Stainless steel substrate for solar cell having superior insulating properties and low thermal expansion coefficient and method of producing the same
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United States of America Patent
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Dec 5, 2017
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app pub date -
May 2, 2014
filing date -
May 10, 2013
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Abstract
Provided is a stainless steel substrate for a solar cell, the stainless steel substrate including, by mass %, Cr: 9% to 25%, C: 0.03% or less, Mn: 2% or less, P: 0.05% or less, S: 0.01% or less, N: 0.03% or less, Al: 0.005% to 5.0%, Si: 0.05% to 4.0%, and a remainder including Fe and unavoidable impurities, in which an oxide film containing (i) Al2O3 in an amount of 50% or more or containing (i) Al2O3 and (ii) SiO2 in a total amount of 50% or more is formed on a surface of stainless steel having a composition which contains Al: 0.5% or more and/or Si: 0.4% or more and satisfies the following expression (1).
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