Sandwich structure and manufacturing method of sandwich structure

Abstract

A sandwich structure comprising: a first glass substrate, a first layer, a second layer, a third layer, and a second glass substrate, wherein the first layer comprises a crystalline tungsten oxide represented by the general formula WO3-x (0≤x≤0.28), the second layer comprises tungsten bronze, and the third layer comprises one or more compounds selected from the group consisting of SiO2, TiO2, WO3, Nb2O5, Al2O3, ZrO2, Ta2O5, SnO2, Si3N4, LaB6, and TiN, and the sandwich structure is arranged in the order of the first layer, the second layer, the third layer, and the second glass substrate, starting from the position closest to the first glass substrate. none

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