Preparation method of high-purity high-density zirconium diboride ceramic dense body free of sintering aid
A zirconium diboride and densification technology is applied in the field of preparation of zirconium diboride ceramic dense bodies, which can solve the problems of difficult sintering and densification of ceramic powder, and achieve the effects of low manufacturing cost, high activity and simple process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0018] In this example, we take the following steps:
[0019] a. ZrB with a purity of 99.5% and an average particle size of 10 μm 2 The powder is mixed with zirconia grinding balls and grinding dispersion medium at a mass ratio of 1:8:3 and then put into a zirconia grinding jar, and Ar gas is injected into the grinding jar as a protective atmosphere during the grinding process;
[0020] b. Put the sealed grinding tank into the planetary ball mill for wet grinding, the tank speed is 200r / min, and the grinding time is 18 hours. Separation of zirconium oxide slurry, precipitation and drying of zirconium diboride slurry to obtain ZrB with an average particle size of less than 1 μm 2 High active powder;
[0021] c, the above-mentioned ZrB 2 The high-activity powder is subjected to two-step hot-pressing sintering in a vacuum atmosphere. In the first step, the heat preservation platform is set at 200°C, the vacuum degree is 5Pa, and the heat preservation is 30min; in the second st...
Embodiment 2
[0024] In this example, we take the following steps:
[0025] a. ZrB with a purity of 99.5% and an average particle size of 9 μm 2 The powder is mixed with zirconia grinding balls and grinding dispersion medium at a mass ratio of 1:10:4 and then put into a zirconia ball grinding jar, and Ar gas is injected into the grinding jar as a protective atmosphere during the grinding process;
[0026] b. Put the sealed grinding tank into the planetary ball mill for wet grinding. The rotating speed of the tank is 220r / min, and the grinding time is 19 hours. Separation of zirconium oxide slurry, precipitation and drying of zirconium diboride slurry to obtain ZrB with an average particle size of less than 1 μm 2 High active powder;
[0027] c, the above-mentioned ZrB 2 The high-activity powder is subjected to two-step hot-pressing sintering in a vacuum atmosphere. In the first step, the heat preservation platform is set at 220°C, the vacuum degree is 2Pa, and the heat preservation is 30...
Embodiment 3
[0030] In this example, we take the following steps:
[0031] a. ZrB with a purity of 99.5% and an average particle size of 12 μm 2 The powder is mixed with zirconia grinding balls and grinding dispersion medium at a mass ratio of 1:9:3 and then put into a zirconia grinding jar, and Ar gas is injected into the grinding jar as a protective atmosphere during the grinding process;
[0032] b. Put the sealed grinding tank into the planetary ball mill for wet grinding, the tank speed is 260r / min, and the grinding time is 22 hours. Separation of zirconium oxide slurry, precipitation and drying of zirconium diboride slurry to obtain ZrB with an average particle size of less than 1 μm 2 High active powder;
[0033] c, the above-mentioned ZrB 2 The high-activity powder is subjected to two-step hot-pressing sintering in a vacuum atmosphere. In the first step, the heat preservation platform is set at 240°C, the vacuum degree is 5Pa, and the heat preservation is 30min; in the second step...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More