Ceramic structure and a method of manufacturing the same

    公开(公告)号:JP5342946B2

    公开(公告)日:2013-11-13

    申请号:JP2009159341

    申请日:2009-07-03

    Abstract: PROBLEM TO BE SOLVED: To provide a manufacturing process of a ceramic structure efficiently wherein the ceramic structure is equipped with a linear shape conductive material in its inner part while suppressing or removing defects caused by shrinkage of a ceramic upon sintering. SOLUTION: There is prepared a ceramic compact 22 containing a conductive material in its inner part includes a ceramic material 24 for forming by sintering a ceramics matrix of ceramic structure, and a conductive material 26 containing conductive component and having a hollow part 30a in its inner side capable of absorbing shrinkage stress loaded on the conductive material 26, wherein the ceramic material 24 embeds the conductive material 26 in a linear shape. Then the ceramic compact 22 is sintered. The conductive material 26 absorbs shrinkage stress generated upon sintering by deformation or contraction of the hollow part 30a, so that generation of tensile stress in the ceramic matrix can be suppressed. COPYRIGHT: (C)2010,JPO&INPIT

    Method for producing a ceramic sheet and the crystal-oriented ceramic

    公开(公告)号:JP5281269B2

    公开(公告)日:2013-09-04

    申请号:JP2007283184

    申请日:2007-10-31

    Abstract: PROBLEM TO BE SOLVED: To provide a ceramic sheet having a higher degree of orientation of crystals. SOLUTION: 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, ABO 3 , 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

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