Cobalt tungstate, also called cobalt tungsten oxide, is widely applied as dingal material in antiknock, catalyst, pigment additive and microwave dielectric ceramic. Its formula is CoWO4 and CAS No. is 12640-47-0.
Producing Method
Adopt sodium tungstate and cobalt chloride as raw materials to prepare nanometer tungstate cobalt powder by using lithium nitrate - sodium nitrate molten salt method. The mass ratio of the molten salt to the cobalt tungstate precursor is 6: 1. React at 210, 270 and 340 °C for 8h respectively to prepare a monoclinic nano-cobalt tungstate with a wolframite structure.
Low temperature molten salt method has the advantages of low synthesis temperature, and simple operation, etc. Also, the mass production can be easily realized.
With the increase of temperature, the crystallinity of the powder and the average particle size increases. And it shows different degrees of light absorption in the ultraviolet and visible regions. Under molten salt technology, the growth of the powder controlled by diffusion mechanism.
More details, please visit:
http://tungstate.net/English/cobalt-tungstate.html
