Sodium tungstate is an inorganic compound of formula Na2WO4 • 2H2O. This white, water-soluble solid is the sodium salt of ortho-tungstic acid. As a raw material for chemical synthesis of tungsten, sodium tungstate is an important intermediate in the conversion of tungsten ore to metal.
Cesium tungsten bronze is a kind of good performance inorganic nano-material which absorbs NIR and has uniform particle size distribution. It possesses strong adsorption function in wavelength of 800-1200nm in the near infrared region and high visible light transmittance with wavelength of 380-780nm.