A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
ALUMINA SINTERED COMPACT MEMBER
To provide an alumina sintered compact member having low dielectric loss, excellent corrosion resistance, and reduced particle generation; an alumina sintered compact member capable of forming a uniform protective film on a surface thereof; and an alumina sintered compact member on which the uniform protective film is formed on the surface thereof.SOLUTION: An alumina sintered compact member of the present invention comprises an alumina sintered compact containing: at least 99.5% wt.% of aluminum oxide; 100 ppm or more but 1,000 ppm or less of Mg; 25 ppm or more but 100 ppm or less of Na; and 100 ppm or more but 1,000 ppm or less of Si, wherein the alumina sintered compact has a density of at least 3.97 g/cm3. An average particle diameter of alumina particles on any one surface of the alumina sintered compact in a (500×500 μm) square area is 2 μm or more but 6 μm or less; an average aspect ratio of the alumina particles is 0.5 or more but 1 or less; an arithmetic average height Sa in the square area is 0.2 μm or less; and an aspect ratio Str of the surface quality is 0.05 or more but less than 1.SELECTED DRAWING: None
【課題】誘電損失が少なく、耐食性に優れ、パーティクルの発生が抑制されたアルミナ焼結体部材、また表面に、均一な保護膜を形成することができるアルミナ焼結体部材、また表面に、均一な保護膜が形成されたアルミナ焼結体部材を提供することを目的とする。【解決手段】本発明にかかるアルミナ焼結体部材は、酸化アルミニウムを少なくとも９９．５ｗｔ％、Ｍｇを１００ｐｐｍ以上１０００ｐｐｍ以下、Ｎａを２５ｐｐｍ以上１００ｐｐｍ以下、Ｓｉを１００ｐｐｍ以上１０００ｐｐｍ以下含有し、密度が少なくとも３．９７ｇ／ｃｍ3のアルミナ焼結体からなり、アルミナ焼結体の任意の一表面で（５００×５００μｍ）四方エリアにおけるアルミナ粒子の平均粒径が２μｍ以上６μｍ以下、アルミナ粒子の平均アスペクト比は０．５以上１以下であり、四方エリアにおける算術平均高さＳａが０．２μｍ以下、表面性状のアスペクト比Ｓｔｒが０．０５以上１未満である。【選択図】なし
ALUMINA SINTERED COMPACT MEMBER
To provide an alumina sintered compact member having low dielectric loss, excellent corrosion resistance, and reduced particle generation; an alumina sintered compact member capable of forming a uniform protective film on a surface thereof; and an alumina sintered compact member on which the uniform protective film is formed on the surface thereof.SOLUTION: An alumina sintered compact member of the present invention comprises an alumina sintered compact containing: at least 99.5% wt.% of aluminum oxide; 100 ppm or more but 1,000 ppm or less of Mg; 25 ppm or more but 100 ppm or less of Na; and 100 ppm or more but 1,000 ppm or less of Si, wherein the alumina sintered compact has a density of at least 3.97 g/cm3. An average particle diameter of alumina particles on any one surface of the alumina sintered compact in a (500×500 μm) square area is 2 μm or more but 6 μm or less; an average aspect ratio of the alumina particles is 0.5 or more but 1 or less; an arithmetic average height Sa in the square area is 0.2 μm or less; and an aspect ratio Str of the surface quality is 0.05 or more but less than 1.SELECTED DRAWING: None
【課題】誘電損失が少なく、耐食性に優れ、パーティクルの発生が抑制されたアルミナ焼結体部材、また表面に、均一な保護膜を形成することができるアルミナ焼結体部材、また表面に、均一な保護膜が形成されたアルミナ焼結体部材を提供することを目的とする。【解決手段】本発明にかかるアルミナ焼結体部材は、酸化アルミニウムを少なくとも９９．５ｗｔ％、Ｍｇを１００ｐｐｍ以上１０００ｐｐｍ以下、Ｎａを２５ｐｐｍ以上１００ｐｐｍ以下、Ｓｉを１００ｐｐｍ以上１０００ｐｐｍ以下含有し、密度が少なくとも３．９７ｇ／ｃｍ3のアルミナ焼結体からなり、アルミナ焼結体の任意の一表面で（５００×５００μｍ）四方エリアにおけるアルミナ粒子の平均粒径が２μｍ以上６μｍ以下、アルミナ粒子の平均アスペクト比は０．５以上１以下であり、四方エリアにおける算術平均高さＳａが０．２μｍ以下、表面性状のアスペクト比Ｓｔｒが０．０５以上１未満である。【選択図】なし
ALUMINA SINTERED COMPACT MEMBER
アルミナ焼結体部材
KOBAYASHI RYO (author) / FUKAZAWA YUJI (author) / KAWAKAMI KANA (author)
2024-05-15
Patent
Electronic Resource
Japanese
HIGH-WITHSTANDING-VOLTAGE ALUMINA SINTERED COMPACT AND HIGH-WITHSTANDING-VOLTAGE MEMBER
| European Patent Office | 2020
High-withstanding-voltage alumina sintered compact and high-withstanding-voltage member
| European Patent Office | 2017
SILICON NITRIDE SINTERED COMPACT AND HEAT CONDUCTION MEMBER
| European Patent Office | 2015
ALUMINA SINTERED COMPACT AND ELECTROSTATIC DEFLECTOR INCLUDING THE SAME
| European Patent Office | 2015