Like nano-sodium tungstate (Na2WO4), nano-cesium tungstate is also an inorganic substance composed of transition metal tungsten elements, alkali metal elements and non-metallic oxygen elements. It means that at least one dimension in the three-dimensional space is at the nanometer level (1 -100nm) materials, the particle size is generally below 100 nanometers, because of its good thermodynamic, chemical and optical properties, it is widely used as a thermal insulation agent in architectural glass, automotive film, greenhouse, thermal insulation coating and other industries.
Nano-cesium tungstate, also known as nano-cesium tungsten oxide, is a compound composed of active metal ions (cesium ions, Cs+) and acid ions (tungstate ions, (WO4)2-). It is a typical tungstic acid Salt is a new heat insulation material discovered in recent years. Its English name is Nano Cesium Tungstate, its chemical formula is Cs2WO4, its molecular weight is 513.65, and its CAS is 13587-19-4.
In terms of structure, when the temperature rises to 536 ° C, the phase transition of nano cesium tungstate occurs, from orthorhombic crystal to hexagonal crystal.
The appearance of nano cesium tungstate is dark blue powder, odorless, non-radioactive, soluble in water, acidic and alkaline solutions, with large specific surface area, good dispersibility, excellent thermal stability, high visible light Transmittance, strong near-infrared and ultraviolet absorption capabilities. The production methods of nano-cesium tungstate powder include high-temperature solid-phase method and chemical solution method. Among them, the steps of the chemical solution method are: dissolving sodium tungstate and cesium nitrate in dilute nitric acid solution respectively, then adding complexing agent and stirring respectively, and then mixing the stirred solutions to obtain the cesium tungstate precursor solution, Finally, the precursor solution is dried, cooled, calcined and then cooled to obtain the desired product.
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