Method for preparing lanthanum zirconate powder
A lanthanum zirconate and system technology, which is applied in the field of ceramic powder preparation for high temperature thermal barriers, can solve the problems of large grain size, uneven particle size distribution, and reduced
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Embodiment 1
[0029] Step 1: At room temperature, dissolve lanthanum-containing soluble salts with deionized water or dissolve lanthanum oxide with dilute nitric acid to obtain La 3+ solution, dissolving soluble zirconium salts with deionized water to obtain Zr-containing 4+ solution, the concentration of the two solutions is 0.5mol / L.
[0030] Step 2: Mix the two solutions obtained in Step 1 to prepare a solution containing La 3+ and Zr 4+ The mixed solution of [La 3+ ] / [Zr 4+ ] with a ratio of 1. The molar concentration of cations in the mixed solution is 1mol / L, under the condition of continuous stirring, a surfactant accounting for 3wt% of the volume of the mixed solution is added to the mixed solution, and the stirring is continued for 3 hours;
[0031] Step 3: Under the condition of continuous stirring, add the mixed solution obtained in step 2 dropwise to the precipitating agent, or add the precipitating agent dropwise to the mixed solution, the rate of addition is 50ml / min, and...
Embodiment 2
[0040] The difference between this example and the lanthanum zirconate ceramic powder material for high-temperature thermal barrier coatings described in Example 1 is that the La 3+ and Zr 4+ The concentration of the solution is 0.2mol / L.
Embodiment 3
[0042] The difference between this example and the lanthanum zirconate ceramic powder material for high-temperature thermal barrier coatings described in Example 1 is that the La 3+ and Zr 4+ The concentration of the solution is 0.4mol / L.
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