BaFe_(12)O_(19)/BaTiO_3复合材料的制备及微波性能

稀有金属材料与工程, 2009, 38(z2): 483-486.

BaFe_(12)O_(19)/BaTiO_3复合材料的制备及微波性能

王洪全 ^1, , 廖家轩 ^2, , 潘笑风 ^3, , 傅向军 ^4, , 张佳 ^5, , 魏雄邦 ^6,

1.电子科技大学,四川,成都,610054

2.电子科技大学,四川,成都,610054

3.电子科技大学,四川,成都,610054

4.电子科技大学,四川,成都,610054

5.电子科技大学,四川,成都,610054

6.电子科技大学,四川,成都,610054

基金项目: 电子科技大学中青年学术带头人培养计划(No:Y02018023601053) 四川省应用基础研究(2008JY0057) 高等学校博士学科点专项科研基金(20060614021)

关键词：溶胶-凝胶 , 复合 , 钡铁氧体 , 钛酸钡 , 吸波性能

Preparation and Microwave-Absorption Properties of BaFe_(12)O_(19)/BaTiO_3 Composite

Wang Hongquan ^1, , Liao Jiaxuan ^2, , Pan Xiaofeng ^3, , Fu Xiangjun ^4, , Zhang Jia ^5, , Wei Xiongbang ^6,

1.电子科技大学,四川,成都,610054

2.电子科技大学,四川,成都,610054

3.电子科技大学,四川,成都,610054

4.电子科技大学,四川,成都,610054

5.电子科技大学,四川,成都,610054

6.电子科技大学,四川,成都,610054

Keywords： sol-gel , composite , barium ferrites , barium titanate , microwave absorption properties

采用溶胶凝胶法制备了钛酸钡(BaTiO_3, BTO)和钡铁氧体(BaFe_(12)O_(19), BFO)复合粉体.研究了该粉体的结晶情况、相结构、形貌及吸波性能.XRD结果表明,复合粉体的相结构与BFO粉体的相结构接近,但与BTO含量和烧结温度密切相关.SEM结果表明,复合粉体由微米晶粒和纳米晶粒组成,随着烧结温度的升高颗粒尺寸增大.吸波性能测试表明,粉体在500 MHz～18 GHz频率范围有多个吸收峰,BTO的加入明显改善了材料的吸波性能.

BaFe_(12)O_(19)/BaTiO_3 (BFO/BTO) composite powder was prepared by Sol-gel method. Crystallization, phase structure, morphologies and microwave absorption properties of the composite powder were studied. X-ray diffraction shows that the composite powder is near to BFO powder in phase structure, which is closely associated with the content of BTO and the sintering temperature. SEM analysis exhibits that the composite powder is composed of micro-crystals and nano-crystals. The crystal size increases with increasing sintering temperature. There are several microwave absorption peaks in the range of 500MHz and 18GHz, which shows the microwave absorption properties were improved significantly.

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