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A platform for research: civil engineering, architecture and urbanism
Porous mullite and preparation method thereof
The invention discloses porous mullite and a preparation method thereof. The porous mullite has a directionally-arranged pore structure, the pore diameter is 20-200 microns, and the porosity is 71%-92%. The preparation method comprises the following steps of: 1) soaking nata de coco in alkali liquor for pretreatment, soaking in water for replacement to remove alkali, and crushing to obtain bacterial cellulose hydrogel; 2) mixing kaolin, tricalcium phosphate, sodium hexametaphosphate and the bacterial cellulose hydrogel, and performing ball milling to obtain ceramic slurry; 3) degassing the ceramic slurry, pouring the degassed ceramic slurry into a mold, carrying out freeze molding, demolding, and carrying out freeze drying to obtain a ceramic green body; and 4) placing the ceramic green body in an air atmosphere, and heating for sintering. The porous mullite has a directionally arranged pore structure, is simple in preparation process, low in production cost, safe and environment-friendly, and has a wide application prospect in the fields of catalyst carriers, high-temperature flue gas filtration, molten metal filtration and the like.
本发明公开了一种多孔莫来石及其制备方法。本发明的多孔莫来石具有定向排列的孔结构，孔径为20～200μm，孔隙率为71％～92％，其制备方法包括以下步骤：1)将椰果浸入碱液进行预处理，用水浸泡置换除去碱，进行破碎，得到细菌纤维素水凝胶；2)将高岭土、磷酸三钙、六偏磷酸钠和细菌纤维素水凝胶混合后进行球磨，得到陶瓷浆料；3)将陶瓷浆料脱气后倒入模具进行冷冻成型，脱模，进行冷冻干燥，得到陶瓷生坯；4)将陶瓷生坯置于空气气氛中升温进行烧结。本发明的多孔莫来石具有定向排列的孔结构，其制备工艺简单、生产成本低、安全环保，在催化剂载体、高温烟气过滤、熔融金属过滤等领域具有广阔的应用前景。
Porous mullite and preparation method thereof
The invention discloses porous mullite and a preparation method thereof. The porous mullite has a directionally-arranged pore structure, the pore diameter is 20-200 microns, and the porosity is 71%-92%. The preparation method comprises the following steps of: 1) soaking nata de coco in alkali liquor for pretreatment, soaking in water for replacement to remove alkali, and crushing to obtain bacterial cellulose hydrogel; 2) mixing kaolin, tricalcium phosphate, sodium hexametaphosphate and the bacterial cellulose hydrogel, and performing ball milling to obtain ceramic slurry; 3) degassing the ceramic slurry, pouring the degassed ceramic slurry into a mold, carrying out freeze molding, demolding, and carrying out freeze drying to obtain a ceramic green body; and 4) placing the ceramic green body in an air atmosphere, and heating for sintering. The porous mullite has a directionally arranged pore structure, is simple in preparation process, low in production cost, safe and environment-friendly, and has a wide application prospect in the fields of catalyst carriers, high-temperature flue gas filtration, molten metal filtration and the like.
本发明公开了一种多孔莫来石及其制备方法。本发明的多孔莫来石具有定向排列的孔结构，孔径为20～200μm，孔隙率为71％～92％，其制备方法包括以下步骤：1)将椰果浸入碱液进行预处理，用水浸泡置换除去碱，进行破碎，得到细菌纤维素水凝胶；2)将高岭土、磷酸三钙、六偏磷酸钠和细菌纤维素水凝胶混合后进行球磨，得到陶瓷浆料；3)将陶瓷浆料脱气后倒入模具进行冷冻成型，脱模，进行冷冻干燥，得到陶瓷生坯；4)将陶瓷生坯置于空气气氛中升温进行烧结。本发明的多孔莫来石具有定向排列的孔结构，其制备工艺简单、生产成本低、安全环保，在催化剂载体、高温烟气过滤、熔融金属过滤等领域具有广阔的应用前景。
Porous mullite and preparation method thereof
一种多孔莫来石及其制备方法
ZHANG ZHIJIE (author) / LU SHUXIN (author) / HE CHANG (author) / ZHONG MINGFENG (author)
2020-08-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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