ジルコニア焼結体及びその製造方法

Japanese Patent JP7371387

B2

There is provided a structure of a zirconia sintered body exhibiting a bright red color by use of a color produced by cerium oxide, the structure enabling a change in the visually perceived color of a surface without changing the composition. A complex sintered body is characterized by comprising a lamination of a layer composed of a zirconia sintered body containing 0.5% or more by mole and less than 4% by mole of an oxide of cerium in terms of CeO₂, 2% or more by mole and less than 6% by mole of yttria and 0.1% or more by mass and less than 2% by mass of an oxide of aluminum, the balance being zirconia, the oxide of cerium containing trivalent cerium, and the zirconia having a crystal structure including a tetragonal; and at least one of a layer composed of a zirconia-based sintered body containing 2.0% or more by mass and 20.0% or less by mass of an oxide of aluminum, the balance being zirconia containing 2% or more by mole and less than 6% by mole of yttria, and a layer composed of a zirconia-based sintered body containing 2% or more by mole and less than 6% by mole of yttria and a coloring agent, the balance being zirconia, a lightness L* being 10 or more and 75 or less, a hue a* being -3 or less or 3 or more, a hue b* being -3 or less or 3 or more, a chroma C* being 1 or more and 30 or less in an L*a*b* color system.

Satoshi Tsuchiya
Hiroyuki Fujisaki
Hitoshi Nagayama

JP2019145096A

October 31, 2023

August 07, 2019

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Tosoh Corporation

C04B35/488; A44C27/00

JP2017075086A
JP2018080064A
JP2017105689A
JP2016216289A
JP2017160108A
JP2017160110A

US20190194076

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