| Project/Area Number |
62550231
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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 |
電子材料工学
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| Research Institution | Waseda University |
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Principal Investigator |
ICHINOSE Noboru Waseda University, Department of Materials Science and Engineering, Professor, 理工学部, 教授 (60176295)
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| Project Period (FY) |
1987 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1989: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1988: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1987: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Ball Milling / Ultrafine Particles / Functional Ceramics / Low Temperature Firing Ceramic Substrate / Superconducting Ceramics / Amorphous Ferrites / Superconducting Thick Films / Magnetic Recording Media / ボールミル粉砕 / 蛍光体 / 低温焼結積層コンデンサ / 圧電セラミックス / フェライト / 低温焼結セラミックス基板 |
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| Research Abstract |
Ultrafine particles have been obtained in two ways. The first method is pulverization of raw materials by mechanical means such as ball milling and vibrating milling. The other method is to grow particles from basic atomic units. Using various growth methods, particles 10-100A^^ﾟ in size can be produced. Usually, these small particle sizes cannot be produced by using conventional pulverization methods. Recently, we have developed new pulverization methods using small size balls of 1-3mmphi instead of usual 10mmphi ball. In this method, the average particle size of 0.1mum has been easily obtained. Ultrafine particle materials are being used for such applications as gas and humidity sensors, magnetic recording media and low temperature firing ceramics. liere, functional ceramics using ultrafine particles have been studied in the following:
(1) Low temperature firing substrates consisting of cordierite-borosilicate glass system. (2) Low temperature firing multi-layered capacitor and varistor. (3) Superconducting thick films using ultrafine particle paste in the Bi-Pb-Sr-Ca-Cu-0 system. (4) Porous sensor materials using ultrafine particles, i.e. humidity sensors made from apatite Ca_<10>(PO_4)_6(OH)_2. (5) Magnetic recording media using amorphous ferrites.
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