摘要：以钛酸四丁脂、醋酸钡、醋酸镧为原料 ,采用溶胶 -凝胶法制备了掺杂镧BaTiO₃ 基超细微粉 ,利用DTA、XRD、SEM等测试手段对超细微粉进行了表征。根据Scherrer计算可知 ,超细微粉的粒径在40nm左右

关键词： 溶胶-凝胶法;钛酸钡;纳米晶粉体

Abstract: BaTiO₃-based ultra-fine powders doped by lanthanium is prepared by sol－gel process using tetrathoxysilance（TEOS）， Mg（NO₃） ₂·6H₂O and Al（NO₃） ₃·9H₂O as raw materials． The structure and compositions of the Ultra-fine powders are characterized by XRD，DTA and SEM．The partical sizes are determined to be 40 nm using Scherrer’s formula． 

Keywords:sol－gel process；BaTiO₃；nano-powders