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作者:

Wang, Yue (Wang, Yue.) | Zhu, Xue-Wen (Zhu, Xue-Wen.) | Jiang, Yi-Jian (Jiang, Yi-Jian.) (学者:蒋毅坚)

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EI Scopus SCIE

摘要:

(Ta2O5)1-x(TiO2)x system ceramics has been studied intensively as a promising dielectric material for next generation of high density dynamic random access memories instead of SiO2 and Si3N4. The (Ta2O5)1-x(TiO2)x ceramics with highly dielectric anisotropy can be obtained by applying relatively higher cold uniaxial pressure (200 MPa) and a high sintering temperature (1550 degrees C) to the cylindrical pellet. The dielectric permittivity of (Ta2O5)1-x(TiO2)x ceramics can be dramatically enhanced 1.5-1.8 times than the conventional disk specimen by cutting the cylindrical pellet parallel to the pressing axis. The mechanism of enhancement of dielectric constants is involved in the appearance of Hmon-TiTa18O47 solid-solution phase, preferentially grain growth and densification in (Ta2O5)1-x(TiO2)x ceramics. It is also suggested that the present work can be developed a sort of technology to enhance the physical properties of Ta2O5-based functional ceramics, esp. in dielectric properties.

关键词:

cold uniaxial press dielectric anisotropy (Ta2O5)1-x(TiO2)x

作者机构:

  • [ 1 ] [Wang, Yue]Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China
  • [ 2 ] [Zhu, Xue-Wen]Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China
  • [ 3 ] [Jiang, Yi-Jian]Beijing Univ Technol, Inst Laser Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • [Wang, Yue]Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China

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来源 :

FERROELECTRICS

ISSN: 0015-0193

年份: 2010

卷: 403

页码: 175-180

0 . 8 0 0

JCR@2022

ESI学科: PHYSICS;

JCR分区:4

中科院分区:4

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