1995 Fiscal Year Final Research Report Summary
Effects of ultrafine-particle layr preparation and sintering conditions on the formation process of ceramic membrane
| Project/Area Number |
06650971
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
無機工業化学
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| Research Institution | Wakayama National College of Technology |
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Principal Investigator |
TOKAMI Kenjiro Wakayama National Coll. Technol., Dept. of Material Sci. and Technol. Assistant professor, 物質工学科, 助教授 (80043529)
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| Co-Investigator(Kenkyū-buntansha) |
SHIOJI Shuhei Wakayama National Coll. Technol., Dept. of Material Sci. and Technol. Lecturer, 物質工学科, 講師 (90178848)
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| Project Period (FY) |
1994 – 1995
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| Keywords | ultrafine particle / ceramic membrane / sintering |
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| Research Abstract |
In this study, we applied a silent glow and a surface corona electrical discharges in the Chemical Vapor Deposition reactions in order to form ceramic membrane by sintering the deposited particle layr. From the experimental studies, the following results were obtained.
1) The sintering properties of the ultrafine-particle layr are much affected by both the primary particle diameter and the thickness and structure of the particle layr. For the particles less than about 0.05mum, the membrane structure was obtained by sintering the layr at the temperature about 500ﾟC below the bulk melting point.
2) By applying a silent glow or a surface corona discharge in the CVD reaction, it is possible to prepare ceramic particles which have organic groups directly from the gas phase containing organosilicon compounds and so on.
3) The pore size of the formed membrane decreases as decreasing the primary particle diameter in the CVD reaction. It was shown that an adequate material concentration in the reactant gas was in the range of 0.02-0.2% for the practical case.
4) The structure of the particle layr that was prepared only by the A.C.discharge was similar to that of the electrostatic deposition with D.C.field. In the case of narrow discharge gap, the effective layr structure for sintering could be prepared without D.C.field.
5) An adequate sintering conditions for the formation of membrane structure were the uniform heating rate of 10-40ﾟC/min. and the sintering temperature about 500ﾟC below the bulk melting point.
6) The sintering membrane structure was not much affected by the gas atmosphere in the sintering process.
7) The complex membrane structure could be obtained by sintering the particle layr containing different particles of the similar diameter.
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