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Method for preparing porous silicon nitride ceramic by using ultralow-content sintering aid
The invention relates to a method for preparing porous silicon nitride ceramic by using an ultralow-content sintering aid, which comprises the following steps of: (1) mixing silicon powder, silicon nitride powder and a sintering aid to obtain mixed powder, (2) carrying out compression molding on the obtained mixed powder to obtain a green body, and (3) embedding the obtained green body by adoptingembedded powder consisting of silicon powder and silicon nitride powder, and then igniting in a nitrogen atmosphere to initiate self-propagating synthesis to obtain the porous silicon nitride ceramic. The sintering aid is selected from at least one of Y2O3, CeO2, MgO and Al2O3; and the addition amount of the sintering aid in the mixed powder is 0.2-0.9 wt% of the total mass of the silicon powderand the silicon nitride powder.
本发明涉及一种超低含量烧结助剂制备多孔氮化硅陶瓷的方法，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YO、CeO、MgO和AlO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0.2～0.9wt%。
Method for preparing porous silicon nitride ceramic by using ultralow-content sintering aid
The invention relates to a method for preparing porous silicon nitride ceramic by using an ultralow-content sintering aid, which comprises the following steps of: (1) mixing silicon powder, silicon nitride powder and a sintering aid to obtain mixed powder, (2) carrying out compression molding on the obtained mixed powder to obtain a green body, and (3) embedding the obtained green body by adoptingembedded powder consisting of silicon powder and silicon nitride powder, and then igniting in a nitrogen atmosphere to initiate self-propagating synthesis to obtain the porous silicon nitride ceramic. The sintering aid is selected from at least one of Y2O3, CeO2, MgO and Al2O3; and the addition amount of the sintering aid in the mixed powder is 0.2-0.9 wt% of the total mass of the silicon powderand the silicon nitride powder.
本发明涉及一种超低含量烧结助剂制备多孔氮化硅陶瓷的方法，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YO、CeO、MgO和AlO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0.2～0.9wt%。
Method for preparing porous silicon nitride ceramic by using ultralow-content sintering aid
一种超低含量烧结助剂制备多孔氮化硅陶瓷的方法
ZENG YUPING (author) / ZHANG YE (author) / ZUO KAIHUI (author) / XIA YONGFENG (author) / YAO DONGXU (author) / YIN JINWEI (author) / LIANG HANQIN (author)
2020-05-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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