Title:
セラミックスシート及び結晶配向セラミックスの製造方法
Document Type and Number:
Japanese Patent JP5281269
Kind Code:
B2
Abstract:
To provide a ceramic sheet having a higher degree of orientation of crystals.
The ceramic sheet is self-supported and planar and has a thickness of 10 μm or less, wherein a surface of the sheet includes a specific crystal plane; the number of crystal grains having an aspect ratio of 3 or more present in the thickness direction of the sheet is one; and the degree of orientation of the sheet measured by the Lotgering method is 30% or more. The crystal grains are composed of an oxide which has a perovskite structure and grows into crystal grains with an isotropic shape and represented by the general formula, ABO3, wherein the site A contains at least one element selected from the group consisting of Li, Na, K, Bi, and Ag; and the site B contains at least one element selected from the group consisting of Nb, Ta, and Ti. The sheet contains an oxide which grows into crystal grains with an isotropic and polyhedral shape during firing. However, since grain growth in the thickness direction of the sheet is limited and grain growth in the surface direction of the sheet is promoted, it is possible to obtain crystal grains having a high aspect ratio and a high degree of orientation.
COPYRIGHT: (C)2009,JPO&INPIT
Inventors:
Yokoyama Shohei
Nobuyuki Kobayashi
Tsutomu Nanataki
Akira Urakawa
Application Number:
JP2007283184A
Publication Date:
September 04, 2013
Filing Date:
October 31, 2007
Assignee:
Nippon Insulator Co., Ltd.
International Classes:
C04B35/622; C04B35/00; H01L41/187; H01L41/314; H01L41/333; H01L41/39; H01L41/43
Domestic Patent References:
| JP2006185940A | | | | |
| JP2006185950A | | | | |
| JP11060333A | | | | |
| JP2010018510A | | | | |
| JP2010018511A | | | | |
| JP2003012373A | | | | |
Other References:
Yasuyoshi SAITO 他1名,Synthesis of polycrystalline platelike KNbO3 particles by the topochemical micro-crystal conversion method and fabrication of grain-oriented (K0.5Na0.5)NbO3 ceramics,Journal of the European Ceramic Society,2007年,Volume 27, Issues 13-15,Pages 4085-4092
Attorney, Agent or Firm:
Aitec International Patent Office
