Effect of Addition Amount of Mullite Sols on Property of Corundum Castable

HOU Qingdong; LUO Xudong; XIE Zhipeng; YU Min; YANG Mengmeng

doi:10.11973/jxgccl201806017

Materials and Mechanical Engineering > 2018 > 42(6): 83-86. > DOI: 10.11973/jxgccl201806017

HOU Qingdong, LUO Xudong, XIE Zhipeng, YU Min, YANG Mengmeng. Effect of Addition Amount of Mullite Sols on Property of Corundum Castable[J]. Materials and Mechanical Engineering, 2018, 42(6): 83-86. DOI: 10.11973/jxgccl201806017

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Effect of Addition Amount of Mullite Sols on Property of Corundum Castable

1. School of High Temperature Materials and Magnesium Resource Engineering, University of Science and Technology Liaoning, Anshan 114051, China;
2. State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

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Received Date: July 30, 2017
Revised Date: March 06, 2018

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With the mullite sols prepared by coprecipitation method as a binder, the corundum castable was sintered at different temperatures (1 100,1 300,1 500℃). The effects of addition amount of mullite sols on the phase composition, sintering performance, compressive strength at ambient temperature and microstructure of the corundum castables were studied. The results show that with the increase of mullite sols addition amount, the bulk density of the sample first increased and then decreased; the apparent porosity first decreased and then increased. The phase composition of the sample mainly consisted of corundum phase and mullite phase. With the increase of sintering temperature and addition amount of mullite sols, the content of mullite phase increased; the compressive strength at ambient temperature of the sample was improved. When the mass fraction of mullite sols was 3%, the compressive strength at ambient temperature of the sample sintered at 1 500℃ was the largest.
- sintering property,
- corundum castable,
- mullite sol,
- coprecipitation method

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