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A platform for research: civil engineering, architecture and urbanism
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
VERFAHREN ZUR HERSTELLUNG VON SILIZIUMNITRID-KERAMIK
PROCÉDÉ DE PRÉPARATION D'UN MATÉRIAU CÉRAMIQUE AU NITRURE DE SILICIUM
LIU XUEJIAN (author) / ZHANG HUI (author) / HUANG ZHENGREN (author) / YAO XIUMIN (author) / JIANG JINDI (author) / CHEN ZHONGMING (author)
2025-02-05
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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