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Dissertations / Theses on the topic 'Powders characterization'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Yildirim, Ismail. "Surface Free Energy Characterization of Powders." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/27525.

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Microcalorimetric measurements and contact angle measurements were conducted to study the surface chemistry of powdered minerals. The contact angle measurements were conducted on both flat and powdered talc samples, and the results were used to determine the surface free energy components using Van Oss-Chaudhury-Good (OCG) equation. It was found that the surface hydrophobicity of talc increases with decreasing particle size. At the same time, both the Lifshitz-van der Waals (gSLW) and the Lewis acid-base (gSAB) components (and, hence, the total surface free energy (gS)) decrease with decrea

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2

Ceder, Joakim. "Characterization of uranium oxide powders and sinterability." Thesis, KTH, Kemiteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299501.

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Uranoxid (UOx) är ett energitätt material som ofta används i kärnbränsle. UOx-pulver pressas och sintras för att tillverka urandioxidkutsar som förs in i bränslestavar. Stavarna monteras slutligen ihop till ett bränsleknippe. Tillverkningsprocessens stabilitet och förutsägbarhet är viktiga. För att åstadkomma önskvärda egenskaper hos UO2-kutsarna är karaktärisering av UOx-pulvret centralt. Sintringsaktivitet är den viktigaste egenskapen när det kommer till att beskriva hur UOx-pulvret beter sig vid reduktion i högtemperatursintring. Återcyklat UO2 oxideras till U3O8 och kan användas till att s

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3

Pan, Qi. "Laser ablative production of metallic and ceramic ultrafine powders : plasma plume analysis and powder characterization." HKBU Institutional Repository, 1998. http://repository.hkbu.edu.hk/etd_ra/170.

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4

Kalender, Volkan. "Characterization Of Electrolyte And Pyrotechnic Powders And Pellets." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12612959/index.pdf.

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Electrolyte and pyrotechnic pellets are two important components of thermal batteries. Both electrolyte and pyrotechnic pellets are produced by cold compaction of constituent powders. These compacts are integrated in the battery as pellets with sufficient green density, green strength, calorific energy and burning rate (for pyrotechnic only) to provide high performance batteries. In this study, effects of physical properties of the used powders such as particle size distribution, average particle size, particle shape and composition of components and applied compression pressure and their inte

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5

Yang, Zhengtao. "CHARACTERIZATION AND AQUEOUS COLLOIDAL PROCESSING OF TUNGSTEN NANO-POWDERS." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2693.

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Extensive attention has been paid to consolidate nanoparticles into nanocrystalline components that possess better properties than their coarse-grained counterparts. Nanocrystalline monolithic tungsten (W) has been envisaged to possess better properties than coarse-grained tungsten and to improve the performance of many military components. Commercially available nano-W powders were characterized via X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES) and Brunauer, Emmett,

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6

Shang, Yajuan. "Preparation and characterization of praseodymium oxide films and powders." Thesis, University of North Texas, 2004. https://digital.library.unt.edu/ark:/67531/metadc4450/.

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Nanocrystalline praseodymium oxide films have been successfully generated on stainless steel substrates. The electrochemical deposition was performed in the cathode compartment of a divided electrochemical cell with a regular three-electrode configuration. The green films obtained by electrodeposition were then annealed at high temperatures for 1-3 hours. X-ray diffraction revealed the fluorite structure of Pr6O11 and the crystallite size was calculated. X-ray photoelectron spectroscopy was employed to study the composition of the oxide films and also the oxidation state of Pr. Scanning electr

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7

Yavaş, Mert Okur Salih. "Fabrication and characterization of MgB2 powders and Cu-Clad MgB2 wires/." [s.l.]: [s.n.], 2005. http://library.iyte.edu.tr/tezler/master/fizik/T000373.pdf.

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8

Kim, Jin Young. "Synthesis and Characterization of Bulk Metallic Glasses, Composites and Hybrid Porous Structures by Powder Metallurgy of Metallic Glassy Powders." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-170795.

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Metallic glasses exhibit many attractive attributes such as outstanding mechanical, magnetic, and chemical properties. Due to the absence of crystal defects, metallic glasses display remarkable mechanical properties including higher specific strength than crystalline alloys, high hardness and larger fracture resistance than ceramics. The technological breakthrough of metallic glasses, however, has been greatly hindered by the limited plastic strain to failure. Thus, several strategies have been employed to improve the intrinsic and extrinsic effects on the flow behavior of metallic glasses wit

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9

Kim, Jin Young. "Synthesis and Characterization of Bulk Metallic Glasses, Composites and Hybrid Porous Structures by Powder Metallurgy of Metallic Glassy Powders." Doctoral thesis, Technische Universität Dresden, 2014. https://tud.qucosa.de/id/qucosa%3A28746.

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Metallic glasses exhibit many attractive attributes such as outstanding mechanical, magnetic, and chemical properties. Due to the absence of crystal defects, metallic glasses display remarkable mechanical properties including higher specific strength than crystalline alloys, high hardness and larger fracture resistance than ceramics. The technological breakthrough of metallic glasses, however, has been greatly hindered by the limited plastic strain to failure. Thus, several strategies have been employed to improve the intrinsic and extrinsic effects on the flow behavior of metallic glasses w

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10

Atem-Tambe, Ntoh. "Characterization of Fluoropolymer Powders Made By Supercritical Assisted Mixing With Crystalline Additives." VCU Scholars Compass, 2005. http://scholarscompass.vcu.edu/etd/1365.

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This research project investigates a new technique to efficiently mix crystalline solid additives with polymers by gentle ball milling with steel balls in the presence of carbon dioxide (C02) at 17 to 30°C and 1300 to 2500 psig. As the ball milling system is agitated, the steel balls transfer mechanical energy to the fluoropolymer and additive thereby converting them to powders. C02 is added into the chamber to expand the polymer and make it amenable to impregnation by the additive. At the end of the mixing process, a free flowing powder is produced consisting of the additive coated with fluor

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11

Nordström, Josefina. "Compression analysis as a tool for technical characterization and classification of pharmaceutical powders." Doctoral thesis, Uppsala University, Department of Pharmacy, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9214.

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<p>There are today strong incentives for an increased understanding of material properties and manufacturing processes to facilitate the development of new technologies in the pharmaceutical industry. The purpose of this thesis was to suggest methods requiring a low sample amount for characterization of technical properties of powders.</p><p>Compression analysis was used to evaluate the formulation relevance of some compression equations. Using the mechanics of single granules to estimate powder functionality was part of this work. It was concluded that the formability of granular solids and t

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12

Wangler, Julia [Verfasser], and Reinhard [Akademischer Betreuer] Kohlus. "Characterization of the rehydration behavior of food powders / Julia Wangler ; Betreuer: Reinhard Kohlus." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2020. http://d-nb.info/1207389234/34.

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13

Sneed, Brian D. "Synthesis and characterization of Al-Nanodiamond composite powders by high-energy ball milling." Monterey, California. Naval Postgraduate School, 2011. http://hdl.handle.net/10945/10698.

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High-energy ball milling was studied for the ex situ strengthening of aluminum (Al) with nanodiamond (ND). Al-ND metal matrix composite powders with 5 wt% and 10 wt% nanodiamond were synthesized by high-energy ball milling of the blended component powders. Stearic acid was used as a process control agent to minimize agglomeration of the powders upon milling. A uniform distribution of the ND reinforcement was successfully obtained after milling the powders for a period of ten hours with a ball-to-powder ratio of 30:1 in a SPEX 8000M ball mill. Composition and properties of the Al-ND composite w

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14

Şimşek, Deniz Çiftçioğlu Muhsin. "Preparation and characterization of HA powders-dense and porous HA based composite materials/." [s.l.: [s.n.], 2002. http://library.iyte.edu.tr/tezler/master/malzemebilimivemuh/T000326.pdf.

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15

Pettersson, Tim. "Characterization of Metal Powders Produced by Two Gas Atomizing Methods for Thermal Spraying Applications." Thesis, KTH, Materialvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-180352.

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This thesis work is focused on the influence of process parameters during gas atomization on the thermal spraying properties of a Ni-Cr-B-Si hardfacing alloy. The metal powder alloy, known as 1-60-20, is produced by Höganäs AB. There have been problems with insufficient fusing during flame spraying of this particular alloy sometimes, even though the chemical composition is always within spec. This has lead to a theory that the difference in performance is caused by differences in parameters during gas atomization. Several gas-gas and gas-water atomizations with varying parameters were performe

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16

Gonzaga, de Resende Valdirene. "Synthesis and characterization of Fe-containing oxide powders and carbon nanotube-Fe-oxide nanocomposites." Toulouse 3, 2009. http://thesesups.ups-tlse.fr/493/.

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Les nanotubes de carbone (NTC), très petits, creux et monodimensionnels, sont très étudiés du fait de leurs excellentes propriétés thermiques, électriques et mécaniques. Les buts de cette thèse étaient premièrement de préparer des poudres et mousses de solutions solides Fe/Al2O3 et des poudres Fe/Al6Si2O13, servant comme matériaux catalytiques pour la synthèse de nanocomposites NTC-Fe-oxyde, et deuxièmement de faire une étude approfondie de tous ces matériaux par spectroscopie Mössbauer du 57Fe et de corréler les résultats avec ceux issus d'autres techniques, de manière à obtenir des informati

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17

Narasimhan, Sridhar. "Dynamic behavior characterization of fine powders consisting of a homogeneous emulsion & Synthesis and decomposition of methane gas hydrate : a reaction engineering study /." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1644.

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18

Eisele, Prescott L. "Characterization of material behavior during the manufacturing process of a co-extruded solid oxide fuel cell." Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04072004-004054/unrestricted/Eisele%5FPrescott%5FL%5F200405%5FMS.pdf.

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Thesis (M.S.)--Engineering, Georgia Institute of Technology, 2004.<br>McDowell, David, Committee Chair; Neu, Richard, Committee Member; Lee, Jim, Committee Member; Cochran, Joe, Committee Member. Includes bibliographical references (leaves 159-162).

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19

Fan, Junpeng. "Synthesis and advanced structural and magnetic characterization of mesoporous transition metal–doped sno2 powders and films." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/457982.

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Aquesta Tesi doctoral comprèn la síntesi mitjançant nanoemmotllament (de l’anglès, nanocasting) i autoassemblatge per evaporació induïda (de l’anglès, evaporation–induced self–assembly) i la caracterització exhaustiva de pols i capes de SnO2 mesoporós dopat amb Ni i Cu. L’origen de les propietats magnètiques d’aquests materials es discuteix en detall. En primer lloc, es van sintetitzar per nanoemmotllament a partir de motlles de sílice KIT–6, pols mesoporosa ordenada de SnO2 dopada amb diferents quantitats de Ni. Es va verificar la replicació correcta del motlle de sílice mitjançant microscòp

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20

Tsaknopoulos, Kyle Leigh. "Computational Thermodynamic and Kinetic Modeling and Characterization of Phase Transformations in Rapidly Solidified Aluminum Alloy Powders." Digital WPI, 2019. https://digitalcommons.wpi.edu/etd-dissertations/516.

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Cold Spray is a solid-state additive manufacturing process that uses metallic feedstock powders to create layers on a substrate through plastic deformation. This process can be used for the repair of mechanical parts in the aerospace industry as well as for structural applications. Aluminum alloy powders, including Al 6061, 7075, 2024, and 5056, are typically used in this process as feedstock material. Since this process takes place all in the solid state, the properties and microstructure of the initial feedstock powder directly influence the properties of the final consolidated Cold Spray p

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21

Kociba, Keith J. "Thermoanalytical and calorimetric characterization of postassium, rubidium and cesium substituted titanyl arsenate single crystals and powders /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487949150071613.

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22

Charbonneau, Cecile. "Aqueous solution synthesis of nanocrystalline TiO2 powders: kinetics, characterization and application to fabrication of dye-sensitized solar cell photoanodes." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103625.

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The scope of this thesis is the aqueous synthesis and characterization of titanium dioxide nanostructured powders for the fabrication of thin film photoanodes used in DSC devices. The development and study of this novel process is approached from the standpoint of determining the relationship between the hydrolytic behaviour of isothermally treated titanium tetrachloride aqueous solutions (speciation and kinetics of conversion of Ti(IV) into TiO2(s)) and the properties of the resultant TiO2 products. From an application standpoint, the aqueous synthesized nanocrystalline TiO2 material is studi

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23

Caputo, Matthew P. "4-Dimensional Printing and Characterization of Net-Shaped Porous Parts Made from Magnetic Ni-Mn-Ga Shape Memory Alloy Powders." Youngstown State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1525436335401265.

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24

Afrassiabian, Zahra. "Multiscale investigation of caking phenomenon of lactose powders : from physico-chemical aspects to industrial applications." Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2475/document.

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Cette thèse porte sur le problème fondamental du mottage des poudres suite aux mécanismes de transition de phase. Le projet vise à étudier l'impact des facteurs intrinsèques (structure moléculaire des matériaux, propriétés physiques et/ou physicochimiques, etc.) ou des facteurs environnementaux (conditions de stockage ou paramètres de procédé) sur la stabilité de la structure des poudres. Plus précisément, notre étude a mis en évidence le rôle prépondérant du phénomène de cristallisation et des transitions entre les différents polymorphes du lactose. L'accent a été mis sur le rôle des phénomèn

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25

Kim, Jin Young [Verfasser], Jürgen [Akademischer Betreuer] Eckert, and Do-Hyang [Akademischer Betreuer] Kim. "Synthesis and Characterization of Bulk Metallic Glasses, Composites and Hybrid Porous Structures by Powder Metallurgy of Metallic Glassy Powders / Jin Young Kim. Gutachter: Jürgen Eckert ; Do-Hyang Kim. Betreuer: Jürgen Eckert." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://d-nb.info/1073206955/34.

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26

Seelam, Uma Maheswara Rao. "Structural characterization of sputter-deposited SS304+xAl (x = 0, 4, 7 and 10 wt.%) coatings and mechanically milled Ti, Zr and Hf powders." Orlando, Fla. : University of Central Florida, 2010. http://purl.fcla.edu/fcla/etd/CFE0003161.

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27

Chakravarty, Somik. "Mechanical properties of cohesionless and cohesive bulk solids : transition from non-cohesive to cohesive powders." Thesis, Compiègne, 2018. http://www.theses.fr/2018COMP2423.

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La manutention et la mise en œuvre des matériaux granulaires libèrent de fines particules de poussière qui, dans un contexte professionnel, peuvent gravement affecter la santé et la sécurité des travailleurs, ainsi que le fonctionnement global de l'installation. L’émission de poussières et la capacité d'un matériau à libérer des particules de poussière, dépendent de plusieurs paramètres relatifs au matériau mais aussi au procédé. Ces émissions sont généralement mesurées par des tests d'empoussièrement à l'échelle du laboratoire. Ces tests reposent principalement sur des études expérimentales e

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28

Seelam, Uma Maheswara. "STRUCTURAL CHARACTERIZATION OF SPUTTER-DEPOSITED SS304+XAL (X = 0, 4, 7 AND 10 WT.%) COATINGS AND MECHANICALLY MILLED TI, ZR AND." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3527.

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Study of the metastable phases obtained by non-equilibrium processing techniques has come a long way during the past five decades. New metastable phases have often given new perspectives to the research on synthesis of novel materials systems. Metastable materials produced by two non-equilibrium processing methods were studied for this dissertation- 304-type austenitic stainless steel (SS304 or Fe-18Cr-8Ni)+aluminum coatings produced by plasma enhanced magnetron sputter-deposition (PEMS) and nanocrystalline Ti, Zr and Hf powders processed by mechanical milling (MM). The objective of the study

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29

Kirabira, John Baptist. "Properties of Ugandan minerals and fireclay refractories." Doctoral thesis, KTH, Materials Science and Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-225.

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<p>Development of products which can be produced from a country’s natural resources is very important as far as the industrialization of a nation and saving foreign exchange is concerned. Presently, industries in Uganda and the other states in the Lake Victoria region import all refractory-related-consumables, as the demand cannot be met locally. Based on the abundance of ceramic raw materials for high temperature applications in the region and the demand for refractories by industries it is pertinent to develop and manufacture firebricks by exploiting the locally available raw materials.</p><

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Beyerlein, Kenneth Roy. "Simulation and modeling of the powder diffraction pattern from nanoparticles: studying the influence of surface strain." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41211.

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Accurate statistical characterization of nanomaterials is crucial for their use in emerging technologies. This work investigates how different structural characteristics of metal nanoparticles influence the line profiles of the corresponding powder diffraction pattern. The effects of crystallite size, shape, lattice dynamics, and surface strain are all systematically studied in terms of their impact on the line profiles. The studied patterns are simulated from atomistic models of nanoparticles via the Debye function. This approach allows for the existing theories of diffraction to be tested,

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31

Dubos, John-Lee. "Determination of the controlling parameters of agglomeration of Mn dusts in order to improve process predictability Agglomeration potential evaluation of industrial Mn dusts and sludges based on physico-chemical characterization Binder-free tableting experiments on manganese oxides and industrial mineral powders." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASJ009.

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Les poussières (<3 mm) générées chaque année par les industries minières et métallurgiques ont un impact économique et écologique conséquent. Le recyclage de ces matériaux par l’agglomération à froid et sans liant est la meilleure option, mais ces procédés manquent de prédictibilité. La présente étude vise à améliorer cette prédictibilité grâce à une meilleure compréhension des phénomènes.Une caractérisation étendue des propriétés chimiques, physiques et morphologiques a été réalisée sur les matériaux fins généré durant la production d’alliages de ferromanganèse. Une prédiction qualitative

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32

Cordts, Eike [Verfasser]. "Advanced Powder Characterization Techniques for Inhalation Powder Mixtures / Eike Cordts." Kiel : Universitätsbibliothek Kiel, 2014. http://d-nb.info/1064175279/34.

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YE, BING-LIANG, and 葉炳良. "Characterization of pharmaceutical powders and tablets." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/39773871516529759276.

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Lin, Shu-Ping, and 林淑萍. "Preparation and Characterization of LaMnO3 Powders." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/52121939141955114085.

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Sousa, Rui Pedro Tavares. "Hugoniot Characterization of WC-Ni Powders." Master's thesis, 2015. http://hdl.handle.net/10316/38999.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra<br>Tungsten Carbide mixed with Nickel (WC-Ni) is of great importance in applications that requires high levels of hardness and wear resistance due to the combination of properties granted by the presence of two different phases: Tungsten Carbide phase imparts the hardness and the strength while metallic matrix acts to increase ductility and toughness. The dynamic behaviour of WC-Ni powders, with Nickel content of 11% was studied under planar loading conditions.

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Ying-Chieh, Weng. "Synthesis and Characterization of Nanocrystalline Magnetite Powders." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-1107200611494700.

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Pei-HsienChang and 張珮嫻. "Preparation and Characterization of Cerium Oxide Powders." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/94879563289810463441.

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碩士<br>國立成功大學<br>化學工程學系碩博士班<br>101<br>Cerium dioxide (CeO2) powders were synthesized with adding hydrogen peroxide (H2O2) by the precipitation technique. The investigation of precipitation reaction and properties of products were emphasized in this work. Experimentally, the precipitation reactions were performed under various adding time of H2O2, H2O2 concentrations, reaction temperatures, and valences of cerium precursors. The effects of preparation conditions on the particle size, shape, crystalline structure, surface area and catalytic activity of final CeO2 products were investigated. Moreo

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Weng, Ying-Chieh, and 翁瑩潔. "Synthesis and Characterization of Nanocrystalline Magnetite Powders." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/90368086476283368797.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>94<br>Nanocrystalline magnetite powders were synthesized by an electrocoagulation technique and the microstructure of the oxide powder was found to evolve in roughly three stages: formation and growth of severely defective colloidal crystallites, agglomeration, and coarsening. A mechanism involving competition between nucleation and growth of free colloids and coarsening of the skeletal framework was proposed to explain the temporary level-off in crystallite size during the synthesis. A modified method was developed to synthesize ultrafine magnetite (less than 10 nm

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hsiung, hung-chia, and 熊宏佳. "Preparation and characterization of ZnxCd1-xO powders." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/vg5948.

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Karthik, Sajith Babu. "Characterization of milk protein concentrate powders using powder rheometer and front-face fluorescence spectroscopy." Thesis, 2018. http://hdl.handle.net/2097/38852.

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Master of Science<br>Food Science Institute<br>Jayendra K. Amamcharla<br>Milk protein concentrate (MPC) powders are high-protein dairy ingredients obtained from membrane filtration processes and subsequent spray drying. MPC powders have extensive applications due to their nutritional, functional, and sensory properties. However, their flow properties, rehydration behavior, and morphological characteristics are affected by various factors such as processing, storage, particle size, and composition of the powder. Literature has shown that knowledge about the powder flowability characteristics is

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TING, HUANG YU, and 黃玉婷. "Preparation and Characterization of Nanosized La-Perovskite Powders." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/94253874609728562769.

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碩士<br>國立成功大學<br>化學工程學系<br>88<br>Abstract In order to increase the specific surface area, the hydrothermal and sol-gel methods were employed to prepare the nanosized Perovskite-type LaBO3 (B= Fe, Co, Mn) catalysts. The effects of alkalinity (R), reaction time, temperature and pressure on the formation of LaBO3 powders were investigated. PAA and nitrates were chosen as the reactants and the pH value was controlled at 2 when the sol-gel method was applied. High molecular weight of PAA was preferred for the sake of high coiling. These powders were characterized by the techniques suc

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Tai, Shu-Chen, and 戴淑媜. "Formation and Characterization of Cu-based Amorphous Alloys Powders." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/64051392036855920620.

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碩士<br>大同大學<br>材料工程研究所<br>91<br>This study examined the amorphization behavior of Cu-based alloy powders synthesized by mechanical alloying technique. The microstructural evolution during mechanical alloying of the mixed powders was investigated by both X-ray diffraction and scanning electron microscopy（SEM）. The phase stabilities of the as-milled powders were studied by the DSC measurement. According to the results, after 5 hours of milling, the mechanically alloyed powders were amorphous at Cu-based alloys with B and Si. The thermal stability of the Cu-based amorphous powders was also investi

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Chao, Li-min, and 趙莉敏. "Fabrication and Characterization of Cu2ZnSnS4 Powders by Hydrothermal Method." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/50854224575495199356.

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碩士<br>國立臺南大學<br>材料科學系碩士班<br>99<br>Cu2ZnSnS4 (CZTS) powders were prepared by using hydrothermal method at a synthesizing temperature of 180°C. In order to obtain optimum synthesis conditions, using a variety of preparation conditions, for example, reactant species, hydrothermal reaction time and concentration of the reactant. All CZTS powders were characterized by X-ray diffraction (XRD), X-ray Fluorescence Spectrometer (XRF), scanning electron microscopy (SEM) and UV/Vis/NIR Spectrophotometer. In reactant species, the metals element came from the chloride and elemental sulfur from thiourea. Th

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Peng, Ying-Jie, and 彭英傑. "Microwave-assisted Synthesis and Characterization of Cobalt Titanate Powders." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/11799212673386127548.

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碩士<br>國立高雄大學<br>應用化學系碩士班<br>98<br>Cobalt titanate (CoTiO3) possessed high dielectric properties, special electronic structure, optical absorption properties and charge transport properties, so it can apply in semiconductor devices, chemical catalysts and gas sensors etc. Traditionally, CoTiO3 is synthesized by solid state reaction whose temperature is required above 1000°C. Many researches attemped to resolve this problem, but reducing synthesis temperature tends to generate impurities of titaninm dioxide and cobalt oxide. Therefore, it is a challenge to produce of pure cobalt titanate. This r

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Carneim, Robert David. "Characterization of uniaxial compaction in spray dried ceramic powders." 2000. http://etda.libraries.psu.edu/theses/available/etd-1012100-112457/.

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Hsu, Xiu-Hui, та 許秀慧. "Characterization of Bi1-XNbXO1.5+δ Powders by Hydrothermal Synthesis". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/6g5dam.

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碩士<br>國立臺北科技大學<br>材料科學與工程研究所<br>98<br>The aim of this study was to develop bismuth-based solid electrolytes with high ionic conductivity for intermediate temperature (500～800oC) SOFC (solid oxide fuel cell) instead of conventional YSZ electrolytes showing very low ionic conductivity during 500～800oC. In this study, a series of Bi1-XNbxO1.5+δ powders were fabricated hydrothermally by altering the mineralizers, reaction temperature and holding time. The precursor of bismuth nitrate and niobium oxide were fabricated nano size Bi1-XNbXO1.5+δ powders. The specimen were characterized by X-ray diffr

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Chen, Chi Fin, and 陳琪芬. "Preparation and characterization of C60 powders and thin films." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/96899695869429102377.

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碩士<br>中原大學<br>應用物理學系<br>82<br>C60 is prepared in gram quantities by contact-arc vaporation graphite rod in a 400-Torr atmosphere of helium, followed by extration of the resultant graphitic soot with toluene. The yield of C60 is increased from 1% up to 9% by controlled the flow rate helium from 1LPM up to 6LPM, and the yield of C60 sustains at 9% 6LPM to 10LPM. Therefore, we find that there is a relation the yield of C60 and the flow rate of helium at least in our arc- furnace. In addition,

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Li, Chung-Ming, and 李忠明. "Characterization of Al-doped FeSi2 Powders Annealed in Forming Gas." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86734469788145979257.

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碩士<br>中興大學<br>材料工程學系所<br>95<br>In this study, Al-doped FeSi2 compounds were prepared by using vacuum arc remelting and ball-milling. The p-type FeSi2 compounds were ground into powder, then annealed in forming gas for various times and temperatures to transform into the semiconducting β phase. The composition, structure and particle size properties were characterized by means of inductively coupled plasma-mass spectrometer (ICP-MS), elemental analyzer (EA), X-ray diffractometer (XRD), Raman spectroscopy, Fourier transformation infrared spectroscopy (FTIR), photon correlation spectroscopy (PCS)

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Guo-QinWang and 王國欽. "The Photo-Electrical Characterization ofCu2ZnSnS4 Powders Synthesized byMicrowave-Assisted Method." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/05396317037406365072.

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碩士<br>國立成功大學<br>光電科學與工程學系<br>100<br>We propose a novel method,Microwave-Assisted method,where advantages including fast and facile for preparing materials. We ﬁrst synthesize Cu2ZnSnS4 (CZTS)nanoparticles by the method.We synthesize Cu2ZnSnS4 (CZTS) nanoparticles by changing diﬀerent conditions as reaction temperature,hoding temperature time,annealed temperature,and concentrateion of Ar during annealing.Subsequently,observing eﬀects between materials with those diﬀerent conditions using XRD,Raman,and SEM.Finally,we ﬁnd a the best condition to prepare CZTS materials,which then is deposited onto

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Hong, Yu Chen, and 洪郁宸. "Preparation and characterization of Cu2SnSe3 powders using solution growth technology." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/nmqfjt.

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碩士<br>長庚大學<br>化工與材料工程學系<br>104<br>In this study, the ternary Cu2SnSe3 semiconductor thin films were prepared using the thermal treatment of Cu2SnSe3 particles obtained from solution growth technology. The effects of Cu/Sn molar ratios in samples on the structural, electrical, and optical properties of the samples were investigated. The average particle size of the samples decreased with an increase in [Sn]/[Cu] molar ratio. X-ray diffraction pattern(XRD) and energy dispersive analysis of X-ray(EDAX) show that there were Se vacancies when the annealing temperature is higher than 450°C and the o

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