Method for preparing aluminum nitride ceramics with high heat conduction and high strength by SPS sintering
A high-strength technology for aluminum nitride ceramics, which is applied in the field of SPS sintering to prepare high thermal conductivity and high-strength aluminum nitride ceramics. It can solve the problems of small porosity and does not consider the improvement of thermal conductivity and strength of aluminum nitride ceramics. , to achieve the effects of reducing scattering, reducing the number of grain boundary phases, and inhibiting growth
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0020] 1. Raw material powder: the raw material is aluminum nitride powder with a primary particle size of 100 nanometers, and the sintering aid is yttrium fluoride;
[0021] 2. Powder mixing: Put 1000g of aluminum nitride powder, 20g of yttrium fluoride, and 1wt% oleic acid into a ball mill tank, add 2000g of high-purity zirconia balls, 2000ml of absolute ethanol, mix for 10 hours after ball milling, dry and sieve to obtain the mixture powder;
[0022] 3. Forming and pre-sintering: press the mixed powder to obtain a green body, the pressing pressure is 80MPa, and then pre-sinter the green body at a temperature of 1500°C in a nitrogen-containing reducing atmosphere at normal pressure for 4 hours, and the gas flow rate is 2L / min , wherein the volume fraction of nitrogen is 90%, the volume fraction of ammonia is 5%, and the volume fraction of hydrogen cyanide is 5%;
[0023] 4. Final sintering: The pre-sintered billet is subjected to spark plasma sintering under the protection ...
Embodiment 2
[0026] 1. Raw material powder: the raw material is aluminum nitride powder with a primary particle size of 80 nanometers, and the sintering aid is lanthanum fluoride;
[0027] 2. Powder mixing: put 1000g of aluminum nitride powder, 30g of lanthanum fluoride, and 1wt% oleic acid into a ball mill jar, add 2000g of high-purity zirconia balls, 2000ml of absolute ethanol, mix for 10 hours after ball milling, dry and sieve to obtain the mixture powder;
[0028] 3. Forming and pre-sintering: Press the mixed powder to obtain a green body, the pressing pressure is 50MPa, and then pre-sinter the green body at a temperature of 1400°C in a nitrogen-containing reducing atmosphere for 4 hours, and the gas flow rate is 3L / min, where The volume fraction of nitrogen is 95%, the volume fraction of ammonia is 2%, and the volume fraction of hydrogen cyanide is 3%;
[0029] 4. Final sintering: The pre-sintered compact was subjected to spark plasma sintering under the protection of high-purity nit...
Embodiment 3
[0032] 1. Raw material powder: the raw material is aluminum nitride powder with a primary particle size of 60 nanometers, and the sintering aid is yttrium fluoride;
[0033] 2. Powder mixing: Put 1000g of aluminum nitride powder, 15g of yttrium fluoride, and 1wt% oleic acid into a ball mill tank, add 2000g of high-purity zirconia balls, 2000ml of absolute ethanol, mix for 10 hours after ball milling, dry and sieve to obtain the mixture powder;
[0034] 3. Forming and pre-sintering: press the mixed powder to obtain a green body, the pressing pressure is 100MPa, and then pre-sinter the green body at a temperature of 1300°C in a nitrogen-containing reducing atmosphere for 2 hours, and the gas flow rate is 3L / min, where The volume fraction of nitrogen is 80%, the volume fraction of ammonia is 10%, and the volume fraction of hydrogen cyanide is 10%;
[0035]4. Final sintering: The pre-sintered billet is subjected to spark plasma sintering under the protection of high-purity nitrog...
PUM
Property | Measurement | Unit |
---|---|---|
particle diameter | aaaaa | aaaaa |
size | aaaaa | aaaaa |
flexural strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com