Patent ID: 8454933
Filing Date: 2013-06-04
Classification: C04B,C23C,H01J,Y10T

Abstract:
1. A polycrystalline magnesium oxide (MgO) sintered body which is obtained by a uniaxial pressure sintering process of sintering an MgO raw material powder under uniaxial pressure, the polycrystalline MgO sintered body satisfying relation: αV (111)/αH (111) >1.5, wherein αV (111) is a value of α (111) in a surface to which the uniaxial pressure is applied, and αH (111) is a value of α (111) in a surface perpendicular to the surface to which the uniaxial pressure is applied, wherein the α (111) is a (111) face ratio expressed as formula (1), wherein the Ra is expressed as formula: Ra=I (111)/ (1(111) +1 (200)), and wherein the I (111) is an X-ray diffraction intensity of a MgO (111) face in the sintered body, and the I (200) is an X-ray diffraction intensity of a MgO (200) face in the sintered body.