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Sintering aid for preparing silicon nitride ceramic and silicon nitride ceramic
The invention belongs to the technical field of ceramics, and particularly relates to a sintering aid for preparing silicon nitride ceramics and the silicon nitride ceramics. The invention provides a sintering aid for preparing silicon nitride ceramic. The sintering aid is prepared from silicon dioxide and lithium oxide, the mass ratio of silicon dioxide to lithium oxide is (1.7-2): 1. The silicon dioxide and the lithium oxide are used as the sintering aids for sintering the silicon nitride, so that the silicon nitride can be sintered for a relatively short time at a relatively low temperature, and the silicon nitride ceramic with excellent performance can be prepared. In the invention, when silicon dioxide and lithium oxide in a specific mass ratio are used as sintering aids for sintering silicon nitride, Li2O plays a role of a fluxing agent and generates liquid lithium silicate with SiO2 at a relatively low temperature, and the liquid lithium silicate can promote rearrangement of silicon nitride particles and liquid phase filling, so that the aim of low-temperature sintering densification of silicon nitride is fulfilled.
本发明属于陶瓷技术领域，具体涉及一种制备氮化硅陶瓷的烧结助剂、氮化硅陶瓷。本发明提供的制备氮化硅陶瓷的烧结助剂，由二氧化硅和氧化锂组成；所述二氧化硅和氧化锂的质量比为1.7～2:1。本发明以二氧化硅和氧化锂作为氮化硅烧结的烧结助剂能够在较低温度下对氮化硅进行较短时间的烧结能够制备得到性能优异的氮化硅陶瓷。在本发明中，以特定质量比的二氧化硅和氧化锂作为氮化硅烧结的烧结助剂时，Li2O起助熔剂作用的同时和SiO2在较低的温度下生成液态硅酸锂，液态硅酸锂可以促进氮化硅颗粒重排和液相填充，从而实现氮化硅的低温烧结致密的目的。
Sintering aid for preparing silicon nitride ceramic and silicon nitride ceramic
The invention belongs to the technical field of ceramics, and particularly relates to a sintering aid for preparing silicon nitride ceramics and the silicon nitride ceramics. The invention provides a sintering aid for preparing silicon nitride ceramic. The sintering aid is prepared from silicon dioxide and lithium oxide, the mass ratio of silicon dioxide to lithium oxide is (1.7-2): 1. The silicon dioxide and the lithium oxide are used as the sintering aids for sintering the silicon nitride, so that the silicon nitride can be sintered for a relatively short time at a relatively low temperature, and the silicon nitride ceramic with excellent performance can be prepared. In the invention, when silicon dioxide and lithium oxide in a specific mass ratio are used as sintering aids for sintering silicon nitride, Li2O plays a role of a fluxing agent and generates liquid lithium silicate with SiO2 at a relatively low temperature, and the liquid lithium silicate can promote rearrangement of silicon nitride particles and liquid phase filling, so that the aim of low-temperature sintering densification of silicon nitride is fulfilled.
本发明属于陶瓷技术领域，具体涉及一种制备氮化硅陶瓷的烧结助剂、氮化硅陶瓷。本发明提供的制备氮化硅陶瓷的烧结助剂，由二氧化硅和氧化锂组成；所述二氧化硅和氧化锂的质量比为1.7～2:1。本发明以二氧化硅和氧化锂作为氮化硅烧结的烧结助剂能够在较低温度下对氮化硅进行较短时间的烧结能够制备得到性能优异的氮化硅陶瓷。在本发明中，以特定质量比的二氧化硅和氧化锂作为氮化硅烧结的烧结助剂时，Li2O起助熔剂作用的同时和SiO2在较低的温度下生成液态硅酸锂，液态硅酸锂可以促进氮化硅颗粒重排和液相填充，从而实现氮化硅的低温烧结致密的目的。
Sintering aid for preparing silicon nitride ceramic and silicon nitride ceramic
一种制备氮化硅陶瓷的烧结助剂、氮化硅陶瓷
QIAO ZHUHUI (Autor:in) / CHI YUANHAO (Autor:in) / WANG LUJIE (Autor:in) / YU YUAN (Autor:in) / LI TONGYANG (Autor:in) / TANG HUAGUO (Autor:in) / HUANG HAO (Autor:in)
15.12.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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