作者：JIN Zhishang1SHAN Zhilin2ZHAO Huizhong1YU Jun1ZHANG Han1

作者单位：1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology2. Guizhou Huaxin New Material Co., Ltd.

刊名：China’s Refractories

ISSN：1004-4493

出版年：2023-09-15

卷：32

期：3

起页：31-35

止页：

分类号：TQ175.712.1

语种：英文

关键词：

内容简介

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; and the thermal conductivity at 500 ℃ is 2.30 W·m-1·K-1.