| 多步法制备纳米钛酸钡 |
| Fabrication of Nano-Barium Titanate via Multi-step Reactions |
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| 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100 nm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。 |
| 关键词: 钛酸钡 多步反应 一维结构 |
| 基金项目: |
| Abstract: 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. |
| Keywords: barium titanate multi-step reactions one-dimensional structure |
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| 张晓娟,唐丽华,邱霜阳,贾长英.多步法制备纳米钛酸钡[J].无机化学学报,2007,23(11):1975-1978. |
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