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Preparation method of porous silicon nitride ceramic with oriented pore structure
The invention relates to a preparation method of porous silicon nitride ceramic with an oriented pore structure, which comprises the following steps: (1) dispersing silicon powder, silicon nitride powder, a sintering aid and an adhesive into tert-butyl alcohol to obtain ceramic slurry; (2) pouring the obtained ceramic slurry into a mold, carrying out freeze curing under a one-way cold source, andcarrying out drying and glue discharging to obtain a ceramic precursor; and (3) embedding the obtained ceramic precursor by adopting embedded powder consisting of silicon powder and silicon nitride powder, igniting in a nitrogen atmosphere, and initiating self-propagating synthesis to obtain the porous silicon nitride ceramic with the oriented pore structure.
本发明涉及一种定向孔结构多孔氮化硅陶瓷的制备方法，包括：（1）将硅粉、氮化硅粉、烧结助剂和粘结剂分散于叔丁醇中，得到陶瓷浆料；（2）将所得陶瓷浆料倒入模具中，在单向冷源下进行冷冻固化，再经干燥和排胶，得到陶瓷前驱体；（3）采用由硅粉和氮化硅粉组成的埋粉包埋所得陶瓷前驱体，在氮气气氛中点燃，引发自蔓延合成，得到所述定向孔结构多孔氮化硅陶瓷。
Preparation method of porous silicon nitride ceramic with oriented pore structure
The invention relates to a preparation method of porous silicon nitride ceramic with an oriented pore structure, which comprises the following steps: (1) dispersing silicon powder, silicon nitride powder, a sintering aid and an adhesive into tert-butyl alcohol to obtain ceramic slurry; (2) pouring the obtained ceramic slurry into a mold, carrying out freeze curing under a one-way cold source, andcarrying out drying and glue discharging to obtain a ceramic precursor; and (3) embedding the obtained ceramic precursor by adopting embedded powder consisting of silicon powder and silicon nitride powder, igniting in a nitrogen atmosphere, and initiating self-propagating synthesis to obtain the porous silicon nitride ceramic with the oriented pore structure.
本发明涉及一种定向孔结构多孔氮化硅陶瓷的制备方法，包括：（1）将硅粉、氮化硅粉、烧结助剂和粘结剂分散于叔丁醇中，得到陶瓷浆料；（2）将所得陶瓷浆料倒入模具中，在单向冷源下进行冷冻固化，再经干燥和排胶，得到陶瓷前驱体；（3）采用由硅粉和氮化硅粉组成的埋粉包埋所得陶瓷前驱体，在氮气气氛中点燃，引发自蔓延合成，得到所述定向孔结构多孔氮化硅陶瓷。
Preparation method of porous silicon nitride ceramic with oriented pore structure
一种定向孔结构多孔氮化硅陶瓷的制备方法
ZENG YUPING (author) / ZHANG YE (author) / ZUO KAIHUI (author) / XIA YONGFENG (author) / YAO DONGXU (author) / YIN JINWEI (author) / LIANG HANQIN (author)
2020-07-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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