ボールミルを利用したYBa_2Cu_3O_<7-x> 超伝導粉末の作製とその焼結体の特性

概要

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The fabrication of ceramics is subject to the variables which are determined to some extent by the processing technique being used. The most common parameters are traditional, synthesis of the powder including purity of the raw materials, particle size distribution, powder reactivity, organic additives and rheology before firing, as well as optimum firing profile and atmosphere. An effort is being made to optimize all the variables to put these materials into commercial use. This article illustrates the processing-property relationships focusing on powder reactivity. The superconducting ceramics of high density, YBa_2Cu_3O_<7-x> was prepared by very careful mixing with small size (1-2 mmΦ) zirconia balls in ethyl-alcohol. The sintered body density of 5.7 g/cm^3 has been obtained by this method. However, T_c depends on the thickness of the polished surface.
1988-04-01