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Rapid reduction of titanium dioxide nano-particles by reduction with a calcium reductant

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Title: Rapid reduction of titanium dioxide nano-particles by reduction with a calcium reductant
Authors: Kikuchi, Tatsuya Browse this author →KAKEN DB
Yoshida, Masumi Browse this author
Matsuura, Shiki Browse this author
Natsui, Shungo Browse this author →KAKEN DB
Tsuji, Etsuji Browse this author
Habazaki, Hiroki Browse this author →KAKEN DB
Suzuki, Ryosuke O. Browse this author →KAKEN DB
Keywords: Electronic materials
Chemical synthesis
Issue Date: Sep-2014
Publisher: Elsevier
Journal Title: Journal of Physics and Chemistry of Solids
Volume: 75
Issue: 9
Start Page: 1041
End Page: 1048
Publisher DOI: 10.1016/j.jpcs.2014.04.016
Abstract: Micro-, submicron-,andnano-scaletitaniumdioxideparticleswerereducedbyreductionwithametallic calcium reductantincalciumchloridemoltensaltat1173K,andthereductionmechanismoftheoxides by thecalciumreductantwasexplored.Theseoxideparticles,metalliccalciumasareducingagent,and calcium chlorideasamoltensaltwereplacedinatitaniumcrucibleandheatedunderanargon atmosphere. Titaniumdioxidewasreducedtometallictitaniumthroughacalciumtitanateandlower titanium oxide,andthematerialsweresinteredtogethertoformamicro-poroustitaniumstructurein molten saltathightemperature.Thereductionrateoftitaniumdioxidewasobservedtoincreasewith decreasing particlesize;accordingly,theresidualoxygencontentinthereducedtitaniumdecreases.The obtained micro-poroustitaniumappeareddarkgrayincolorbecauseofitslowsurfacereflection. Micro- porous metallictitaniumwithalowoxygencontent(0.42wt%)andalargesurfacearea(1.794m2 g 1) can besuccessfullyobtainedbyreductionunderoptimalconditions.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 菊地 竜也

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