采用溶胶-凝胶法在醋酸溶液体系中制备了未掺杂和掺Mn的钛酸锶钡的凝胶和粉末,采用DSC和XRD研究了Mn掺杂对Ba0.7Sr0.3Ti1-xMnxO3(BST)热演变及相组成的影响.结果表明:Mn掺杂强烈影响BST体系的热演变过程特别是晶化过程,由未掺杂BST体系的双相变过程逐渐变成单相变过程:在相旧热经历状况下,Mn掺杂BST体系的晶化反应充分完全,BST相结晶性良好;Mn掺杂增大BST晶体(110)晶面间距并细化晶粒尺寸.掺Mn(x=0.10)的BST体系经210～340℃热解2.5h,750℃晶化退火0.5h后可以得到单一的BST相.
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