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利用新开发的原料合成技术制备的氧化锆粉,是一种原始颗粒直径约为0.02μm的小圆粒,比普通的陶瓷原料粉的颗粒直径约小3个数量级,因而其烧结性能特别好,可在1400～1500℃的较低温度下进行烧结(比普通氧化锆粉的烧结温度低200℃以上),获得密度达到理论密度99％以上的精细烧结休。 氧化锆粉在室温～1200℃时为稳定的单科晶相,在高于1200℃时依次转化为正方晶相、立方晶相,在降低温度时又按上述顺序转变。在正方晶相与单斜晶相之间的转化中,其体积相应变化约4％。
The zirconia powder prepared by the newly developed raw material synthesis technique is a small round grain with a primary particle diameter of about 0.02 μm which is about 3 orders of magnitude smaller than that of a common ceramic raw material powder and thus has particularly good sintering property, Sintering can be carried out at a relatively low temperature of 1400-1500 ° C (200 ° C lower than the sintering temperature of ordinary zirconia powder) to obtain a fine sintered sheet having a density of 99% or more of the theoretical density. Zirconia powder is a stable monoclinic phase at room temperature ~ 1200 ℃. When the temperature is higher than 1200 ℃, the zirconia powder is transformed to the orthorhombic phase and the cubic phase in turn, and when the temperature is lowered, the zirconia powder changes in the above order. In the transformation between the tetragonal phase and the monoclinic phase, the volume thereof changes by about 4%.