| Project/Area Number |
13650733
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Chiba University |
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Principal Investigator |
KAKEGAWA Kazuyuki Chiba University, Faculty of Engineering, Professor, 工学部, 教授 (50009693)
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| Co-Investigator(Kenkyū-buntansha) |
UEKAWA Naofumi Chiba University, Graduate School of Science and Technology, Associate Professor, 大学院・自然科学研究科, 助教授 (60282448)
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| Project Period (FY) |
2001 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2003: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2002: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2001: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | Spark plasma sintering / Dielectrics / Pyroelectrics / Distribution of composition / Soft-chemistry / Perovskite / Diffusion / Composite |
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| Research Abstract |
A method of a fabrication of pyroelectric material that exhibits high pyroelectric coefficient over a wide temperature region was developed using spark plasma sintering method (SPS) by a gradation of composition between two different compositions. Conditions were widely determined and the pyroelectric material which exhibits high pyroelectric coefficient in the region between 20℃ and 50℃ was obtained. In the beguiling of this research, similar property was attained by a diffusion treatment of a SPS-sintered body from a mixture of two compositions. By this method, crack is often caused because of the volume change by diffusion. Newly developed method cleared this problem. So, the newly developed method can be applied to a wide area. In order to obtain a material having few defects, starting material is desired to be fixed at higher temperatures. However, firing at high temperatures lowers the sinterability of the material. This was overcome by a use of nano-milling technology. Preparation of BaNd_2Ti_4O_<12>/Bi_4Ti_3O_<12>/Bi_4Nd_2Ti_4O_<12> laminated material was also succeeded using the characteristics of SPS. As a preparation of starting material, methods to fabricate nano-sized zinc oxide and niobium oxide were succeeded.
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