Nano Tungsten Trioxide Applied for Exhibition Hall Thermal Insulating Film

Do you know how to realize the industrialized mass production of nano tungsten trioxide for exhibition hall thermal insulating film? The experts introduced such a preparation method that is simple in process and easy to control. This new preparation method also reduces industrial production investment. So, the product cost is lower. And finally it facilitates the industrial mass production.

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http://www.tungsten-powder.com/tungsten-oxide.html

Specifically, the saturated ammonium tungstate solution is heated to 65-70 °C, then 8-13 g/L ammonium chloride is added, and the mixture is stirred for 0.5-1 h; then, tartaric acid, ethylenediamine tetrapropionic acid (EDTP) and diethanolamine are added in order. The additive amounts are 11-14g/L, 23-32g/L and 6-9g/L, stir to completely dissolve and continue to stir for 1-2h; continue to stir and add 320-380 ml/L of nitric acid to form tungstic acid gel; put the gel in a heating furnace, dry at 140-150 °C, increase the temperature at a rate of 1-2 ° C/min, keep it for 1-2h, and then raise the temperature to 340-380 °C at 2-3 ° C/min. After incubation for 2-3 hours, calcination was carried out, and finally, nano tungsten trioxide was obtained by ball milling.

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