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単斜晶ZrO_2ウイスカーの気相成長


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Title: 単斜晶ZrO_2ウイスカーの気相成長
Other Titles: Vapor Phase Growth of Monoclinic ZrO_2 Whiskers
Authors: 江頭, 誠 / 勝木, 宏昭 / 高月, 誠治 / 岩永, 浩
Authors (alternative): Egashira, Makoto / Katsuki, Hiroaki / Takatsuki, Seiji / Iwanaga, Hiroshi
Issue Date: Jan-1987
Publisher: 日本セラミックス協会 / The Ceramic Society of Japan
Citation: 窯業協会誌, 95(1097), pp.138-143; 1987
Abstract: Growth of ZrO2 whiskers by the reaction of ZrCl4 and O2 or H2O was examined at 1100°-1300℃. Only powder products were obtained at temperatures below 1200℃ in both reaction systems. At 1250°-1300℃, however, monoclinic whiskers or needle crystals were produced. In ZrCl4-O2 system, the whiskers were grown on a mullite substrate together with flaky materials, bricky crystals and powder. Optimum conditions for the whisker growth were ZrCl4 1-3%, O2 0.25-0.35%, and total flow rate of the reactant gas 40-60 cm3/min. The size of the whiskers was 0.1-2μm in width and 10-100μm in length. The growth axis was the <010> direction or perpendicular to the (104) plane. In ZrCl4-H2O system, no whiskers were formed on the substrate, but needle crystals (whisker-like) and powder were obtained at the outlet of the reaction tube. The monoclinic needles were very minute, their dimension being 0.05-0.5μm in width and 0.5-3μm in length. The growthe axis was the <010> direction or perpendicular to the (104), (113) or (211) plane. Optimum conditions were ZrCl4 2-5%, H2O 3-4%, and total flow rate of the reactant 30-60 cm3/min. Electron microsopic observation revealed that the whiskers and the needles had no particles on the tops, suggesting that both of them grew by a VS mechanism.
Keywords: Zirconia / Whisker / Needle crystal / Monoclinic / Vapor phase growth / Zirconium tetrachloride / Oxygen / Water vapor / Growth mechanism / Morphology
URI: http://hdl.handle.net/10069/23583
ISSN: 00090255
Relational Links: http://ci.nii.ac.jp/naid/110002313566/
Rights: 社団法人日本セラミックス協会 / 本文データは学協会の許諾に基づきCiNiiから複製したものである
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/23583

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