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首页> 外文期刊>Materials Science and Engineering. B, Solid-State Materials for Advanced Technology >Oxygen permeability of perovskite-type Y_(1-x)M_xBa_2Cu_3O_(7-δ) (M = La, Ca) membranes
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Oxygen permeability of perovskite-type Y_(1-x)M_xBa_2Cu_3O_(7-δ) (M = La, Ca) membranes

机译：钙钛矿型Y_（1-x）M_xBa_2Cu_3O_（7-δ）（M = La，Ca）膜的透氧性

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摘要

Oxygen permeability of dense perovskite-type Y_(1-x)La_xBa_2Cu_3O_(7-δ) (x = 0.1, 0.3, 0.5, 0.8 and 1.0) and Y_(1-y)Ca_yBa_2Cu_3O_(7-δ) (y = 0.1, 0.2, 0.3 and 0.4) membranes were investigated under an air/He gradient in a temperature range from 750 to 950℃. The results indicate that doping of La or Ca has great effects on the oxygen permeability. Oxygen permeation flux of Y_(1-x)M_xBa_2Cu_3O_(7-δ) (M = La, Ca) membrane increases with M substitution for Y in YBa_2Cu_3O_(7-δ), and has an obvious increase at about 900℃ due to an order-disorder transition of the oxygen vacancies in the membrane material. Maximum oxygen fluxes of 0.92 and 0.77 μmol/s cm~2 are obtained for LaBa_2Cu_3O_(7-δ) (x = 1.0) and Y_(0.8)Ca_(0.2)Ba_2Cu_3O_(7-δ) (y = 0.2) membranes with thickness 1.0mm at 950℃, respectively.
机译：致密钙钛矿型Y_（1-x）La_xBa_2Cu_3O_（7-δ）（x = 0.1、0.3、0.5、0.8和1.0）和Y_（1-y）Ca_yBa_2Cu_3O_（7-δ）（y = 0.1，在空气/氦气梯度下，在750至950℃的温度范围内研究了0.2、0.3和0.4）膜。结果表明，La或Ca的掺杂对透氧性有很大影响。 Y_（1-x）M_xBa_2Cu_3O_（7-δ）（M = La，Ca）膜的氧渗透通量随着YBa_2Cu_3O_（7-δ）中的Y的置换而增加，并且在大约900℃时由于膜材料中氧空位的有序-无序转变。厚度为LaBa_2Cu_3O_（7-δ）（x = 1.0）和Y_（0.8）Ca_（0.2）Ba_2Cu_3O_（7-δ）（y = 0.2）的膜的最大氧通量为0.92和0.77μmol/ s cm〜2在950℃时分别为1.0mm。

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