WU Shenghong ¹ ,XU Yixi ² ,LI Yanjie ²

(1. Longkey Electronics Co., Ltd., Dongguan 523325; 2. School of Materials Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021)

Abstract: Bi₄Ti₃O₁₂ powder was prepared by molten salt method. The influences of calcining temperature and addition amount of salt on micro-morphology were investigated. The results show that grain shape of Bi₄Ti₃O₁₂ is regular platelike quadrilateral;gain dimension significantly increases with calcining temperature increasing, obviously orientation growth in a-b plane; grain size is homogenous distributed, between 6～8μm when the mass ratio between salt and raw material is 1 ∶1; grain growth follows Ostwald ripening mechanism.

Keywords: lead-free ferroelectric and piezoelectric materials, Bi₄Ti₃O₁₂, molten salt method, microscopic morphology Received on.