Compound ceramic film lamination high energy storage density capacitor and preparation method thereof
A technology of high energy storage density and composite ceramics, applied in the direction of multilayer capacitors, fixed capacitor dielectrics, fixed capacitor components, etc., can solve the problem of not being able to significantly improve the breakdown field strength of ceramic-polymer films, and achieve low cost , The effect of high energy storage density and high specific power
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Embodiment 1
[0056] Take by weighing 5.510g PMN ceramic powder (density is 8.3g / cm 3 ) accounted for 60% by volume, 0.755gPVDF (polyvinylidene fluoride, density 1.7g / cm 3 ) accounted for 40% by volume, measured 6mL DMF (N, N-dimethylformamide), added to a 50mL agate ball mill jar, and ball milled for 15 hours to obtain a precursor slurry; the slurry was naturally flowed on a clean substrate Unfold flat, place in a vacuum drying oven, and vacuum dry at 50-160°C to remove the solvent DMF to obtain a composite ceramic film; wherein, the volume fraction of PMN ceramic powder is 60%; cut the obtained composite film into a circle Sheet or square sheet, with aluminum foil on both sides or between them as electrodes, heated in vacuum at 170-200°C to soften PVDF, and hot-pressed at 10-120MPa to obtain a single-layer or multi-layer capacitor. electrical properties. The thickness of the composite film is 67-80 μm. Under the measurement conditions of 1kHz, 1.0V, and 25°C, the relative dielectric con...
Embodiment 2
[0058] Take by weighing 3.018g PMN ceramic powder (density is 8.3g / cm 3 ) accounted for 63% by volume, 0.358gPVDF (density 1.7g / cm 3 ) accounted for 37% by volume percentage, measured 6mL DMF, added to a 50mL agate ball mill jar, and ball milled for 30h to obtain a precursor slurry; the slurry was naturally leveled on a clean substrate, placed in a vacuum oven, and Vacuum drying at 50-160°C removes the solvent DMF to obtain a composite ceramic film; wherein, the volume fraction of PMN ceramic powder is 63%; the obtained composite film is cut into circular or square pieces, and the two sides or between each The backing aluminum foil is used as an electrode, and the PVDF is softened by vacuum heating at 170-200 ° C, and hot-pressed at 10-120 MPa to obtain a single-layer or multi-layer capacitor, and its dielectric properties are measured. The thickness of the composite film is 20-40 μm. Under the measurement conditions of 1kHz, 1.0V, and 25°C, the relative dielectric constant i...
Embodiment 3
[0060] Take by weighing 5.520g PMN ceramic powder (density is 8.3g / cm 3 ) accounted for 69% by volume, 0.505gPVDF (density 1.7g / cm 3 ) accounted for 31% by volume percentage, measured 6mL DMF, added to a 50mL agate ball mill jar, and ball milled for 10 hours to obtain a precursor slurry; the slurry was naturally leveled on a clean substrate, placed in a vacuum oven, and Vacuum drying at 50-160°C removes the solvent DMF to obtain a composite ceramic film; wherein, the volume fraction of PMN ceramic powder is 69%; the obtained composite film is cut into circular or square pieces, and the two sides or between each The backing aluminum foil is used as an electrode, and the PVDF is softened by vacuum heating at 170-200 ° C, and hot-pressed at 10-120 MPa to obtain a single-layer or multi-layer capacitor, and its dielectric properties are measured. The thickness of the composite film is 100-120 μm. Under the measurement conditions of 1kHz, 1.0V, and 25°C, the relative dielectric con...
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