| abstract |
The invention relates to the field of zirconia ceramics, and discloses a zirconia ceramic and a preparation method and application thereof. The zirconia ceramics include: Y, Zr, Mg, Al, Si and Nb in terms of elements, and the phases of the zirconia ceramics include: monoclinic zirconia, tetragonal zirconia, zirconium silicate and cordierite ; Wherein, the zirconia ceramics include in terms of elements: 50.6-61.1wt% of Zr, 5.1-12.6wt% of Al+Mg+Si, 3.2-3.9wt% of Y, 0.3-2.7wt% of Nb; The phases of the zirconia ceramics include: 60-80wt% of monoclinic zirconia, 3-30wt% of tetragonal zirconia, 8-22wt% of cordierite, and 0.5-3wt% of zirconium silicate. The zirconia ceramic can simultaneously have the characteristics of a dielectric constant of less than 30, a density of less than 5.40 g/cm 3 and a toughness of more than 6.5MPam 0.5 , and can be used for mobile phone backplanes with low dielectric constant, low density and good toughness. |