以氧氯化锆为前驱体,采用溶胶-凝胶法快速制备锆溶胶,凝胶后经煅烧制得氧化锆粉体,分析了锆溶胶的制备、稳定和氧化锆粉体的特性.结果表明:随着H2O2与ZrOCl2·8H2O摩尔数的比值m的增大,锆溶胶形成所需的pH值也逐渐增大;m为4～6,且pH值为3～4.5时,所得的溶胶最稳定;随m值的增大,凝胶干燥后氧化锆粉体粒径减小,分布变窄;m为4时,氧化锆粉体的平均粒径为21.4 μm.粉体在450℃热处理时有四方相ZrO2析出,随着温度升高,四方相ZrO2结晶趋于完整,并开始析出少量单斜相;900℃时亚稳态四方相大部分转化成单斜相;1 020℃时转变完成,此时得到粉体粒径在100 nm左右.
参考文献
| [1] | Minh N Q .Ceramic fuel cells[J].Journal of the American Ceramic Society,1993,76(03):562-580. |
| [2] | 周玉.陶瓷材料学[M].哈尔滨:哈尔滨工业大学出版社,1995:263-270. |
| [3] | Liu W.;Flytzanistephanopoulos M. .TOTAL OXIDATION OF CARBON MONOXIDE AND METHANE OVER TRANSITION METAL-FLUORITE OXIDE COMPOSITE CATALYSTS .1. CATALYST COMPOSITION AND ACTIVITY[J].Journal of Catalysis,1995(2):304-316. |
| [4] | Kuo DH.;Chien CH.;Huang CH. .Zirconia and zirconia-silica thin films deposited by magnetron sputtering[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2002(0):47-53. |
| [5] | Dodd A C;McCormick P G .Synthesis of nano-crystalline ZrO2 powders is by mechanchemical reaction of ZrCl4 with LiOH[J].Journal of the European Ceramic Society,2002,22:1823-1829. |
| [6] | Yi Z;Lee S W;Gao L .Atmospheric plasrnasprayed contings of nanostructured zirconia[J].Journal of the European Ceramic Society,2002,22:347-351. |
| [7] | 章天金;彭芳明 .溶胶-凝胶工艺合成ZrO2超微粉末的研究[J].无机材料学报,1996,11(03):435-440. |
| [8] | Stefanic G.;Music S.;Popovic S. .INFLUENCE OF PH ON THE HYDROTHERMAL CRYSTALLIZATION KINETICS AND CRYSTAL STRUCTURE OF ZRO2[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,1997(1):31-39. |
| [9] | Moon Y T;Kim D K;Kin C H .Preparation of monodiesperse ZrO2 by the microwave heating of zirconyl chloride solution[J].Journal of the American Ceramic Society,1995,78(04):103-106. |
| [10] | 唐勋海,顾华志,汪厚植,张文杰.氯氧化锆前驱体制备纳米氧化锆的机理探讨[J].无机盐工业,2004(03):14-15,55. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%