High-energy-storage-density barium potassium niobate based glass ceramic energy storage material and preparation as well as application
A technology of high energy storage density and glass ceramics is applied in the field of dielectric energy storage materials, which can solve the problems of low energy storage density of energy storage materials, and achieve the effects of simple preparation method, easy source and improved energy storage density.
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Embodiment 1
[0033] A method for preparing a barium potassium niobate-based glass-ceramic energy storage material with high energy storage density, comprising the following steps:
[0034] (1) BaCO with a purity greater than 99wt% 3 、K 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material batching, the molar percentages of the above-mentioned components are 16%, 16%, 32% and 36%. After adding alcohol to moisten and ball mill the mixture for 16 hours, dry it and melt it at 1530°C for 3 hours;
[0035] (2) Pouring the high-temperature melt obtained in step (1) into a metal mold, annealing for stress relief at 650° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 0.9 mm;
[0036] (3) The glass flakes prepared in step (2) were kept at 900° C. for 4 hours for controlled crystallization to prepare barium potassium niobate-based glass-ceramic energy storage materials with high energy storage density.
[0037] The XRD of the sample that present embodiment makes is as figur...
Embodiment 2
[0039] A method for preparing a barium potassium niobate-based glass-ceramic energy storage material with high energy storage density, comprising the following steps:
[0040] (1) BaCO with a purity greater than 99wt% 3 、K 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material batching, the molar percentages of the above components are 22.4%, 9.6%, 32% and 36%. After ball milling and mixing for 16 hours, dry and melt at 1530°C for 3 hours;
[0041] (2) Pouring the high-temperature melt obtained in step (1) into a metal mold, annealing for stress relief at 650° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 1.2 mm;
[0042] (3) The glass flakes prepared in step (2) were kept at 900° C. for 4 hours for controlled crystallization to obtain glass ceramics.
[0043] The XRD of the sample that present embodiment makes is as figure 1 As shown, the dielectric properties are as image 3 As shown, the withstand voltage performance test is as follows Figure 5...
Embodiment 3
[0045] A method for preparing a barium potassium niobate-based glass-ceramic energy storage material with high energy storage density, comprising the following steps:
[0046] (1) BaCO with a purity greater than 99wt% 3 、K 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material batching, the molar percentages of the above components are 25.6%, 6.4%, 32% and 36%, after ball milling for 16 hours, drying, and melting at 1530°C for 3 hours;
[0047] (2) Pouring the high-temperature melt obtained in step (1) into a metal mold, annealing for stress relief at 650° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 1.0 mm;
[0048] (3) The glass flakes prepared in the step (2) were kept at 900° C. for 4 hours for controlled crystallization to obtain a glass-ceramic material.
[0049] The XRD of the sample that present embodiment makes is as figure 1 As shown, the dielectric properties are as image 3 As shown, the withstand voltage performance test is as follows ...
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