Using simulated radioactive incineration ashes and natural zirconite as main raw materials

adopting the formula design

and by means of thermogravimetry-differential scanning calorimeter(TG-DSC) analysis

X-ray diffraction(XRD) analysis etc

the high temperature solid-state synthesis of zirconolite and sphene has been realized.The experimental result indicates that zirconolite and sphene with high purity can be synthesized at lower temperature.The most appropriate and lowest temperatures of synthesizing zirconolite and sphene are dependent on the content of the simulated radioactive incineration ashes.The lowest synthesis temperature may be below 1140℃.When the content of the simulated radioactive incineration is 0

20%

40% and 60%

the optimal synthesis temperature is 1260℃

1260℃

1230℃ and 1200℃

respectively.