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US 11,691,921 B2Granted
Light-emitting ceramic and wavelength conversion device
AssigneeMurata Manufacturing Co., Ltd.
InventorSatoshi Kuretake
Life of this patent
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Abstract
A light-emitting ceramic that includes a pyrochlore type compound that contains 0.01 mol % or more of Bi with respect to 100 mol % of the general formula M1XM2YM3ZOW, wherein M1 is at least one of La, Y, Gd, Yb, and Lu, M2 is at least one of Zr, Sn, and Hf, M3 is at least one of Ta, Nb, and Sb, X, Y, Z, and W are positive numbers that maintain electrical neutrality, X+Y+Z=2.0, 0.005≤Z≤0.2, and 3X+4Y+5Z is 7.02 or less.
Claims20
A light-emitting ceramic comprising:
- a pyrochlore type compound that contains 0.01 mol % or more of Bi with respect to 100 mol % of a general formula M1XM2YM3ZOW, wherein
- M1 is at least one element selected from the group consisting of La, Y, Gd, Yb, and Lu,
- M2 is at least one element selected from the group consisting of Zr, Sn, and Hf,
- M3 is at least one element selected from the group consisting of Ta, Nb, and Sb,
- X, Y, Z, and W are positive numbers that maintain electrical neutrality,
- X+Y+Z=2.0,
- 0.005≤Z≤0.2,
- 3X+4Y+5Z is 7.02 or less, and
- when the light-emitting ceramic has a thickness of 0.5 mm, the linear transmittance at a wavelength of 700 nm is 40% or more.
6 more elements
A wavelength conversion device comprising:
- a wavelength converter containing a light-emitting ceramic that comprises:
- a pyrochlore type compound that contains 0.01 mol % or more of Bi with respect to 100 mol % of a general formula M1XM2YM3ZOW, wherein
- M1 is at least one element selected from the group consisting of La, Y, Gd, Yb, and Lu,
- M2 is at least one element selected from the group consisting of Zr, Sn, and Hf,
- M3 is at least one element selected from the group consisting of Ta, Nb, and Sb,
- X, Y, Z, and W are positive numbers that maintain electrical neutrality,
- X+Y+Z=2.0,
- 0.005≤Z≤0.2, and
- 3X+4Y+5Z is 7.02 or less;
- and
- a light source that irradiates the wavelength converter with ultraviolet rays.
8 more elements
Dependencies are inferred from the claim text.