颗粒
材料科学
结晶
分析化学(期刊)
活化能
电阻率和电导率
溶胶凝胶
电介质
金属
电导率
衍射
相(物质)
水解
矿物学
化学工程
复合材料
冶金
物理化学
色谱法
纳米技术
化学
有机化学
光学
物理
电气工程
光电子学
工程类
作者
Sabrina Sartori,Alessandro Martucci,A. Muffato,Massimo Guglielmi
标识
DOI:10.1016/s0955-2219(03)00513-2
摘要
Powders of general formula Na1+xAl11O17+x/2 with x=0, 0.2 and 0.57 have been obtained by hydrolysis and condensation of metal alkoxides. X-ray diffraction investigations showed the crystallization of β-alumina peaks at 1100 °C, confirmed by DTA/TG measurements. The same phase was revealed for pellets sintered in air at 1400 °C. Densities up to 97% of the theoretical value were reached. Electrical performances of pellets of x=0.2 and 0.57 compositions were investigated by Dielectric Analyzer (DEA) at various frequencies. The measured values confirmed the good conductivity and activation energy performances of the material.
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