Preparation method of anti-purple-halo transparent ceramic panel for replacing sapphires
A technology for transparent ceramics and anti-purple halo is applied in the field of preparation of anti-purple halo transparent ceramic panels for replacing sapphire. The effect of high production capacity and high utilization rate
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Embodiment 1
[0032] This embodiment provides a preparation method for replacing sapphire with an anti-purple halo transparent ceramic panel, the preparation method comprising the following steps:
[0033] (1) AlON powder prepared by the thermite method is used as raw material: specifically, Al powder with a purity of 99.9% and Al with a purity of 99.99% 2 o 3 As the raw material, the mass percentage of the two is 9:91. Al powder and Al 2 o 3 Based on the total amount of powder composed of powder, add 1.1 times of absolute ethanol, use high-purity alumina balls as grinding balls, and the mass of the balls is twice the total amount of powder, and put them together into a polytetrafluoro tank for ball milling for 20 hours. The ball-milled slurry was dried in an oven at 60°C for 24 hours, and then ground to 200 mesh;
[0034](2) Place the mixed raw material obtained in step (1) in a boron nitride crucible for sintering in a carbon furnace, and fill it with high-purity nitrogen to keep the ...
Embodiment 2
[0040] The present embodiment provides a kind of preparation method that replaces sapphire anti-purple halo transparent ceramic panel, and described preparation method comprises the steps:
[0041] (1) Y prepared by co-precipitation method 2 o 3 As a raw material, specifically at room temperature, Y(NO 3 ) 3 Dissolve in deionized water, add dispersant (NH4) 2 SO 4 and PAA, sintering aid MgSO 4 ·7H 2 O, made into metal ion solution as the mother liquor, the total concentration of metal ions is 0.5mol / L; NH 4 HCO 3 Make a solution with deionized water as a precipitant, NH 4 HCO 3 The volume of the solution is 3 times of the volume of the mixed solution of metal ions;
[0042] (2) adopt forward titration method, the precipitation agent NH of step (1) 4 HCO 3 The solution was slowly added dropwise to the mother liquor at a speed of 3mL / min, while stirring, and after the titration reaction was completed, the stirring was continued for 20 hours;
[0043] (3) Wash the pr...
Embodiment 3
[0049] This embodiment provides a preparation method for replacing sapphire with an anti-purple halo transparent ceramic panel, the preparation method comprising the following steps:
[0050] (1) Spinel powder prepared by co-precipitation method is used as raw material, specifically, at room temperature, Al(NO 3 ) 3 and Mg(NO 3 ) 2 Dissolve in deionized water, add dispersant PAA, make metal ion mixed solution as mother liquor, the total concentration of metal ions is 0.5mol / L, and the molar ratio of Mg:Al is 1:2; analytically pure ammonia water is used as precipitant;
[0051] (2) Using the forward titration method, the precipitant ammonia water in step (1) is slowly added dropwise to the mother liquor at a speed of 2mL / min, while stirring, and after the titration reaction ends, continue to stir for 20 hours;
[0052] (3) Repeatedly rinse the precipitate obtained in step (2) with deionized water, then wash and filter the precipitate with absolute ethanol, dry the resulting ...
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