Method for preparing lanthanum aluminate powder efficiently
A technology of lanthanum aluminate and powder is applied in the field of efficient preparation of lanthanum aluminate powder, which can solve the problems of large raw material particle size, long synthesis time, reduced material particle size, etc. Effect
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Embodiment 1
[0023] Example 1. Lanthanum oxide and aluminum hydroxide were used as initial raw materials, in which the purity of lanthanum oxide was 99.9% (mass percentage), and aluminum hydroxide was an analytically pure chemical reagent (including 33.0% moisture). Weigh 32.60g-0.10mol of lanthanum oxide on a balance, add 200g of water, and hydrothermally heat it in a constant temperature water bath at 100°C for 2.0 hours. The lanthanum oxide is converted to La(OH) by hydrothermal method. 3 . The balance weighs 23.28 g of aluminum hydroxide (including Al(OH) 3 Quantity 0.20mol), La(OH) 3 And Al(OH) 3 Mix with water as a medium and stir for 2 minutes, then filter. The filtered mixture is calcined at a high temperature of 1100°C for 2.0 hours.
Embodiment 2
[0024] Example 2. Lanthanum oxide and aluminum hydroxide were used as initial raw materials. The purity of lanthanum oxide was 99.9% (mass percentage), and aluminum hydroxide was an analytically pure chemical reagent (including 33.0% moisture). Weigh 48.90g-0.15mol lanthanum oxide on a balance, add 300g of water, and hydrothermally heat it in a constant temperature water bath at 100°C for 3 hours. The lanthanum oxide is converted to La(OH) by hydrothermal method. 3 . The balance weighs 34.93 g of aluminum hydroxide (including Al(OH) 3 0.30mol), La(OH) 3 And Al(OH) 3 Use water as the medium to mix and stir for 3 minutes, then filter. The filtered mixture is calcined at a high temperature of 1100°C for 2.5 hours.
Embodiment 3
[0025] Example 3. Lanthanum oxide and aluminum hydroxide were used as initial raw materials. The purity of lanthanum oxide was 99.9% (mass percentage), and aluminum hydroxide was an analytically pure chemical reagent (including 33.0% moisture). Weigh 65.20g-0.20mol of lanthanum oxide on a balance, add 350g of water, and hydrothermally heat at 95°C for 4.0 hours in a constant temperature water bath. The lanthanum oxide is converted to La(OH) by hydrothermal method. 3 . The balance weighs 46.57 g of aluminum hydroxide (including Al(OH) 3 0.40mol), La(OH) 3 And Al(OH) 3 Use water as the medium to mix and stir for 4 minutes, then filter. The filtered mixture is calcined at a high temperature of 1150°C for 2.5 hours.
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