烧结制度对TiO_2-MgO-MnO_2系α-Al_2O_3陶瓷膜支撑体性能的影响  

The Effect of Sintering System on the Properties of α-Al_2O_3 Ceramic Support with TiO_2-MgO-MnO_2

作　　者：孟锋 同帜[1] MENG Feng;TONG Zhi(Xi’an Polytechnic University,Xi’an 710048,Shaanxi,China)

机构地区：[1]西安工程大学,陕西西安710048

出　　处：《陶瓷学报》2018年第3期287-292,共6页Journal of Ceramics

基　　金：国家自然科学基金资助项目(21103132);陕西省科技厅科技统筹项目(2013KTCQ03~20)

摘　　要：本实验采用挤出成型工艺和固态粒子烧结法制备出单管式α-Al_2O_3陶瓷膜支撑体,研究了烧结制度对TiO_2-MgO-MnO_2系α-Al_2O_3陶瓷管支撑体性能的影响。实验通过SEM、XRD、三点弯曲法、质量损失法、液体静力称重法、自制纯水通量测定装置等方法对α-Al_2O_3陶瓷管支撑体样品的微观形貌、物相组成、机械强度、抗酸碱性、孔隙率、纯水通量等性能进行分析表征。研究结果表明:α-Al_2O_3陶瓷管支撑体的最佳烧结温度为1300℃,此时制备出的支撑体试样孔隙率达到了44.84%、抗折强度为80.21MPa、纯水通量为8979.37L/m^2·h·MPa、酸/碱腐蚀重量损失率仅为0.87%/1.09%。同时最终确定了试样的烧结制度为:在30-200℃、200-350℃、350-800℃、800-1300℃四个温度段内,分别以2℃/min、4℃/min、4℃/min、2℃/min的升温速率匀速升温,分别在350℃、800℃和1300℃下保温30min、60min和120min,烧结完成后自然冷却至室温。In this paper, single-tube α-Al2O3 ceramic support body was prepared by extrusion molding and solid particles sintering. The effect of sintering system on the properties of α-Al2O3 ceramic support with TiO2-MgO-MnO2 was studied. The microstructure, phase composition, mechanical strength, acid and alkali corrosion resistant, porosity and pure water fux of samples were characterized by SEM, XRD, three point bending method, mass loss method, liquid static weighing method, and homemade device for pure water fux. The results show that the optimum sintering temperature of α-Al2O3 ceramic support is 1300 ℃, and the porosity of the prepared sample is 44.84 %, the bending strength is 80.21 MPa, the pure water fux is 8979.37 L/m^2·h·MPa, and the acid / base corrosion weight loss rate is 0.87% / 1.09%. Finally it’s confrmed the suitable sintering system is as follows： heating at a uniform rate of 12 ℃/min, 6 ℃/min, 12 ℃/min, 4 ℃/min respectively in 30-200 ℃, 200-350 ℃, 350-800 ℃, and 800-1200 ℃, and then heat soaking for 30 min, 60 min and 120 min respectively at 350 ℃, 800 ℃ and 1200 ℃, and fnally cooling to room temperature.

关 键 词：α-Al2O3陶瓷膜支撑体 挤出成型工艺 固态粒子烧结法 烧结温度 

分 类 号：TQ174.75[化学工程—陶瓷工业]