用固相反应法制备了BaTi1-xSnxO3(0.15≤x≤0.30)系铁电陶瓷.研究了它们的介电常数与温度和频率的关系,发现BaTi1-xSnxO3经历了一个由单纯相变弥散铁电体到弛豫型铁电体的变化过程.数据分析表明,BaTi1-xSnxO3系铁电材料是否出现介电弛豫与最大介电常数值对应的温度Tm以上一段温度区间内的介电弥散程度存在对应关系.研究还发现,将交变测量电压由1 Vrms提高到20 Vrms时,可以使BaTi1-xSnxO3陶瓷的Tm向低温方向移动.
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