Synthesis of High-Aspect-Ratio BaTiO3 Platelets by Topochemical Conversion and Fabrication of Textured Pb(Mg1/3Nb2/3)O3-32.5PbTiO3 Ceramics

Bulletin of the Korean chemical society

Heping Zhou¹  Zhifeng Liu¹  Wei Zhao¹  Jing Ya¹  Lei E¹ 

关键词: Grain growth;    Topochemical microcrystal conversion;    Piezoelectric properties;    Perovskites;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Perovskite structured barium titanate particles (BaTiO3) platelets were synthesized by molten salt synthesis and topochemical microcrystal conversion. As the precursors of BaTiO3, plate-like BaBi4Ti4O15 particles were first synthesized by the reaction of Bi4Ti3O12, BaCO3, and TiO2 at 1080 °C for 3 h in BaCl2-KCl molten salt. After the topochemical reactions, layer-structured BaBi4Ti4O15 particles transformed to the perovskite BaTiO3 platelets. BaTiO3 particles with thickness of approximately 0.5 μm and a length of 10-15 μm retained the morphology feature of the BaBi4Ti4O15 precursor. For <001> Pb(Mg1/3Nb2/3)O3-32.5PbTiO3 (PMNT)-5 wt % PbO piezoelectric ceramics textured with 5 vol % of BaTiO3 templates, the Lotgering factor reached 0.82, and d33 was 870 pC/N.

【 授权许可】

Unknown