Cesium tungsten bronze powder may be used for the preparation of window heat insulation film. The obtained thin film has excellent thermal insulation property, so that it may be widely used in heat insulating architectural glass. So, how is this kind of the thermal insulating raw material cesium tungsten bronze prepared? The preparation method of cesium tungsten bronze is described below.
Preparation Method of Cesium Tungsten Bronze
1.0 Weigh a certain amount of sodium tungstate (Na2WO4?2H2O), dissolve it in deionized water, prepare 0.5mol/L sodium tungstate solution, and ion exchange the sodium tungstate solution with styrene cation exchange resin to obtain 0.5mol/L tungstic acid solution;
2.0 Take 60ml of 0.5mol/L tungstic acid solution, put it into a beaker, add 37.5g of citric acid once in stirring, stir evenly, then slowly add 15ml 0.1mol/L cesium carbonate solution, then add 90ml absolute ethyl alcohol, stirring for 1h, obtaining reaction precursor solution;
3.0 The precursor solution prepared above is transferred into three 100ml autoclaves in three groups, and continuously hydrothermally reacted at 190°C for 3d;
4.0 The precipitate after the reaction is washed with water and alcohol three times in sequence, and after centrifugation, it is dried in a sub-vacuum at 50°C for 10 hours to obtain cesium tungsten bronze powder.
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