Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
METHOD FOR PREPARING SILICON NITRIDE CERAMIC MATERIAL
The present disclosure relates to a method for preparing a silicon nitride ceramic material. The method including: (1) with at least one of silicon powder and silicon nitride powder as original powder and Y2O3 powder and MgO powder as sintering aids, the original powder and the sintering aids are mixed in a protective atmosphere, and the mixture is formed into a green body; (2) the resulting green body is put into a reducing atmosphere and pretreated at 500° C. to 800° C. to obtain a biscuit; and the reducing atmosphere is a hydrogen/nitrogen mixed atmosphere with a hydrogen content not higher than 5%; (3) the resulting biscuit is put into a nitrogen atmosphere and subjected to low-temperature heat treatment at 1600° C. to 1800° C. and high-temperature heat treatment at 1800° C. to 2000° C. in sequence.
METHOD FOR PREPARING SILICON NITRIDE CERAMIC MATERIAL
The present disclosure relates to a method for preparing a silicon nitride ceramic material. The method including: (1) with at least one of silicon powder and silicon nitride powder as original powder and Y2O3 powder and MgO powder as sintering aids, the original powder and the sintering aids are mixed in a protective atmosphere, and the mixture is formed into a green body; (2) the resulting green body is put into a reducing atmosphere and pretreated at 500° C. to 800° C. to obtain a biscuit; and the reducing atmosphere is a hydrogen/nitrogen mixed atmosphere with a hydrogen content not higher than 5%; (3) the resulting biscuit is put into a nitrogen atmosphere and subjected to low-temperature heat treatment at 1600° C. to 1800° C. and high-temperature heat treatment at 1800° C. to 2000° C. in sequence.
METHOD FOR PREPARING SILICON NITRIDE CERAMIC MATERIAL
LIU XUEJIAN (Autor:in) / ZHANG HUI (Autor:in) / HUANG ZHENGREN (Autor:in) / YAO XIUMIN (Autor:in) / JIANG JINDI (Autor:in) / CHEN ZHONGMING (Autor:in)
07.03.2024
Patent
Elektronische Ressource
Englisch
METHOD FOR PREPARING SILICON NITRIDE CERAMIC MATERIAL
| Europäisches Patentamt | 2025
METHOD FOR PREPARING SILICON NITRIDE CERAMIC MATERIAL
| Europäisches Patentamt | 2022
Sintering aid for preparing silicon nitride ceramic and silicon nitride ceramic
| Europäisches Patentamt | 2023
Method for preparing silicon nitride honeycomb ceramic
| Europäisches Patentamt | 2022
Method for preparing bulk ceramic material from iron-silicon nitride powder
| Europäisches Patentamt | 2015