinforced with silicon carbide (SiC) particle. The abrasive internal structure presents porous chain network structure, and the enhanced particles uniformly distributed in the matrix. The compression performance of modified composites is nonlinear increasing. The experimental results show that the accumulating energy of the self microporous structure is easy to overcome the internal friction in a certain deformation quantity of the materials. When the deformation quantity is large enough, the microporous structure and the

APA, Harvard, Vancouver, ISO, and other styles

23

Shim, V. P. W., Y. B. Guo, H. W. Gu, and Xu Li. "Response of Silica-Nylon6 Nanocomposites to Static and Dynamic Loading." Materials Science Forum 706-709 (January 2012): 786–92. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.786.

Full text

Abstract:

Silica-nylon6 composites were fabricated using two types of silica nanoparticle fillers with different surface modifications. Type A particles (treated with hexamethyldisilazane) were uniformly dispersed but only displayed weak long-range interaction with the nylon6 matrix; in contrast, type B particles (modified with 3-aminopropyltriethoxysilane) formed covalent bonds with the nylon6 chains but their dispersion is not good. The silica-nylon6 composites synthesized were subjected to quasi-static and dynamic tension to study the effects of strain rate and nanoparticle fraction. Results show tha

APA, Harvard, Vancouver, ISO, and other styles

24

Zhang, Yong, Xuening Fei, Lu Yu, Lingyun Cao, and Baolian Zhang. "Preparation and characterisation of silica supported organic hybrid pigments." Pigment & Resin Technology 43, no. 6 (2014): 325–31. http://dx.doi.org/10.1108/prt-10-2013-0087.

Full text

Abstract:

Purpose The purpose of the work reported in this paper is to prepare hybrid pigments fabricated by depositing pigment yellow 12 (PY12) on the surface of silica gel to improve the application performance of the resulting pigments. The particle size distribution, optical properties, thermal stability, water dispersibility and flowability of the pigments with and without silica gel modification were studied. Design/methodology/approach The hybrid pigments were synthesised with different amount of silica gel. The modified pigments were characterised by Fourier transforms infrared spectroscopy, X-r

APA, Harvard, Vancouver, ISO, and other styles

25

BELZA, TOMAS, VLADIMIR PAVLINEK, IVO KURITKA, PETR SAHA, and OTAKAR QUADRAT. "ELECTRORHEOLOGICAL AND DIELECTRIC PROPERTIES OF UREA/SIO2 NANOCOMPOSITE SUSPENSIONS MODIFIED BY N, N-DIMETHYLFORMAMIDE." International Journal of Modern Physics B 21, no. 28n29 (2007): 4782–89. http://dx.doi.org/10.1142/s0217979207045669.

Full text

Abstract:

In this study, electrorheological (ER) behaviour of silica nanocomposite suspensions treated with urea and N , N – dimethylformamide (DMF) in DC electric field has been investigated. While the ER effect of the neat silica itself was very low, the modification of silica nanoparticles improved compatibility of the solid and liquid phase and increased considerably ER activity of the system. In contrast to maximum possible concentration about 5 wt.% of neat silica due to particle aggregation 20 wt.% suspension of treated particles with low field-off viscosity could be prepared. The dielectric meas

APA, Harvard, Vancouver, ISO, and other styles

26

Vaikuntam, Sankar Raman, Eshwaran Subramani Bhagavatheswaran, Fei Xiang, et al. "Friction, Abrasion and Crack Growth Behavior of In-Situ and Ex-Situ Silica Filled Rubber Composites." Materials 13, no. 2 (2020): 270. http://dx.doi.org/10.3390/ma13020270.

Full text

Abstract:

The article focuses on comparing the friction, abrasion, and crack growth behavior of two different kinds of silica-filled tire tread compounds loaded with (a) in-situ generated alkoxide silica and (b) commercial precipitated silica-filled compounds. The rubber matrix consists of solution styrene butadiene rubber polymers (SSBR). The in-situ generated particles are entirely different in filler morphology, i.e., in terms of size and physical structure, when compared to the precipitated silica. However, both types of the silicas were identified as amorphous in nature. Influence of filler morphol

APA, Harvard, Vancouver, ISO, and other styles

27

Teleki, A., S. E. Pratsinis, K. Wegner, R. Jossen, and F. Krumeich. "Flame-coating of titania particles with silica." Journal of Materials Research 20, no. 5 (2005): 1336–47. http://dx.doi.org/10.1557/jmr.2005.0160.

Full text

Abstract:

Silica/titania composite particles were prepared by co-oxidation of titanium-tetra-isopropoxide and hexamethyldisiloxane in a co-flow diffusion flame reactor. The influence of precursor composition on product powder characteristics was studied by x-ray diffraction, nitrogen adsorption, electron microscopy, elemental mapping, and energy-dispersive x-ray analysis. The flame temperature was measured by Fourier transform infrared spectroscopy. The evolution of composite particle morphology from ramified agglomerates to spot- or fully coated particles was investigated by thermophoretic sampling and

APA, Harvard, Vancouver, ISO, and other styles

28

Chen, Li Ya, Ji Fang Fu, Wen Qi Yu, et al. "Enhanced Thermal and Mechanical Properties of Epoxy Composites by Spherical Silica with Different Size." Key Engineering Materials 727 (January 2017): 519–26. http://dx.doi.org/10.4028/www.scientific.net/kem.727.519.

Full text

Abstract:

Spherical silica particles with mean diameter 350 nm, 500 nm and 1000 nm were used to modify o-cresol-novolac epoxy resin (ECN) at a ranging constant weight fraction from 0 to 20 wt%. The effects of particle size and fillers content on the impact strength, flexural modulus, dynamic mechanical analysis (DMA), coefficient of thermal expansion (CTE), dielectric properties and bulk resistivities of epoxy composites filled with spherical silica particles were investigated. The results revealed that the impact strength and flexural modulus showed significant improvements with the addition of spheric

APA, Harvard, Vancouver, ISO, and other styles

29

Olijnyk, Liliana, Volodymyr Starchevski, and Volodymyr Kyslenko. "Mathematical model of rheological behavior of silica suspension in hydroxypropyl methyl cellulose solution." Chemistry & Chemical Technology 1, no. 3 (2007): 121–25. http://dx.doi.org/10.23939/chcht01.03.121.

Full text

Abstract:

A mathematical model of rheological behavior of silica suspension in hydroxypropyl methyl cellulose solution was investigated. The model takes into account the friction between particle aggregates, particle aggregates and macromolecules in solution and between macromolecules in solution as well as the formation of well ordered layers contained solid particles, adsorbed macromolecules and macromolecules in the holes between particles in aggregates at the large shear rates. Suggested model allows to describe the rheological behavior of silica suspensions in water solution of hydroxypropyl methyl

APA, Harvard, Vancouver, ISO, and other styles

30

Hong, Yi Koan, Young Jae Kang, Jin Goo Park, et al. "Adhesion and Removal of Silica and Ceria Particles on the Wafer Surfaces in STI and Poly Si CMP." Solid State Phenomena 134 (November 2007): 159–63. http://dx.doi.org/10.4028/www.scientific.net/ssp.134.159.

Full text

Abstract:

The purpose of this study is to investigate the effects of slurry pH on the adhesion and removal of silica and ceria abrasive particles on the poly Si, TEOS, SiN and SAC (self aligned memory cell contact) and STI (shallow trench isolation) patterned wafer surfaces. The adhesion force of silica and ceria particles were theoretically and experimentally investigated in STI and poly Si CMP process. A stronger adhesion force was observed for silica particles on the poly Si wafer in acidic rather than in alkaline solutions. The adhesion force of ceria particle was lower than that of silica in invest

APA, Harvard, Vancouver, ISO, and other styles

31

Kawakita, Hidetaka, Kaori Yokoyama, Shohei Esaki, Shintaro Morisada, and Keisuke Ohto. "Separation of Colloidal Particle Using Elastic-Gel-Packed Column." MATEC Web of Conferences 333 (2021): 04003. http://dx.doi.org/10.1051/matecconf/202133304003.

Full text

Abstract:

Polymerized spherical gel (46 μm) was packed in a column to permeate silica particle suspension for the separation due to their differences of sizes. The elastic gel in the bottom domain of column deformed more because the pressure of the fluid flow suppressed the packed gel layer, that is, the formed gaps among the gels at the bottom domain had the smaller ‘pore’, resulting in filtering the smaller-size of the particles at the bottom of the column. The larger the size of silica particle, the upper the filtered domain in the column. To elute the filtered silica particle, the gel layer was comp

APA, Harvard, Vancouver, ISO, and other styles

32

Kawakita, Hidetaka, Kaori Yokoyama, Shohei Esaki, Shintaro Morisada, and Keisuke Ohto. "Separation of Colloidal Particle Using Elastic-Gel-Packed Column." MATEC Web of Conferences 333 (2021): 04003. http://dx.doi.org/10.1051/matecconf/202133304003.

Full text

Abstract:

Polymerized spherical gel (46 μm) was packed in a column to permeate silica particle suspension for the separation due to their differences of sizes. The elastic gel in the bottom domain of column deformed more because the pressure of the fluid flow suppressed the packed gel layer, that is, the formed gaps among the gels at the bottom domain had the smaller ‘pore’, resulting in filtering the smaller-size of the particles at the bottom of the column. The larger the size of silica particle, the upper the filtered domain in the column. To elute the filtered silica particle, the gel layer was comp

APA, Harvard, Vancouver, ISO, and other styles

33

Tsukada, Satoru, Yuki Nakanishi, Takashi Hamada, Kenta Okada, Susumu Mineoi, and Joji Ohshita. "Ethylene-bridged polysilsesquioxane/hollow silica particle hybrid film for thermal insulation material." RSC Advances 11, no. 40 (2021): 24968–75. http://dx.doi.org/10.1039/d1ra04301c.

Full text

Abstract:

Ethylene-bridged polysilsesquioxane/hollow silica particle hybrid films were prepared by the sol–gel reaction. The hybrid film containing hollow silica particles exhibited good thermal insulation properties and thermal stability.

APA, Harvard, Vancouver, ISO, and other styles

34

HERMANN, A., E. A. LANGARO, S. H. LOPES DA SILVA, and N. S. KLEIN. "Particle packing of cement and silica fume in pastes using an analytical model." Revista IBRACON de Estruturas e Materiais 9, no. 1 (2016): 48–65. http://dx.doi.org/10.1590/s1983-41952016000100004.

Full text

Abstract:

When added to concrete in appropriate content, silica fume may provide an increase in the mechanical strength of the material due to its high pozzolanic reactivity. In addition to the chemical contribution, physical changes can also be observed in concretes with silica fume due to an improvement in the particle packing of the paste. This is a result of their small size spherical particles, which fill the voids between the larger cement grains. However, it is necessary to properly establish the cement replacement content by silica fume, because at high amounts, which exceed the volume of voids

APA, Harvard, Vancouver, ISO, and other styles

35

Huang, Tsao Cheng, Jui Ming Yeh, and Jen Chang Yang. "Effect of Silica Size on the Thermal, Mechanical and Biodegradable Properties of Polylactide/Silica Composite Material Prepared by Melt Blending." Advanced Materials Research 123-125 (August 2010): 1215–18. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.1215.

Full text

Abstract:

In this study, we attempt to investigate the effect of silica size on the thermal, mechanical and biodegradable properties of polylactide/amino-silica (PLA/SiO2) composite material, by preparing the PLA/ SiO2 hybrids containing different size of silica particle through twin-screw extruder. First of all, we prepared amino-functionalized silica particles through performing the conventional base-catalyzed sol-gel reaction of methyltrimethoxysilane (MTMS) and 3-aminopropyltrimethoxysilane (APTMS). The average diameter of silica particle employed in hybrids was 150 nm (S-silica) and 1μm (B-silica),

APA, Harvard, Vancouver, ISO, and other styles

36

Xu, Xue Feng, H. T. Ma, B. X. Ma, and Wei Peng. "Experimental Study on Parameter Optimization of Silicon Wafer CMP Using Composite Abrasives Slurry." Advanced Materials Research 69-70 (May 2009): 214–18. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.214.

Full text

Abstract:

In order to increase the material removal rate of silicon wafer, composite abrasives slurry was used in CMP. The mechanism of interaction between silica abrasives and polymer particles was analyzed. Small silica abrasives were seen to attach onto the surface of the polymer particles. Composite abrasives slurry was obtained by adding polymer particles into single abrasive slurry. Three key parameters, the concentration of colloidal silica, the concentration of polymer particle and the speed of polishing, which influence the material removal rate of silicon wafer were analyzed by Taguchi method

APA, Harvard, Vancouver, ISO, and other styles

37

Jayaprakash, Murugesan, Yukio Miyashita, Yuichi Otsuka, Yoshiharu Mutoh, and Kohsoku Nagata. "OS0805 Fretting Fatigue Behavior of Silica Particle Reinforced Epoxy Composite." Proceedings of the Materials and Mechanics Conference 2011 (2011): _OS0805–1_—_OS0805–3_. http://dx.doi.org/10.1299/jsmemm.2011._os0805-1_.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Li, Qun Yan, Wei Min Gao, Yun Fa Chen, Peng Dong, and Zhen Jiang Wu. "Fabrication of Silica Colloidal Crystal Multilayer with Controlled Thicknesses by Vertical Deposition." Key Engineering Materials 280-283 (February 2007): 1149–52. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.1149.

Full text

Abstract:

The silica colloidal crystal multilayers were deposited from ethanol suspensions with different particle concentrations by vertical deposition method. The microstructures and thicknesses of silica colloidal multilayers were characterized by scanning electron micrography. The thicknesses of colloidal crystal multilayers increased with the particle concentration increasing within a certain range of particles concentrations. When the particle concentration exceeded 2.48wt%, the thicknesses of colloidal crystal multilayers didn’t increased with the concentration increasing. Colloidal crystal multi

APA, Harvard, Vancouver, ISO, and other styles

39

Aghababazadeh, R., S. Tabatabae, Ali Shokuhfar, and A. R. Mirhabibi. "Synthesis and Characterization of Silica Nanoparticles." Solid State Phenomena 121-123 (March 2007): 49–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.49.

Full text

Abstract:

Currently there are several models discussed to describe the formation of monodispersed silica particles. Monodisperse colloidal silica was prepared from tetraethoxysilane in mixture of ammonia, water and ethanol. Chemical system reaction permits the controlled growth of silica nanoparticles and subsequent condition of silicic acid in alcoholic solution. The molar ratio of NH4OH, C2H5OH and H2O has a significant effect on particle size and specific surface area of silica particles. The nature of particles was evaluated using X-ray diffraction, energy dispersive spectroscopy (EDS) and BET. The

APA, Harvard, Vancouver, ISO, and other styles

40

Arnoldussen, Yke, Torunn Kringlen Ervik, Mina Baarnes Eriksen, Ida Kero, Vidar Skaug, and Shanbeh Zienolddiny. "Cellular Responses of Industrially Relevant Silica Dust on Human Glial Cells In Vitro." International Journal of Molecular Sciences 20, no. 2 (2019): 358. http://dx.doi.org/10.3390/ijms20020358.

Full text

Abstract:

Despite the rigorous emission control measures in the ferroalloy industry, there are still emissions of dust during the production of various alloys. Dust particles were collected from laboratory scale processes where oxide particulate matter was formed from liquid silicon (metallurgical grade). The dust was produced in a dry air atmosphere to mimic industrial conditions. To investigate possible effects of ultrafine dust on the central nervous system, a human astrocytic cell line was employed to investigate inflammatory effects of particles as astrocytes play a number of active and neuron supp

APA, Harvard, Vancouver, ISO, and other styles

41

Sharma, Jaswinder, and Georgios Polizos. "Hollow Silica Particles: Recent Progress and Future Perspectives." Nanomaterials 10, no. 8 (2020): 1599. http://dx.doi.org/10.3390/nano10081599.

Full text

Abstract:

Hollow silica particles (or mesoporous hollow silica particles) are sought after for applications across several fields, including drug delivery, battery anodes, catalysis, thermal insulation, and functional coatings. Significant progress has been made in hollow silica particle synthesis and several new methods are being explored to use these particles in real-world applications. This review article presents a brief and critical discussion of synthesis strategies, characterization techniques, and current and possible future applications of these particles.

APA, Harvard, Vancouver, ISO, and other styles

42

Liawthanyarat, Nutthaphon, and Sarawut Rimdusit. "Effects of Particles Size of Nanosilica on Properties of Polybenzoxazine Nanocomposites." Key Engineering Materials 659 (August 2015): 394–98. http://dx.doi.org/10.4028/www.scientific.net/kem.659.394.

Full text

Abstract:

Polybenzoxazine nanocomposites filled with three different sizes of silica nanoparticles are investigated for their mechanical and thermal properties. In this research, silica nanoparticles with primary particle sizes of 7, 14 and 40 nm were incorporated in polybenzoxazine matrix at a fixed content of 3% by weight. From the experimental results, the storage modulus of the polybenzoxazine nanocomposite was found to systematically increase with decreasing the particle sizes of nanosilica suggesting better reinforcement of the smaller particles. Glass transition temperature was found to slightly

APA, Harvard, Vancouver, ISO, and other styles

43

Li, Yangliang, Chao Shen, Li Shao, and Yujun Zhang. "Dynamic image acquisition and particle recognition of laser-induced exit surface particle ejection in fused silica." Chinese Optics Letters 17, no. 10 (2019): 101402. http://dx.doi.org/10.3788/col201917.101402.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Zheng, Xue Ming, Xiao Na Duan, Yang Yang Sun, and Hui Jian Shang. "Determine the Average Particle Size of Silica Sol." Advanced Materials Research 997 (August 2014): 312–16. http://dx.doi.org/10.4028/www.scientific.net/amr.997.312.

Full text

Abstract:

At present, the methods of analysising the average particle size of silica sol are the intuitive analysis, such as analysising the size distribution and morphology of the particle by the laser particle size instrument and the transmission electron microscopy. But some of the small particles tend to be ignored. Using the classical chemical titration method and BET to auxiliary analysis can make the date more complete. Through the comprehensive analysis with the four methods, found that longer reaction time have the effect of purification of sol system.

APA, Harvard, Vancouver, ISO, and other styles

45

Marti-Montava, Felipe, Ann Opsommer, and David Garcia-Sanoguera. "Influence of Silica Fume Source on Crystallization of Xonotlite in a New Process Making Medium Density Ca-Silicate Based Products." Key Engineering Materials 788 (November 2018): 3–12. http://dx.doi.org/10.4028/www.scientific.net/kem.788.3.

Full text

Abstract:

This paper investigates the influence of different types of silica fume on the crystallization process of medium density calcium silicate based products. The products are formed by a new technology that consists of two steps. In the first step, a mixture containing calcium silicate hydrates (C-S-H) is formed by reaction of lime with special silicas at temperatures below 100°C. This mixture is then molded into boards by a filter-pressing technique. In the second step, the boards are treated in hydrothermal conditions enabling the conversion of the C-S-H into important contents of xonotlite (Ca6

APA, Harvard, Vancouver, ISO, and other styles

46

Pitukhin, Aleksandr Vasilyevich, Gennady Nikolaevich Kolesnikov, Nikolai Gennadievich Panov, and Sergey Borisovich Vasilyev. "Amorphous Silica Micro Powder Additive Influence on Bending Strength of One-Ply Particle Board." Key Engineering Materials 706 (August 2016): 82–85. http://dx.doi.org/10.4028/www.scientific.net/kem.706.82.

Full text

Abstract:

The methods and results of experimental investigation on the additive influence of amorphous silica micro powder when mixed in the glue for one-ply particle board are presented in the article. Wooden particles of coniferous and hardwood species as well as glue solution based on carbamide-formaldehyde resin were used for boards manufacturing. The amorphous silica micro powder contained particles 8 μm by the size and specific surface 120...400 m2/g was used in the experiment. The samples were tested to determine their physical-mechanical properties. It was found that 1 % amorphous silica micro p

APA, Harvard, Vancouver, ISO, and other styles

47

Mendes, Thiago Melanda, and Wellington Longuini Repette. "Nano-silica added to Portland cement." Acta Scientiarum. Technology 43 (June 14, 2021): e51699. http://dx.doi.org/10.4025/actascitechnol.v43i1.51699.

Full text

Abstract:

For a controlled particle size distribution, nano-silica was added to three different cements. The chemical and mineralogical compositions of the cements were characterized by fluorescence and X-ray diffraction. The granulometric distributions of cements and nano-silicas were obtained by laser granulometry and dynamic lightning scattering. The specific surface area of the raw materials was determined by gas adsorption. The effect of nano-silica and type of cement on rheological behavior was evaluated by rotational rheometry. The mechanical performance was investigated through the compression s

APA, Harvard, Vancouver, ISO, and other styles

48

Yoo, Jung Whan, Dong Shin Yun, and Hyun Jung Kim. "Influence of Reaction Parameters on Size and Shape of Silica Nanoparticles." Journal of Nanoscience and Nanotechnology 6, no. 11 (2006): 3343–46. http://dx.doi.org/10.1166/jnn.2006.006.

Full text

Abstract:

It was investigated that the effect of various synthesis parameters such as, types of silicon alkoxides and alcohols, ammonia (catalyst) concentration, and reaction temperature on the particle size and shape of silica nanosphere by Sol–Gel method. When different silicon alkoxides were used, the silica particles except tetramethylorthosilicate (TMOS), all were spherical, and after reaching a maximum, the sizes were decreased with carbon chain length due to its steric effect. As the alcohol chain length increased from methanol (MeOH) to n-butanol (BuOH), the average particle size was increased f

APA, Harvard, Vancouver, ISO, and other styles

49

Mohd, Firdaus Omar, Md Akil Hazizan, and Zainal Arifin Ahmad. "Effect of Particle Sizes on Rate Sensitivity and Dynamic Mechanical Properties of Polypropylene/Silica (PP/Sio₂) Nanocomposites." Advanced Materials Research 364 (October 2011): 181–85. http://dx.doi.org/10.4028/www.scientific.net/amr.364.181.

Full text

Abstract:

Filler-related characteristic such as particle size, shape and geometry are essential factors that need to be considered during the evaluation of the material’s performance especially in the area of particle filled composites. However, there is limited number of works are reported on this particular issue under high strain rate condition. Based on this concern, the paper presents an experimental results on the effect of particle sizes towards rate sensitivity and dynamic compressive properties of polypropylene/silica nanocomposites across strain rate from 10-2to 10-3s-1. The composite specimen

APA, Harvard, Vancouver, ISO, and other styles

50

Wu, Li Li, Ling Zi Zeng, Hai Bo Chen, and Chao Can Zhang. "Preparation and Characterization of Poly(Acrylamide)/Silica Nanocomposite Gels." Advanced Materials Research 306-307 (August 2011): 1252–56. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.1252.

Full text

Abstract:

A series of PAM/silica nanocomposite (NC) gels using silica sol as the inorganic component were prepared by in situ free-radical polymerization. The addition of silica sol was first used to bring silica nanoparticles to form organic (polymer)/inorganic system. Results from the swelling experiment indicated that the effect of silica particle was nevertheless rather complex as polymer/particle binding. Additionally, it revealed that the swelling ratio of the NC gels with a certain silica content increased with the increasing pH value. Moreover, it exhibited absorption of the polymer onto silica

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!