What is the process of using nano ammonium metatungstate as a raw material to prepare a nano-ceramic dispersion solution?
First, the cesium tungsten bronze powder is prepared by using ammonium metatungstate and cesium carbonate as raw materials; then, the obtained cesium tungsten bronze powder is dispersed in a resin system such as acrylic acid, polyester or silicone to obtain a new type of heat insulation dispersion liquid. So, the preparation of cesium tungsten bronze is very important. According to experts, a preparation method of cesium tungsten bronze nanopowder is shown as below.
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A method for preparing cesium tungsten bronze nanopowder includes the following steps:
Step one: Weigh 5.07g ammonium metatungstate, 1.95g cesium carbonate and 14.6g EDTA, adding 50ml of ethylene glycol, and reacted at 170°C for 3h;
Step two: The mixture prepared in step one is loaded into a para-polyphenylene pressure container, reacted at 270°C for 5h;
Step three: The reactant obtained in step two is subjected to alcohol washing, centrifugation, and vacuum drying at 80°C to obtain dark blue cesium tungsten bronze powder with complete crystallinity and high crystallinity.
