采用熔盐法合成了纯的 系层状结构的ＳｒＢｉ２Ｔａ２Ｏ９粉体．采用ＸＲＤ和ＳＥＭ等手段对粉体的结构和形态进行了分析，并与固相法进行了比较，结果表明熔盐法所得粉体形状呈片状，无团聚现象．对影响粉体颗粒尺寸和形状的因素进行了考查，并对熔盐法合成ＳｒＢｉ２Ｔａ２Ｏ９粉体的机理进行了讨论．
The purely stoichiometric SrBi2Ta2O9 powder was successfully prepared by a molten salt method using Bi2O3, SrCO3 and Ta2O3 as raw materials and
a mixture of NaCl and KCl added. The crystal structure and morphology of the powder were characterized by X-ray diffraction and scanning electron microscope. The
XRD patterns reveal that single phase SrBi2Ta2O9 powder can be obtained by the molten salt method, and the SEM photographs show that the powder has a high
degree of shape anisotropy. The effect of reacting temperature on phase formation and particle size was reported. Further more the mechanism of molten salt technique was briefly discussed.
参考文献
| [1] | Arendt R H. J. Solid State Chem. 1973, 8(4): 339--347. [2] Yoon K H, Cho Y S, Lee D H, et al. J. Am. Ceram. Soc. 1993, 76: 1373--1376. [3] Nagata K, Okazaki K. Jpn. J. Appl. Phys. 1985, 24: 812--814. [4] Arendt R H, Rosolowski Z H, Szymaszek J W. Mater. Res. Bull. 1979, 14: 703--709. [5] Yoon K H, Cho Y S, Kang D H. J. Mater. Sci. 1998, 33: 2977--2984. [6] Frit B, Mercurio J P. Journal of Alloys and Compounds 1992, 188: 27--35. [7] Subbarao E C. J. Phys. Chem. Solids, 1962, 23: 665--676. [8] Holmes Michael, Newnham Robert E, Cross Leslie E. American Ceramic Society Bulletin, 1979, 58: 872. [9] Lin Sheng-He, Swartz S L, Schulze W A, et al. J. Am. Ceram. Soc., 1983, 66: 881--884. [10] Du Xiaofeng, Chen I-Wei. J. Am. Ceram. Soc., 1998, 81: 3260--3264. [11] Hayashi Y, Kimura T, Yamaguchi T. Am. Ceram. Soc. Bull., 1985, 64: 1249--1252. [12] 蔡君威，王聪秀. 化学世界, 1993, 34(12): 616--618. [13] Li C, Chiu C, Desu S B. J. Am. Ceram. Soc., 1991, 74: 42--47. [14] Cahn J W. On the Morphological Stability of Growing Crystaks. In: Peiser H S, ed. Crystal Growth. Oxford, U. K: Pergamon Press Ltd. 1967. 681--690. [15] Ardell J. Acta Metall., 1972, 20(1): 61--71. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%