Preparation of ultrafine zirconium dioxide particles by thermal decomposition of zirconium alkoxide vapour |
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Authors: | Motoaki Adachi Kikuo Okuyama Seongwon Moon Noboru Tohge Yasuo Kousaka |
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Affiliation: | (1) Radiation Center of Osaka Prefecture, Sinke-cho, 593 Sakai, Japan;(2) Department of Chemical Engineering, University of Osaka Prefecture, 591 Sakai, Japan;(3) Department of Applied Chemistry, University of Osaka Prefecture, 591 Sakai, Japan |
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Abstract: | Ultrafine zirconia particles are produced by thermal decomposition of zirconium tetratertiary butoxide (ZrTB) vapour. The
introduction of ZrTB vapour into the cylindrical electric furnace, is achieved by three different methods: (evaporator, pressurized
nebulizer and ultrasonic nebulizer). The properties of the fine particles obtained by these methods are mainly analysed by
X-ray diffraction and transmission electron microscopy. It is found that ultrafine zirconia particles produced at relatively
low temperatures from 600 to 700° C are spherical in the diameter range 0.035 to 0.15 μm and of tetragonal phase. Furthermore,
two-component fine particles of zirconia-ilver are generated by putting the silver solid inside the furnace containing alkoxide
vapour, and are deposited by inertia on to a glass substrate under low pressure to form films having a thickness of 17 to
33 μm. The electrical characteristics of the films are evaluated, and the conductance of the film is found to increase with
the content of the silver component. |
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