采用溶胶-凝胶工艺制备了Ba0.65Sr0.35TiO3粉体,并利用微波烧结技术对粉体进行了合成和烧结,研究分析了样品的介电特性,并与传统制备工艺获得的样品进行了性能比较.实验结果表明,获得的Ba0.65Sr0.35TiO3粉体颗粒较细,其合成温度和烧结成瓷温度都较传统工艺有大幅度降低,分别为900和1310℃;可以获得晶粒尺寸在1μm以内的陶瓷;随晶粒的减小,材料的相对介电常数变化不大,而介电损耗大大降低.
Ba0.65Sr0.35TiO3 materials were prepared by sol-gel processing and microwave sintering, their dielectric properties were studied and compared with
the same compositional material prepared by conventional processing. The results show that the synthetic temperature of the BST powder can be reduced from 1100℃ to 900℃, and the BST ceramic with fine grain (～1μm) can be obtained
by microwave sintering at 1310℃ for 25 minutes. With the decreasing of grain size, the relative dielectric constant of the samples changes slightly and
the dielectric loss reduces greatly. The decrease of dielectric loss is attributed to the presence of an internal stress in the fine-grained BST ceramics.
参考文献
| [1] | Lee B W, Auh K H. J. Mater. Res., 1995, 10 (6): 1483--1487. [2] 曾华荣, 瞿翠风, 等(Zeng Hua-Rong, et al). 无机材料学报(Journal Inorganic Materials), 1999, 14 (1): 101--107. [3] Kinoshita K, Yamaji A. J. Appl. Phys., 1976, 47 (1): 371--373. [4] Bell A J, Moulson A J, Cross L E. Ferroelectrics, 1984, 54: 147--150. [5] Arlt G, Hennings D, With G de. J. Appl. Phys., 1985, 58 (4): 1619--1625. [6] Rhim S M, Hong S, et al. J. Am. Ceram. Soc., 2000, 83 (5): 1145--1148. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%