Effect of Porogenic Agents on Properties of Microporous Mullite Aggregates

Effect of Porogenic Agents on Properties of Microporous Mullite Aggregates

Microporous mullite aggregates were prepared from bauxite by dry pressing and firing at 1 700 ℃ for 3 h with corn starch,PMMA microspheres or rice husk powder as the porogenic agent.The effects of some porogenic agents and their additions(mass fraction of 0,5％,10％,15％and 20％,respectively)on the prop...

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Veröffentlicht in:中国耐火材料（英文版） 2023, Vol.32 (3), p.31-35
Hauptverfasser: JIN Zhishang, SHAN Zhilin, ZHAO Huizhong, YU Jun, ZHANG Han
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container_issue 3
container_start_page 31
container_title 中国耐火材料（英文版）
container_volume 32
creator JIN Zhishang
SHAN Zhilin
ZHAO Huizhong
YU Jun
ZHANG Han
description Microporous mullite aggregates were prepared from bauxite by dry pressing and firing at 1 700 ℃ for 3 h with corn starch,PMMA microspheres or rice husk powder as the porogenic agent.The effects of some porogenic agents and their additions(mass fraction of 0,5％,10％,15％and 20％,respectively)on the properties of the microporous mullite aggregates were analyzed by XRD,SEM and Image-Pro Plus software.The results show that the comprehensive performance of the sample with 10％rice husk powder is the best:the closed porosity is 7.1％;the bulk density is 2.63 g·cm-3;the compressive strength is 122 MPa;the median pore size is 15.16 μm;aandtthe thermal conductivity at 500 ℃ is 2.30 W·m-1·K-1.
doi_str_mv 10.19691/j.cnki.1004-4493.2023.03.007
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title Effect of Porogenic Agents on Properties of Microporous Mullite Aggregates
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