采用wolframite前驱物法制备了Pb(Sc1/2Nb1/2)O3陶瓷。通过调节陶瓷烧结工艺,获得了三种具有不同B位离子有序度的PSN陶瓷。测量了三种陶瓷样品在室温至160℃范围内的Raman光谱随温度变化。结果表明,随着温度的升高,三种不同B位有序度的陶瓷样品中,Raman光谱中位于530cm^-1。的F2g模的峰位和半峰宽分别在100℃,85℃和80℃发生了突变,表明陶瓷分别在100℃,85℃和80℃三个温度点发生了铁电-顺电相变。上述结论得到了介电温度谱测量数据的支持。
A wolframite precursor method was used to prepare the Pb(Sc1/2Nb1/2)O3 ceramic. Three different Pb(SC1/2Nb1/2)O3 ceramic samples characterized with varied chemical ordering on the B site ions were produced by modifying the annealing treatment. Raman spectra of three different samples are measured from room temperature to 160℃. A ferroelelctric - paraelectric phase transition was observed for three ceramic samples at about 100℃, 85℃ and 80℃, respectively. This conclusion is supported by the dielectric measurement of these ceramic samples.