| sol-gel法制备Ba_(3.99)Sm_(9.34)Ti_(18)O_(54)微波介质陶瓷 |
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| 引用本文： | 李兆喜,沈春英,丘泰.sol-gel法制备Ba_(3.99)Sm_(9.34)Ti_(18)O_(54)微波介质陶瓷[J].电子元件与材料,2010,29(2). |
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| 作者姓名： | 李兆喜 沈春英 丘泰 |
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| 作者单位： | 南京工业大学,材料科学与工程学院,江苏,南京,210009 |
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| 摘 要： | 以柠檬酸为络合剂,通过sol-gel法制备了Ba3.99Sm9.34Ti18O54陶瓷前驱体;经1100℃预烧2h压片成型后,再在1300℃保温3h,即得到了烧结致密的陶瓷样品。与传统固相法相比,其烧结温度降低了50℃,且陶瓷晶粒细小,晶粒分布均匀,具有更加优良的微波介电性能:εr=79.56,Q·f=9636GHz(4.71GHz),τf=–1.23×10–6/℃。
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| 关 键 词： | 微波介质陶瓷 BaO-Sm2O3-TiO2 sol-gel法 柠檬酸 微波介电性能 |
Preparation of Ba_(3.99)Sm_(9.34)Ti_(18)O_(54) microwave dielectric ceramics by sol-gel method |
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| LI Zhaoxi,SHEN Chunying,QIU Tai.Preparation of Ba_(3.99)Sm_(9.34)Ti_(18)O_(54) microwave dielectric ceramics by sol-gel method[J].Electronic Components & Materials,2010,29(2). |
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| Authors: | LI Zhaoxi SHEN Chunying QIU Tai |
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| Affiliation: | College of Material Science and Engineering;Nanjing University of Technology;Nanjing 210009;China |
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| Abstract: | Ba_(3.99)Sm_(9.34)Ti_(18)O_(54) ceramic precursor was prepared by sol-gel method with citric acid as the chelating agent.The precursor was calcined for 2 h at 1 100 ℃ and then pressed into disc.After sintering the disc at 1 300 ℃ for 3 h, high density Ba_(3.99)Sm_(9.34)Ti_(18)O_(54) ceramic was obtained.In comparison with Ba_(3.99)Sm_(9.34)Ti_(18)O_(54) ceramic prepared by traditional solid-state method, the ceramic prepared by sol-gel method shows a 50 ℃ lower sintering temperature, uniformly distributed fine grains, and more excellent microwave dielectric properties with ε_r = 79.56, Q·f = 9 636 GHz (at 4.71 GHz) and τ_f = -1.23×10~(-6)/ ℃. |
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| Keywords: | microwave dielectric ceramic BaO-Sm2O3-TiO2 sol-gel method citric acid microwave dielectric properties |
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