| Ferroelectric ceramic materials have great dielectric constant,low breakdown field strength,and polymer materials are opposite.Combining the two phases with proper techniques,the dielectric materials can be obtained with high energy storage while using the advantages of each component,which has important implications for the electronic power industry and the energy sector.In this paper,the typical ferroelectric ceramic lead zirconate titanate(PZT)and anti-ferroelectric ceramics lead zirconate(PZ)and polymer binary copolymer poly(vinylidene fluoride-three fluoride)(P(VDF-Tr FE))are the objects of study,and The 0-3 type and 2-2 type PZT and PZ/P(VDF-Tr FE)composite films are prepared.Through atomic force microscopy(AFM),X-ray diffractometer(XRD)and scanning electron microscopy(SEM)characterization methods,and dielectric and ferroelectric performance test results.The effects of ceramic filler content and annealing on the energy storage performance of 0-3 PZT/P(VDF-Tr FE)are studied,and it is compared to the energy storage performance of 0-3 PZ/P(VDF-Tr FE)composite thin films.At the same time,The factors such as annealing technology,spin coating numbers of P(VDF-Tr FE)film and P(VDF-Tr FE)solution concentration that influence storage properties of PZT and PZ/P(VDF-Tr FE)composite film are studied.And the PZ/P(VDF-Tr FE)composite thin film with larger energy storage value is prepared.The PZT powder is mixed with the P(VDF-Tr FE)solution,and the PZT/P(VDF-Tr FE)composite film is prepared by solution casting.Dielectric performance test results show that the 0-3 type PZT/P(VDF-Tr FE)composite film of dielectric constant and dielectric loss increases with the increase of the content of PZT and its frequency dependence is greater,in addition,its breakdown field strength decreases with the increase of the content of PZT and the energy-storage density value increase first and then change with the increase of the content of PZT.When the content of PZT is 15%,its energy-storage density value is 2.35J/cm3,compared with the energy-storage density value of single phase P(VDF-Tr FE)thin film of solution(0.96 J/cm3),up 1.5 times,energy-storage efficiency calculation result is 35.7%,and after the annealing,its energy-storage performance degrades.The energy-storage density value of the 0-3 type PZ/P(VDF-Tr FE)composite flim is 1.79 J/cm3 in the 211.6k V / cm electric field when the content of the PZ is 15%,and its energy-storage efficiency is 40.8%,The dielectric constant of the filler is large,and it is beneficial to obtain the high energy storage density value for the 0-3 type composite film.The PZT film is prepared by sol-gel spin,and its energy storage density is 3.01J/cm3,and the energy storage efficiency was 43.6%.The AFM morphological characterization results of the P(VDF-Tr FE)film shows that the film is better after the vacuum drying and annealing.The result of ferroelectric hysteresis loop integral area calculation shows that the energy-storage density value of P(VDF-Tr FE)spin monolayer film is 3.3J/cm3,and its energy-storage efficiency is 33% at 160? and 2h annealing heat preservation.Then P(VDF-Tr FE)thin film spins on the surface of PZT film to be as a 2-2 type composite film.The energy density of the 2-2 type PZT/P(VDF-Tr FE)composite film increases with the increase of the concentration of the P(VDF-Tr FE)solution,and it increases first then decreases with the increase of the increase of annealing temperature,its energy-storage density value is 4.28J/cm3 when concentration of P(VDF-Tr FE)solution is 0.05g/ml,spin coating once and the annealing temperature is 160?,and its energy-storage efficiency is 45.3%.but if the thickness of flim is increased by using low concentration P(VDF-Tr FE)solution to spin repeatedly,the storage capacity of the 2-2 type PZT/P(VDF-Tr FE)composite film is reduced.By replacement of solvent used in the P(VDF-Tr FE)solution and the use of vacuum drying oven drying and annealing treatment method,the energy-storage density of the 2-2 type PZT/P(VDF-Tr FE)composite film is increased to 7.73J/cm3,2.6 times as large as the PZT film,but its energy-storage efficiency is only 27.8%.XRD phase analysis,SEM morphology analysis and dielectric performance test results show that the best technique for preparing PZ film is: nitric acid oxygen zirconium and zirconium lead acetate being used as the zirconium resource and the lead source,stirring at room temperature then 80? backflow mixing mixture to prepare PZ sol with 0.4 M concentration,standing for 4 days,spining 3 layer to prepare amorphous thin film with thickness of 500 nm,using 700 ? and heat preservation 5 min crystallization processing to prepare PZ crystallization thin film.Its the maximum energy-storage density and energy-storage efficiency are 13.1J/cm3 and 53.9% respectively.The energy-storage density value of 2-2 type PZ/P(VDF-Tr FE)composite film prepared by spin coating is 9.44 J/cm3,its energy-storage efficiency is 26.2%,its breakdown field strength is increased from 731 k V/cm to 1578 k V/cm,expand the range of application. |
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