CsxWO3 Powder Applied for Infrared Ultraviolet Shielding Material

CsxWO3 powder may be applied for preparing infrared ultraviolet shielding material, such as, thermal insulation film, and heat insulating coating, and so on. And thus it may be applied to building energy-saving glass. In order to prepare heat insulating material with excellent shielding properties on infrared rays and ultraviolet rays, particularly near-infrared rays, it is necessary to prepare cesium tungsten bronze powder with these excellent properties. The following is a preparation method of cesium tungsten bronze.

Preparation of CsxWO3 Powder

Step 1: Sodium tungstate solution with a concentration of 0.5mol/L is exchanged with strong acid ion exchange resin to obtain tungstic acid sol; In this process, the H+ in exchange resin is exchanged with Na+ in sodium tungstate.

Step 2: Add citric acid solution and cesium carbonate solution to the tungstic acid sol prepared in the step 1, mixing the mixture to obtain precursor liquid; The concentration of citric acid solution and cesium carbonate solution is 0.1-0.5Mol/L.

Step 3: The precursor liquid prepared in step 2 is hydrothermally reacted at a temperature of 160-180°C and a pressure of 0.8-1MPa, and the hydrothermal reaction time is 24h. Under the action of citric acid, the tungstic acid undergoes a reduction reaction to form tungsten bronze. And the cesium ions are doped into the tungsten bronze structure, thereby obtaining cesium tungsten bronze crystal.

Step 4: After the hydrothermal reaction of step 3 is completed, the reaction solution is subjected to solid-liquid separation, the solvent is removed, and the residue is retained. And the solid-liquid separation method can be carried out by filtration or centrifugation.

More details, please visit:
http://www.tungsten-powder.com/cesium-tungsten-bronze-chinatungsten.html

• < Prev
• Next >