High energy storage density strontium potassium niobate based glass ceramic energy storage material and preparation and application thereof
A technology of high energy storage density and energy storage materials, which is applied in the field of dielectric energy storage materials, can solve the problems of low breakdown electric field, uneven microstructure, low energy storage density, etc., so as to improve the breakdown field strength, Improve the effect of micro junction and theoretical energy storage density
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Embodiment 1
[0038] Potassium strontium niobate-based glass-ceramic energy storage material formulation 70wt% [25% K 2 O-25%SrO-50%Nb 2 o 5 ]-30wt% (80% SiO 2 -10%Al 2 o 3 -10%B 2 o 3 ), prepared by the following method:
[0039] (1) K with a purity greater than 99wt% 2 CO 3 , SrCO 3 and Nb with a purity of 99.99 wt% 2 o 5 , SiO 2 、Al 2 o 3 、H 3 BO 3 For raw material ingredients, the molar percentage of each component is 17.5%, 17.5%, 35%, 24%, 3%, and 3% is mixed by ball mill for 24 hours, dried at 120°C for 6 hours, and melted at 1500°C 2h; (The above-mentioned ball mills all use absolute ethanol as the medium, and the ball-to-material ratio is 1.5:1).
[0040] (2) Pouring the high-temperature melt obtained in step (1) into a square copper mold, annealing for stress relief at 500° C. for 5 hours, and then cutting to obtain glass flakes with a thickness of 1.0 to 1.5 mm;
[0041] (3) Put the glass flake prepared in step (2) in a microwave oven at a heating rate of 20° C....
Embodiment 2
[0052] Potassium strontium niobate-based glass ceramic energy storage material with 55wt% [25% K 2 O-25%SrO-50%Nb 2 o 5 ] - 45wt% (80% SiO 2 -10%Al 2 o 3 -10%B 2 o 3 ), prepared by the following method:
[0053] (1) K with a purity greater than 99wt% 2 CO 3 , SrCO 3 and Nb with a purity of 99.99 wt% 2 o 5 , SiO 2 、Al 2 o 3 、H 3 BO 3 For raw material ingredients, the molar percentage of each component is 13.75%, 13.75%, 27.5%, 36%, 4.5%, 4.5%, mixed by ball mill for 24 hours, dried at 120°C for 6 hours, and melted at 1500°C 2h; (The above-mentioned ball mills all use absolute ethanol as the medium, and the ball-to-material ratio is 1.5:1).
[0054] (2) Pouring the high-temperature melt obtained in step (1) into a square copper mold, annealing for stress relief at 500° C. for 5 hours, and then cutting to obtain glass flakes with a thickness of 1.0 to 1.5 mm;
[0055] (3) Put the glass flake prepared in step (2) in a microwave oven at a heating rate of 20° C. / mi...
Embodiment 3
[0066] Potassium strontium niobate-based glass ceramic energy storage material with 50wt% [25% K 2 O-25%SrO-50%Nb 2 o 5 ]-50wt% (80% SiO 2 -10%Al 2 o 3 -10%B 2 o 3 ), prepared by the following method:
[0067] (1) K with a purity greater than 99wt% 2 CO 3 , SrCO 3 and Nb with a purity of 99.99 wt% 2 o 5 , SiO 2 、Al 2 o 3 、H 3 BO 3 For raw material ingredients, the molar percentage of each component is 12.5%, 12.5%, 25%, 40%, 5%, 5%, mixed by ball mill for 24 hours, dried at 120°C for 6 hours, then melted at 1500°C 2h; (The above-mentioned ball mills all use absolute ethanol as the medium, and the ball-to-material ratio is 1.5:1).
[0068] (2) Pouring the high-temperature melt obtained in step (1) into a square copper mold, annealing for stress relief at 500° C. for 5 hours, and then cutting to obtain glass flakes with a thickness of 1.0 to 1.5 mm;
[0069] (3) Put the glass flake prepared in step (2) in a microwave oven at a heating rate of 20° C. / min to 900°...
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