Method for preparing strontium titanate film having spherical grain accumulated porous structure
A spherical particle and porous structure technology, applied in the direction of solid-state chemical plating, coating, metal material coating technology, etc., can solve problems such as thermal stability, poor uniformity of pore distribution, poor interpenetration of channels, and difficulty in synthesizing templates , to achieve uniform pore distribution, low synthesis temperature, and increase the effective utilization rate
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Embodiment 1
[0024] Add 62ml of absolute ethanol, 17.02g of tetrabutyl titanate, and 7.905g of diethanolamine to a 250ml beaker, stir continuously at a water bath temperature of 30°C, and then stand still for 30min to fully complex; under the condition of constant stirring at a speed of 500rpm Next, 27ml of strontium acetate aqueous solution (Sr(CH 3 COO) 2 .0.5H 2 O, 397.6g / L) was added dropwise to the tetrabutyl titanate ethanol solution at a rate of 0.25ml / min. After the titration was completed for 30 minutes, 1.0g of polyethylene glycol PEG2000 was added and continued to stir until the concentration was 0.4mol / L’s uniform and stable transparent strontium titanate sol; the strontium titanate sol was aged at room temperature for 4 hours and then coated by dipping and pulling method. The ceramic substrate with a clean surface was vertically immersed in titanic acid at a constant speed of 6cm / min In the strontium sol, stand still for 20s, then pull the substrate vertically and uniformly...
Embodiment 2
[0027] Add 94ml of absolute ethanol, 17.02g of tetrabutyl titanate, and 10.54g of diethanolamine into a 250ml beaker, stir evenly at a water bath temperature of 35°C, and then stand still for 30 minutes to fully complex; under the condition of constant stirring at a speed of 600rpm Next, 36.4ml strontium acetate aqueous solution (Sr(CH 3 COO) 2 .0.5H 2 O, 294.9g / L) was added dropwise to the tetrabutyl titanate ethanol solution at a rate of 0.5ml / min. After the titration was completed for 50 minutes, 2.0g of polyethylene glycol PEG2000 was added, and the stirring was continued until a concentration of 0.3mol / The uniform, stable and transparent strontium titanate sol of L; the strontium titanate sol was aged at room temperature for 8 hours and then coated by the dipping and pulling method, and the glass substrate with a clean surface was vertically immersed in the titanium In strontium titanate sol, stand still for 20s, then pull up the substrate vertically and uniformly at a...
Embodiment 3
[0030] Add 176ml of absolute ethanol, 17.02g of tetrabutyl titanate, and 15.81g of diethanolamine into a 500ml beaker, stir continuously at a water bath temperature of 35°C, and then stand still for 30 minutes to fully complex; under the condition of constant stirring at a speed of 800rpm Next, 41ml strontium acetate aqueous solution (Sr(CH 3 COO) 2 .0.5H 2 O, 268.4g / L) was added dropwise to the tetrabutyl titanate ethanol solution at a rate of 1ml / min, and 1 hour after the titration was completed, 3.0g of polyethylene glycol PEG2000 was added, and the stirring was continued until a concentration of 0.2mol / L was obtained. The uniform, stable and transparent strontium titanate sol; the strontium titanate sol was aged at room temperature for 10 hours and then coated by the dipping and pulling method. The silicon wafer with a clean surface was vertically immersed in the strontium titanate at a constant speed of 6cm / min. In the sol, stand still for 20s, then pull the substrate v...
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