| 摘要 |
The invention of the present application provides zirconium tungstate which is characterized in that the intensity of a peak appearing in a range of 2&thetas; = 23.5 to 23.9˚ ranges from 92 to 115% when the intensity of a diffraction peak appearing in a range from 2&thetas; = 21.4 to 21.8˚ is 100% in X-ray diffraction. Conventionally, there is a problem that the synthesis of a crystal of zirconium tungstate takes a long time, and therefore the application of zirconium tungstate to products has not been advanced. It is reported that zirconium tungstate can be produced using a platinum crucible in a laboratory. However, this production technique is not suitable for the mass production of zirconium tungstate. There is also a problem that zirconium tungstate volatilizes easily (the weight of zirconium tungstate usually is reduced by 0.3% at 950˚C within 2 hours) and therefore it is difficult to control the chemical composition of zirconium tungstate. The invention of the present application addresses the problem of controlling the chemical composition of zirconium tungstate and improving the quality of zirconium tungstate to improve the yield of zirconium tungstate, and also addresses the problem of performing the synthesis of a crystal of zirconium tungstate within an extremely short time to reduce the cost required for the production of zirconium tungstate. |
