Investigation of Improving the Alkali Corrosion Resistance of Tubular Support Using MgO-Al2O3-SiO2-ZrO2 as Sintering Aids
YANG Ruiqiang1, WANG Yongqing1,2,*, CHANG Qibing1,2, ZHOU Jian'er1,2
1 School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen 333403, Jiangxi, China 2 Key Laboratory of Jiangxi Universities of Inorganic membrane, Jingdezhen 333001, Jiangxi, China
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.
杨瑞强, 汪永清, 常启兵, 周健儿. 烧结助剂MgO-Al2O3-SiO2-ZrO2提高管式支撑体的耐碱腐蚀性能研究[J]. 材料导报, 2023, 37(S1): 23040042-9.
YANG Ruiqiang, WANG Yongqing, CHANG Qibing, ZHOU Jian'er. Investigation of Improving the Alkali Corrosion Resistance of Tubular Support Using MgO-Al2O3-SiO2-ZrO2 as Sintering Aids. Materials Reports, 2023, 37(S1): 23040042-9.
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