Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Porous silicon nitride ceramic with excellent high-temperature performance and preparation method thereof
The invention relates to a porous silicon nitride ceramic with excellent high-temperature performance and a preparation method thereof. The preparation method of the porous silicon nitride ceramic comprises the following steps: (1) mixing silicon powder, silicon nitride powder and a sintering aid to obtain mixed powder; and (2) carrying out compression molding on the obtained mixed powder to obtain a green body; and (3) embedding the obtained green body by adopting embedding powder consisting of silicon powder and silicon nitride powder, and then conducting igniting in a nitrogen atmosphere toinitiate self-propagating synthesis so as to obtain the porous silicon nitride ceramic, wherein the sintering aid is at least one selected from Yb2O3 and La2O3, and the addition amount of the sintering aid in the mixed powder is 0.1-0.6 wt% of the total mass of the silicon powder and the silicon nitride powder.
本发明涉及一种具有优异高温性能的多孔氮化硅陶瓷及其制备方法，所述多孔氮化硅陶瓷的制备方法包括：（1）将硅粉、氮化硅粉和烧结助剂混合，得到混合粉体；（2）将所得混合粉体压制成型后，得到生坯；（3）采用由硅粉和氮化硅粉组成的埋粉包埋所得生坯，然后在氮气气氛中进行点火，引发自蔓延合成，得到所述多孔氮化硅陶瓷；所述烧结助剂选自YbO、LaO中的至少一种；所述混合粉体中烧结助剂的添加量为硅粉和氮化硅粉总质量的0.1～0.6wt%。
Porous silicon nitride ceramic with excellent high-temperature performance and preparation method thereof
The invention relates to a porous silicon nitride ceramic with excellent high-temperature performance and a preparation method thereof. The preparation method of the porous silicon nitride ceramic comprises the following steps: (1) mixing silicon powder, silicon nitride powder and a sintering aid to obtain mixed powder; and (2) carrying out compression molding on the obtained mixed powder to obtain a green body; and (3) embedding the obtained green body by adopting embedding powder consisting of silicon powder and silicon nitride powder, and then conducting igniting in a nitrogen atmosphere toinitiate self-propagating synthesis so as to obtain the porous silicon nitride ceramic, wherein the sintering aid is at least one selected from Yb2O3 and La2O3, and the addition amount of the sintering aid in the mixed powder is 0.1-0.6 wt% of the total mass of the silicon powder and the silicon nitride powder.
本发明涉及一种具有优异高温性能的多孔氮化硅陶瓷及其制备方法，所述多孔氮化硅陶瓷的制备方法包括：（1）将硅粉、氮化硅粉和烧结助剂混合，得到混合粉体；（2）将所得混合粉体压制成型后，得到生坯；（3）采用由硅粉和氮化硅粉组成的埋粉包埋所得生坯，然后在氮气气氛中进行点火，引发自蔓延合成，得到所述多孔氮化硅陶瓷；所述烧结助剂选自YbO、LaO中的至少一种；所述混合粉体中烧结助剂的添加量为硅粉和氮化硅粉总质量的0.1～0.6wt%。
Porous silicon nitride ceramic with excellent high-temperature performance and preparation method thereof
一种具有优异高温性能的多孔氮化硅陶瓷及其制备方法
ZENG YUPING (Autor:in) / ZHANG YE (Autor:in) / ZUO KAIHUI (Autor:in) / XIA YONGFENG (Autor:in) / YAO DONGXU (Autor:in) / YIN JINWEI (Autor:in) / LIANG HANQIN (Autor:in)
22.05.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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