Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Large-size silicon nitride ceramic ball valve element and preparation method and application thereof
The invention relates to the field of ceramic materials, and discloses a large-size silicon nitride ceramic ball valve element and a preparation method and application thereof.The preparation method comprises the steps that a mixture of silicon nitride powder, a sintering aid and beta silicon nitride seed crystals serves as a raw material, and the raw material is pressed into a blank and turned into a valve element biscuit; and sintering the valve core biscuit to prepare the silicon nitride ceramic ball valve core. Through a special pressing method and optimization of a sintering curve, the product has a bimodal distribution microstructure, and the uniformity, compactness, fracture toughness and Weibull modulus of the product are improved, so that the situation of cracks in the preparation process and the use process is reduced, and the qualification rate and wear resistance of the product are improved.
本发明涉及陶瓷材料领域，公开了一种大尺寸氮化硅陶瓷球阀阀芯及其制备方法与应用，以氮化硅粉、烧结助剂和β氮化硅晶种的混合物为原料，压制成坯体后车加工为阀芯素坯；再将阀芯素坯进行烧结，制备氮化硅陶瓷球阀阀芯。通过特殊的压制方法，同时优化烧结曲线，使产品具有双峰分布的微观结构，提高了产品的均匀性、致密度、断裂韧性和韦布尔模数，从而减少了制备过程中和使用过程中出现裂纹的情况，提高了产品的合格率和耐磨性。
Large-size silicon nitride ceramic ball valve element and preparation method and application thereof
The invention relates to the field of ceramic materials, and discloses a large-size silicon nitride ceramic ball valve element and a preparation method and application thereof.The preparation method comprises the steps that a mixture of silicon nitride powder, a sintering aid and beta silicon nitride seed crystals serves as a raw material, and the raw material is pressed into a blank and turned into a valve element biscuit; and sintering the valve core biscuit to prepare the silicon nitride ceramic ball valve core. Through a special pressing method and optimization of a sintering curve, the product has a bimodal distribution microstructure, and the uniformity, compactness, fracture toughness and Weibull modulus of the product are improved, so that the situation of cracks in the preparation process and the use process is reduced, and the qualification rate and wear resistance of the product are improved.
本发明涉及陶瓷材料领域，公开了一种大尺寸氮化硅陶瓷球阀阀芯及其制备方法与应用，以氮化硅粉、烧结助剂和β氮化硅晶种的混合物为原料，压制成坯体后车加工为阀芯素坯；再将阀芯素坯进行烧结，制备氮化硅陶瓷球阀阀芯。通过特殊的压制方法，同时优化烧结曲线，使产品具有双峰分布的微观结构，提高了产品的均匀性、致密度、断裂韧性和韦布尔模数，从而减少了制备过程中和使用过程中出现裂纹的情况，提高了产品的合格率和耐磨性。
Large-size silicon nitride ceramic ball valve element and preparation method and application thereof
一种大尺寸氮化硅陶瓷球阀阀芯及其制备方法与应用
SUN FENG (Autor:in) / LI BIN (Autor:in) / SHEN CHANGSHENG (Autor:in) / WANG RUIQIANG (Autor:in) / WANG ZAIYI (Autor:in) / ZHANG JI (Autor:in) / WANG TENGFEI (Autor:in) / LIU KUODI (Autor:in) / DONG TINGXIA (Autor:in) / ZHANG WEIRU (Autor:in)
24.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
F16K
VALVES
,
Ventile
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