A dense sub -micron crystal β ″al 2 o 3 Products, preparation methods and applications
A dense submicron and submicron technology, which is applied in the field of its preparation and dense submicron β"-Al2O3 products, can solve problems such as residues, achieve the effects of inhibiting diffusion, reducing costs, and high mechanical strength
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Embodiment 1
[0047] In this example, β"-Al 2 o 3 The molecular formula of the electrolyte substrate is Na 1.67 Al1 0.67 Mg 0.67 o 17 , its preparation method is as follows:
[0048] (1) Preparation of β"-Al 2 o 3 Powder
[0049] To synthesize 10mol, 6.15kg Na 1.67 Al1 0.67 Mg 0.67 o 17 as an example.
[0050] Weigh 5.4kg of boehmite, 1.44kg of sodium metaaluminate, 395g of magnesium hydroxide, and 10kg of ethanol, mix them in a grinding barrel, use a horizontal sand mill, 2400 rpm, and grind for 5 hours to obtain a uniform slurry material;
[0051] Drying at 45-60°C to remove ethanol, and calcining at 1200°C for 2 hours to obtain a calcined product;
[0052] Grind the calcined product in water or ethanol, add an appropriate amount of binder (PVA or PVP), and spray granulate to obtain β"-Al 2 o 3 Granulated powder.
[0053] (2) Preparation of β"-Al 2 o 3 Strip
[0054] Weigh 1kgβ"-Al 2 o 3 Granulating powder, adding alcohol, PVB, DBP, PEG and tributyl citrate, ball mil...
Embodiment 2
[0058] In this embodiment, in this embodiment, the electrolyte substrate is β"-Al 2 o 3 -YSZ, its preparation method is as follows:
[0059] (1) Preparation of β"-Al 2 o 3 -YSZ powder
[0060] To synthesize 10mol, 6.15kg Na 1.67 Al1 0.67 Mg 0.67 o 17 as an example.
[0061] Weigh 5.4kg of boehmite, 1.44kg of sodium metaaluminate, 395g of magnesium hydroxide, and 10kg of ethanol, mix them in a grinding barrel, use a horizontal sand mill, 2400 rpm, and grind for 5 hours to obtain a uniform slurry Material; dry at 45-60°C to remove ethanol, and calcined at 1200°C for 2h to obtain the calcined product Na 1.67 Al1 0.67 Mg 0.67 o 17 Powder;
[0062] 6kg Na 1.67 Al1 0.67 Mg 0.67 o 17 , 4kg 8YSZ powder is ground in water or ethanol, adding an appropriate amount of binder (PVA or PVP), and spraying granulation to obtain β"-Al 2 o 3 - YSZ granulation powder.
[0063] (2) Preparation of β"-Al 2 o 3 -YSZ Strip
[0064] Weigh 1kgβ"-Al 2 o 3 -YSZ granulation powder,...
Embodiment 3
[0068] In the present embodiment, in the present embodiment, the electrolyte substrate is Mn and Ti doped β "-Al 2 o 3 -YSZ, its preparation method is as follows:
[0069] (1) Preparation of β"-Al doped with Mn and Ti 2 o 3 -YSZ powder
[0070] To synthesize 10mol, 6kg Mn and Ti-doped Na 1.67 Al1 0.67 Mg 0.67 o 17 as an example.
[0071] Weigh boehmite 5.4kg, sodium metaaluminate 1.44kg, magnesium hydroxide 395g, manganese acetate 370g, butyl titanate 68, ethanol 10kg, mix them in a grinding barrel, use a horizontal sand mill, 2400 rev / min, grind for 5h to obtain a homogeneous slurry;
[0072] Drying at 45-60°C to remove ethanol, and calcining at 1200°C for 2 hours to obtain a calcined product;
[0073] 6 kg Mn doped with Ti Na 1.67 Al1 0.67 Mg 0.67 o 17 Grind 4kg 8YSZ powder in water or ethanol, add an appropriate amount of binder (PVA or PVP), and spray granulate to obtain Mn and Ti doped β"-Al 2 o 3 - YSZ granulation powder.
[0074] (2) Preparation of Mn a...
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