用四种不同粒径的、全稳定的ZrO2粉料进行了燃料电池电解质厚膜的流延实验．结果表明，流延成膜的最佳料浆组成随粉料粒径有很大变化，随着粉料粒径的减少；所需要的分散剂用量相应增加，同时；所需要的粘结剂与塑性剂用量也必须增加，以确保素坯膜有足够的强度与韧性．此外，料浆粘度对成膜的影响也很大，在所研究的料浆系统中，为了得到好的素坯膜，适中的料浆粘度应控制在400～600mpa·s（剪切速率为350s-1）范围以内．
Zirconia electrolyte membrane for ceramic fuel cell application was fabricated using tape-casting process.Four fully stabilized
zirconia powders with different particle size were used. It comes out that the optimum formulation for tape casting is affected substantially
by powder particle size. With the decrease in particle size , the amount of dispersant needed increases; furthermore, the amount of binder/plasticizer
must be increased so as to devote sufficient strength and flexibility to the green tape for easy handling and storage. The slurry viscosity has an
important effects on tape casting process in order to get a good green tape. The moderate viscosity values for tape casting slips are 400～600 mpa·s
for shear rates up to 350s-1.
参考文献
| [1] | Mistler R E, Shanefield D J, Runk R B. In:Ceramic Processing before Firing. New York, 1978. 411--447 2 Mistler R E. Am. Ceram. Soc. Bull., 1990, 69 (6): 1022--1026 3 Hyatt E P. Am. Ceram. Soc. Bull., 1986, 65 (4): 637--638 4 Minh Nguyen Q. J. Am. Ceram. Soc., 1993, 76 (3): 563--588 5 Raeder H, Simon C. J. Eur. Ceram. Soc., 1994, 13: 485--491 6 Rodrigo Moreno. Am. Ceram. Soc. Bull., 1992, 71 (11): 1647--1656 7 贺连星，温廷琏，吕之奕. 化学通报， 1996 (11): 19--22 |
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