A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SILICON NITRIDE-BASED CERAMIC MEMBER AND ACCESSORY
PROBLEM TO BE SOLVED: To provide a silicon nitride-based ceramic member that is light-weight and has a high hardness, is excellent in resistance to processing such as polishing, and further is excellent in appearance quality.SOLUTION: The silicon nitride-based ceramic member contains silicon nitride-based ceramics as a main constituent as well as further contains MoO. The silicon nitride-based ceramic member has at least 1 mirror polished surface. The mirror polished surface has an arithmetic average roughness Ra of 0.01 μm or less. At least the mirror polished surface exhibits a black tone having a lightness index Lin the CIE 1976 Labcolor space of 9 or more and 12 or less, a chromaticness index aof -1 or more and 0 or less, and a chromaticness index bof -1 or more and 0 or less.SELECTED DRAWING: None
【課題】軽量且つ高硬度であり、研磨などの加工に対する耐性に優れ、さらには外観品質に優れた窒化ケイ素系セラミックス部材を提供すること。【解決手段】窒化ケイ素系セラミックス部材は、窒化ケイ素系セラミックスを主成分として含むとともにＭоＯ3をさらに含む。窒化ケイ素系セラミックス部材は少なくとも１つの鏡面研磨面を有する。鏡面研磨面の算術平均粗さＲａは０．０１μｍ以下である。少なくとも鏡面研磨面は、ＣＩＥ１９７６Ｌ＊ａ＊ｂ＊色空間における明度指数Ｌ＊が９以上１２以下であり、クロマティクネス指数ａ＊が−１以上０以下であり、且つ、クロマティクネス指数ｂ＊が−１以上０以下である黒色調を呈する。【選択図】なし
SILICON NITRIDE-BASED CERAMIC MEMBER AND ACCESSORY
PROBLEM TO BE SOLVED: To provide a silicon nitride-based ceramic member that is light-weight and has a high hardness, is excellent in resistance to processing such as polishing, and further is excellent in appearance quality.SOLUTION: The silicon nitride-based ceramic member contains silicon nitride-based ceramics as a main constituent as well as further contains MoO. The silicon nitride-based ceramic member has at least 1 mirror polished surface. The mirror polished surface has an arithmetic average roughness Ra of 0.01 μm or less. At least the mirror polished surface exhibits a black tone having a lightness index Lin the CIE 1976 Labcolor space of 9 or more and 12 or less, a chromaticness index aof -1 or more and 0 or less, and a chromaticness index bof -1 or more and 0 or less.SELECTED DRAWING: None
【課題】軽量且つ高硬度であり、研磨などの加工に対する耐性に優れ、さらには外観品質に優れた窒化ケイ素系セラミックス部材を提供すること。【解決手段】窒化ケイ素系セラミックス部材は、窒化ケイ素系セラミックスを主成分として含むとともにＭоＯ3をさらに含む。窒化ケイ素系セラミックス部材は少なくとも１つの鏡面研磨面を有する。鏡面研磨面の算術平均粗さＲａは０．０１μｍ以下である。少なくとも鏡面研磨面は、ＣＩＥ１９７６Ｌ＊ａ＊ｂ＊色空間における明度指数Ｌ＊が９以上１２以下であり、クロマティクネス指数ａ＊が−１以上０以下であり、且つ、クロマティクネス指数ｂ＊が−１以上０以下である黒色調を呈する。【選択図】なし
SILICON NITRIDE-BASED CERAMIC MEMBER AND ACCESSORY
窒化ケイ素系セラミックス部材および装飾品
HAYAKAWA YASUTAKE (author) / MURAMATSU KATSUTOSHI (author)
2016-12-08
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME