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利用溶胶-凝胶提拉技术在低阻硅衬底上以钛酸铅(PT)作缓冲层,成功地制备了锆钛酸铅(PZT)高介电常数介质膜,其锆钛组分比为4 5∶5 5 .研究了薄膜结晶状态与制备条件的关系及相应的介电、铁电特性.结果表明,用这种方法制备的PZT薄膜在80 0℃退火1 5 m in晶化已相当完善,以(1 1 0 )为择优取向;这些样品的结晶尺度根据衍射峰的半高宽估计为1 4~2 5 nm左右;采用Sawyer- Tower电路和L CR电桥测试法获得的结果表明,经过80 0℃退火1 5 min的PZT样品,其剩余极化强度为4 7.7μC/ cm2 ,矫顽场强为1 8k V/ cm,介电常数为1 5 8,损耗因子为0 .0 4~0 .0 5 5 相似文献
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1 INTRODUCTIONI mpinging jet (IJ) , with high heat and masstransfer rates have been widely usedin a number ofindustrial areas ranging from thermal drying ofcontinuous sheets , production of foodstuffs toelectronic component cooling, annealing of metalsheets ,tempering of glass ,and cooling of turbinevanes . Over the past 30 years , experi mental andnumerical investigations of flow and heat transfercharacteristics with single or multiple jets havebeen a very hot research field. Due to the … 相似文献