Method For Producing Zirconia Sintered Compact
Patent No. EP4008699 (titled "Method For Producing Zirconia Sintered Compact") was filed by Kuraray Noritake Dental on Jul 31, 2020. The application was issued on Oct 16, 2024.
Patent Summary
A method for producing a zirconia sintered body involves firing a zirconia molded or pre-sintered body through at least three temperature increase steps (H1, H2, H3). The first step (H1) starts at room temperature to 500°C and reaches 900 to 1250°C at a rate (HR1) of 50 to 500°C/min. The second step (H2) starts at 900 to 1250°C and reaches 1300 to 1550°C at a rate (HR2) of 11 to 300°C/min. The third step (H3) starts at 1300 to 1550°C and reaches 1400 to 1650°C at a rate (HR3) of 10 to 299°C/min. The process must satisfy HR1 > HR2 and HR2/HR3 > 1 to ensure optimal color tone, translucency, and strength in short-time firing.
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Date
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EP4008699
- Application Number
- EP20848494A
- Filing Date
- Jul 31, 2020
- Status
- Granted And Under Opposition
- Sep 13, 2024
- Publication Date
- Oct 16, 2024
- External Links
- Slate, Register , Google Patents