不同摩尔比Al2O3-ZrO2复合薄膜的性能探究 |
作者:王佳悦,同帜,高婷婷,刘婷 |
单位: 西安工程大学,环境与化学工程学院,西安 710048 |
关键词: Al2O3;ZrO2;Al2O3-ZrO2复合膜;粘度;晶相变化 |
出版年,卷(期):页码: 2018,38(6):84-89 |
摘要: |
采用氧化铝(Al2O3)溶胶和氧化锆(ZrO2)溶胶的不同摩尔比(r),通过溶胶-凝胶法制备Al2O3-ZrO2复合薄膜,用乌氏粘度计、热重分析仪(TG-DTG)、红外光谱仪(FTIR)、X射线衍射仪(XRD)、扫描电镜(SEM)、比表面积和孔结构分析仪及激光粒度仪对复合膜的粘度、热稳定性、晶相组成、表面形貌、比表面积和孔结构及粒度大小进行表征分析。结果表明:复合溶胶的摩尔比是影响Al2O3-ZrO2复合溶胶粘度和薄膜开裂的重要因素,随着r值的增大,复合膜的粘度减小,开裂度逐渐减缓;r=1的复合溶胶澄清透明,且在干燥后几乎无开裂,粘度为2.64 mPa·s;800 ℃热处理后,r=1的Al2O3-ZrO2复合膜热稳定性良好,结构致密,孔径分布窄,晶粒尺寸为31.30 nm,其比表面积、平均孔径分别为84.98m2/g、9.75 nm。 |
Using Al2O3 sol and ZrO2 sol with different molar ratio(r),Al2O3-ZrO2 composite membranes were prepared by sol-gel method.The results of the characterized analysis which use testing instruments such as Ukrainian viscosity,thermogravimetric(TG-DTG),Fourier transform infrared(FT-IR),X-ray diffraction(XRD),scanning electron microscope(SEM),nitrogen adsorption-desorption method to analyze thermal stability,crystal phases,surface morphology,specific surface area and pore structures of Al2O3-ZrO2 composite membranes demonstrate that:lake this,the composite sol of different molar ratio is an important factor affecting the viscosity of Al2O3-ZrO2 composite sol,with the increase of r,the viscosity of the composite sol decreases and the cracking degree decreases gradually;At the same heat treatment temperature of 800 ℃,the main crystal phase is t-ZrO2 and Al2O3 sol content in the composite membranes inhibited the crystallization and transparency of ZrO2 grains;When composite sol of r=1,the Al2O3-ZrO2 Composite sol is clear and transparent as well as it’s no cracking after drying,the viscosity was 2.65 mPa·s.The prepared Al2O3-ZrO2 composite membrane had a good thermal stability,compact structure,narrow pore size distribution,the grain size is 31.30 nm.The specific surface area and average pore diameter are 84.98 m2/g and 9.75 nm respectively. |
第一作者个人简介:王佳悦(1995-),女,陕西西安人,研究生在读,从事环保新材料的应用研究。电子信箱Email:981084326@qq.com。通讯作者,E-mail:1018915428@qq.com |
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