Ceramic complex, light source for projector, and method for producing ceramic complex
US-2019309223-A1 · Oct 10, 2019 · US
Ceramic sintered body
US10766820B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10766820-B2 |
| Application number | US-201716312362-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 19, 2017 |
| Priority date | Jun 27, 2016 |
| Publication date | Sep 8, 2020 |
| Grant date | Sep 8, 2020 |
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Abstract
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The durability of a ceramic sintered body is improved, and a reduction in its light emission intensity and the occurrence of a chromaticity variation are suppressed. The ceramic sintered body contains alumina and a compound represented by M13-XM2XM35O12. The volume percent of the compound in the ceramic sintered body is from 3% to 70% inclusive. The ratio of the intensity of XRD from a complex oxide of aluminum and M2 to the intensity of XRD from the compound in the ceramic sintered body is less than 0.05. The average grain diameter of the alumina contained in the ceramic sintered body is from 0.30 (μm) to 3.00 (μm) inclusive. M1 is at least one selected from Sc, Y, and lanthanoid elements, and M2 is at least one selected from lanthanoid elements except any lanthanoid element selected for M1. M3 is at least one of Al and Ga, and X is from 0.003 to 0.500 inclusive.
First claim
Opening claim text (preview).
What is claimed is: 1. A ceramic sintered body characterized by comprising: alumina (Al 2 O 3 ); and a compound represented by M1 3-X M2 X M3 5 O 12 , wherein the volume percent of the compound in the ceramic sintered body is from 3% to 70% inclusive; the ratio of the intensity of X-ray diffraction from a complex oxide of aluminum (Al) and the M2 to the intensity of X-ray diffraction from the compound in the ceramic sintered body is less than 0.05; the average grain diameter of the alumina (Al 2 O 3 ) contained in the ceramic sintered body is from 0.30 (μm) to 3.00 (μm) inclusive; the M1 is at least one selected from scandium (Sc), yttrium (Y), and lanthanoid elements; the M2 is at least one selected from lanthanoid elements except any lanthanoid element selected for the M1; the M3 is at least one of aluminum (Al) and gallium (Ga); and the X is from 0.003 to 0.500 inclusive. 2. A ceramic sintered body according to claim 1 , wherein the M1 is at least one selected from scandium (Sc), yttrium (Y), gadolinium (Gd), terbium (Tb), erbium (Er), ytterbium (Yb), and lutetium (Lu); and the M2 is at least one selected from cerium (Ce), europium (Eu), terbium (Tb), and ytterbium (Yb) except the at least one element selected for the M1. 3. A ceramic sintered body according to claim 2 , wherein the M1 is yttrium (Y). 4. A ceramic sintered body according to claim 2 , wherein the M2 is cerium (Ce). 5. A ceramic sintered body according claim 1 , wherein the M3 is aluminum (Al). 6. A ceramic sintered body according to claim 2 , wherein the M1 is yttrium (Y), the M2 is cerium (Ce), and the M3 is aluminum (Al).
Assignees
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Classifications
Aluminates · CPC title
Optical properties · CPC title
Thermal properties, e.g. thermal expansion coefficient · CPC title
Micrometer sized grains, i.e. from 1 to 100 micron · CPC title
Submicron sized grains, i.e. from 0,1 to 1 micron · CPC title
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- What does patent US10766820B2 cover?
- The durability of a ceramic sintered body is improved, and a reduction in its light emission intensity and the occurrence of a chromaticity variation are suppressed. The ceramic sintered body contains alumina and a compound represented by M13-XM2XM35O12. The volume percent of the compound in the ceramic sintered body is from 3% to 70% inclusive. The ratio of the intensity of XRD from a complex …
- Who is the assignee on this patent?
- Ngk Spark Plug Co
- What technology area does this patent fall under?
- Primary CPC classification C04B35/117. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 08 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).