多步法制备纳米钛酸钡  

Fabrication of Nano-Barium Titanate via Multi-step Reactions

作　　者：张晓娟[1] 唐丽华[1] 邱霜阳[2] 贾长英[1] 

机构地区：[1]沈阳工业大学石油化工学院,辽阳111003 [2]中国石油天然气股份有限公司辽阳石化分公司,辽阳111003

出　　处：《无机化学学报》2007年第11期1975-1978,共4页Chinese Journal of Inorganic Chemistry

摘　　要：采用醋酸钡、碳酸钾、钛酸丁酯等为初始反应物,通过多步反应的方法,制得了纳米钛酸钡。所得产品采用XRD、TEM和SEM等进行了表征,并对生长机理进行了分析。研究结果表明,得到的碳酸钡为直径约100nm的纳米棒,再经室温下钛酸丁酯水解产生二氧化钛对碳酸钡纳米棒进行包覆,可得到一维核-壳结构的碳酸钡/二氧化钛,最后于700℃下经固相反应而得到钛酸钡的纳米颗粒。这种制备纳米钛酸钡的方法可以有效地控制产品形貌及粒径。Nano-barium titanate was fabricated by multi-step reactions using barium acetate, potassium carbonate and tetrabutyl titanate as raw materials. The products were characterized by XRD, TEM and SEM, and the formation mechanism of Nano-barium titanate was discussed. Barium carbonate nanorods with an average diameter of about 100 nm were obtained via a surfactant assisted hydrothermal method; then the nanorods were coated with titania by hydrolysis of tetrabutyl titanate to produce a core-shell barium carbonate/titania structure, and finally barium titanate nanoparticles were synthesized by a solid reaction at 700℃. The morphology and particle size distribution of nano-barium titanate could be effectively controlled by this developed method.

关 键 词：钛酸钡 多步反应 一维结构 

分 类 号：O614.23[理学—无机化学]