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碲化铋 Bismuth telluride (Bi2Te3)

Bismuth telluride (Bi2Te3) is a gray powder that is a compound of bismuth and tellurium also known as bismuth(III) telluride. It is a semiconductor, which, when alloyed with antimony or selenium, is an efficient thermoelectric material for refrigeration or portable power generation. Bi2Te3 is a topological insulator, and thus exhibits thickness-dependent physical properties.

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https://en.wikipedia.org/wiki/Bismuth_telluride

https://zh.wikipedia.org/wiki/碲化鉍

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