Pb(Mg1/3Nb2/3)O3 ceramics produced by modified two-stage calcination process

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机构：
[1] Liou, Yi-Cheng
[2] Wu, Long
[3] Liou, Shyh-Shan
来源：
Liou, Yi-Cheng | 1600年 / 33期
关键词：
Calcination - Dielectric properties of solids - Grain size and shape - Lead compounds - Niobium compounds - Scanning electron microscopy - Sintering - Thermal effects - X ray analysis;
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摘要：
Pyrochlore-free lead magnesium niobate ceramics produced by a modified two-stage calcination process are studied. One calcination step of the two-stage calcination process was omitted in this method. Without calcining, columbite MgNb2O6 and PbO were sintered directly to form pyrochlore-free and dense Pb(Mg1/3Nb2/3)O3 ceramics. The grain size is about 6 μm and the dielectric constant reaches 17000 at -9 °C under 1 kHz. An increase in sintering temperature resulted in an increase in maximum dielectric constant.
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