Zn2+对304L不锈钢钝化膜半导体性能的影响目前鲜见报道.利用电容测量法研究了304L不锈钢在一系列ZnSO4浓度溶液中所形成的钝化膜的半导体性能,同时对影响钝化膜半导体性能的因素进行了讨论.考虑SO24-对不锈钢钝化膜的影响,在相同温度和浓度的条件下进行了Na2SO4中的浸泡对比试验.结果表明:在电位小于-0.4 V内,膜呈p型半导体特性,电位处于-0.4~0.3 V内,膜呈n型半导体特性;随着测试温度的升高及Zn2+浓度的增加,Mott-Sclaottky曲线的斜率有增大的趋势,膜内的杂质浓度减小.
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