Piezoelectric porous α-quartz membrane by aqueous gel-casting with enhanced antifouling and mechanical properties

被引:12
作者
Gao, Jinglin [1 ]
Cao, Hongquan [1 ]
Hu, Xiaoyu [1 ]
Mao, Hengyang [1 ,2 ]
Chen, Xianfu [1 ]
Qiu, Minghui [1 ]
Verweij, Hendrik [1 ,3 ]
Fan, Yiqun [1 ]
机构
[1] Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 South Puzhu Rd, Nanjing 211816, Peoples R China
[2] Huaiyin Normal Univ, Sch Chem & Chem Engn, Jiangsu Engn Lab Environm Funct Mat, Jiangsu Key Lab Chem Low Dimens Mat, 111 Changjiang Rd, Huaian 223300, Peoples R China
[3] Ohio State Univ, Coll Engn, Dept Mat Sci & Engn, 2041 N Coll Rd, Columbus, OH 43210 USA
基金
中国国家自然科学基金;
关键词
alpha-quartz; Gel-casting; Lead-free piezoelectric; Ceramic membrane; Membrane fouling; PHASE-TRANSITION; FOULING MECHANISM; CERAMICS; TEMPERATURE; PERFORMANCE; FABRICATION; ULTRASOUND; ADDITIVES; SIZE;
D O I
10.1016/j.jeurceramsoc.2022.09.038
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Porous alpha-quartz ceramics with improved mechanical strength were fabricated by using silica sol as a bonding agent in an aqueous gel-casting process. alpha-quartz dispersion was prepared with a solid load of 75 wt% and a viscosity of 1.66 Pa.s. alpha-Al2O3 particles were added to promote dispersion of the bonding agent. The optimum amounts of amorphous silica and alpha-Al2O3 were 10 % and 8 % of the mass of alpha-quartz powder, respectively. The thermal treatment of alpha-quartz green bodies was optimized for mechanical and permeation properties. Electrical fields up to 1 kV/mm were applied to the green bodies to accomplish alpha-quartz grains orientation and hence piezoelectric response. This caused an increase of piezo-acoustic response by 58 % at an excitation frequency of 200 kHz. In-situ mitigation of fouling was obtained by applying an alternating voltage of 60 V, during TiO2 suspension filtration, which resulted in an increase of the stationary flux by 23 %.
引用
收藏
页码:109 / 120
页数:12
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