Bismuth-based lead-free high energy storage density ceramic material and preparation method thereof
A technology of high energy storage density and ceramic materials, applied in the field of ceramic materials, can solve the problems of low energy storage density and efficiency, and achieve the effects of improving energy storage density, improving breakdown field strength, and good temperature stability
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Embodiment 1
[0023] The present invention uses analytically pure grade Bi 2 o 3 、Na 2 CO 3 , SrCO 3 、TiO 2 and Nb 2 o 5 As the raw material, according to the chemical formula 0.65Bi 0.5 Na 0.5 TiO 3 +0.35SrTiO 3 +5.0wt%Nb 2 o 5 , after weighing the raw materials, put them into a ball mill jar, use absolute ethanol as the medium, ball mill for 24 hours, put the obtained slurry into an oven for drying, pass through a 80-mesh sieve, and pre-fire at 850°C for 4 hours. The powder obtained by pre-calcination is crushed, ball milled, dried and passed through a 120-mesh sieve, then added a certain amount of 3wt% PVA aqueous solution to granulate, molded, stayed at 600°C for 2h to remove the glue, and then sintered at 1200-1300°C for 2h . Polish the fired ceramic sheet, burn the silver electrode and let it stand for 24 hours, and finally perform the electrical performance.
Embodiment 2
[0025] The present invention uses analytically pure grade Bi 2 o 3 、Na 2 CO 3 , SrCO 3 、TiO 2 and Nb 2 o 5 As the raw material, according to the chemical formula 0.50Bi 0.5 Na 0.5 TiO 3 +0.50SrTiO 3+1.0wt%Nb 2 o 5 , after weighing the raw materials, put them into a ball mill jar, use absolute ethanol as the medium, ball mill for 24 hours, put the obtained slurry into an oven for drying, pass through a 80-mesh sieve, and pre-fire at 850°C for 4 hours. The powder obtained by pre-calcination is crushed, ball milled, dried and passed through a 120-mesh sieve, then added a certain amount of 3wt% PVA aqueous solution to granulate, molded, stayed at 600°C for 2h to remove the glue, and then sintered at 1200-1300°C for 2h . Polish the fired ceramic sheet, burn the silver electrode and let it stand for 24 hours, and finally perform the electrical performance.
Embodiment 3
[0027] The present invention uses analytically pure grade Bi 2 o 3 、Na 2 CO 3 , SrCO 3 、TiO 2 and Nb 2 o 5 As the raw material, according to the chemical formula 0.60Bi 0.5 Na 0.5 TiO 3 +0.40SrTiO 3 +2.5wt%Nb 2 o 5 , after weighing the raw materials, put them into a ball mill jar, use absolute ethanol as the medium, ball mill for 24 hours, put the obtained slurry into an oven for drying, pass through a 80-mesh sieve, and pre-fire at 850°C for 4 hours. The powder obtained by pre-calcination is crushed, ball milled, dried and passed through a 120-mesh sieve, then added a certain amount of 3wt% PVA aqueous solution to granulate, molded, stayed at 600°C for 2h to remove the glue, and then sintered at 1200-1300°C for 2h . Polish the fired ceramic sheet, burn the silver electrode and let it stand for 24 hours, and finally perform the electrical performance.
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