烧结助剂MgO-Al2O3-SiO2-ZrO2提高管式支撑体的耐碱腐蚀性能研究

doi:10.11896/cldb.23040042

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Abstract Sintering aids can reduce the sintering temperature and realize the low-cost fabrication of Al₂O₃ ceramic membrane, however, it will affect the alkali corrosion resistance of Al₂O₃ support. In this work, the high alumina tubular support was fabricated by extrusion forming, sintered at 1 600 ℃, using MgO-Al₂O₃-SiO₂-ZrO₂ as sintering aids and its alkali corrosion resistance was researched. The results show that the flower-like crystal of MgAl₂O₄ in the alumina surface is exposed due to the corrosion of the glass phase in the sintering aids by the alkali solution at high temperature, meanwhile, the ZrSiO₄ is still nailed on the surface and neck of the alumina particle, those crystals provide good alkali corrosion resis-tance for the support. The attenuation relationship of the support bending strength under the static corrosion conforms to the horizontal asymptotic equation, the bending strength infinitely close to 51.94 MPa under long-term corrosion. The bending strength of pure alumina support sintered at 1 680 ℃ is only 33.78 MPa after dynamic corrosion for 36 h with a membrane surface velocity of 4.32 m/s of alkali solution at 50 ℃, while the high alumina support in this work is still 73.06 MPa, which realizes the preparation of the high aluminum tubular support with great alkali corrosion resistance at low temperature.

Key words： sintering aids alumina tubular support alkali corrosion low-cost

Published: Online: 2023-09-06

CLC number:

TQ174

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	Articles by authors
	YANG Ruiqiang
	WANG Yongqing
	CHANG Qibing
	ZHOU Jian'er

Cite this article:

YANG Ruiqiang,WANG Yongqing,CHANG Qibing, et al. Investigation of Improving the Alkali Corrosion Resistance of Tubular Support Using MgO-Al₂O₃-SiO₂-ZrO₂ as Sintering Aids[J]. Materials Reports, 2023, 37(S1): 23040042-9.

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http://www.mater-rep.com/EN/10.11896/cldb.23040042 OR http://www.mater-rep.com/EN/Y2023/V37/IS1/23040042

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