以四氯化钛、八水合氢氧化钡和氨水为原料,首先制备出氢氧化钛凝胶,然后以乙醇为溶剂,采用两步沉淀法在低温常压下合成了立方相纳米钛酸钡粉体.研究了反应温度、反应物浓度和反应时间对粉体物相和粒径的影响,利用XRD和TEM对粉体进行了表征.实验结果表明,在低于80℃的反应温度下可以制备出粒径＜20nm、结晶性能良好且形貌规则的纳米钛酸钡粉体.此外,以合成的粉体为原料,以热膨胀仪为测试手段,对钛酸钡陶瓷的烧结动力学进行了研究.结果表明,陶瓷的烧结温度为1150～1250℃,在1250℃的烧结温度下保温2h,陶瓷坯体的相对密度约93%,室温介电常数约4020.
参考文献
| [1] | Zeng J M;Lin C L;Li J H et al.[J].Materials Letters,1998,38:112-115. |
| [2] | Andrea Testino;Maria Teresa Buscaglia;Massimo Viviani .Synthesis of BaTiO_3 Particles with Tailored Size by Precipitation from Aqueous Solutions[J].Journal of the American Ceramic Society,2004(1):79-83. |
| [3] | Lu W;Quilitz M;Schmidt H .[J].Journal of Crystal Growth,2007,27(10):3149-3159. |
| [4] | Jai Joon Lee;Kum Jin Park;Kang Heon Hur .Synthesis of Ultrafine and Spherical Barium Titanate Powders Using a Titania Nano-Sol[J].Journal of the American Ceramic Society,2006(10):3299-3301. |
| [5] | 李青莲,陈维,陈寿田,惠春.纳米晶钛酸钡粉体制备及陶瓷烧结性能的研究[J].压电与声光,2000(01):37-39. |
| [6] | Yan T;Liu XL;Wang NR;Chen JF .Synthesis of monodispersed barium titanate nanocrytals - hydrothermal recrystallization of BaTiO3 nanospheres[J].Journal of Crystal Growth,2005(2/4):669-677. |
| [7] | Madona B;Sophie G F;Francois M.[J].Solid-State Ionicis,2005:1301-1309. |
| [8] | 王敦青.溶剂热合成纳米功能材料研究进展[J].德州学院学报,2002(02):61-64. |
| [9] | Jung-Kun Jee;Kug-Sun Hong;Jin-Wook Jang .Roles of Ba/Ti Ratios in the Dielectric Properties of BaTiO_3 Ceramics[J].Journal of the American Ceramic Society,2001(9):2001-2006. |
| [10] | Kutty T R N;Padmini P .[J].Materials Chemistry and Physics,1995,39:200-208. |
| [11] | Kolker A;Pablo J .[J].Industrial and Engineering Chemistry Research,1996,35:228-233. |
| [12] | Robert F .[J].Langmuir,2004,20:2975-2976. |
| [13] | Porat R;Berger S;Rosen A .[J].Nano-Structured Materials,1996,7(04):429-436. |
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