High dielectric ceramic/PVDF composite material and preparation method thereof

A composite material and high dielectric technology, applied in the field of high dielectric ceramic/PVDF composite materials and preparation, can solve the problems of energy storage density limitation and low dielectric strength, and achieve high dielectric constant, low dielectric and low loss. Effect

Active Publication Date: 2018-12-14
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the technical problems of low dielectric strength and limited energy storage density in existing dielectric ceramics, one of the purposes of the present invention is

Method used

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  • High dielectric ceramic/PVDF composite material and preparation method thereof
  • High dielectric ceramic/PVDF composite material and preparation method thereof
  • High dielectric ceramic/PVDF composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Ca 0.9 Ni 0.1 Cu 3 Ti 4 o 12 The preparation process of / PVDF composite material is as follows:

[0034] 1) Preparation of ceramic powder Ca 0.9 Ni 0.1 Cu 3 Ti 4 o 12

[0035] 1.1) Add 0.9mol of Ca(NO 3 ) 2 , 0.1mol of Ni(NO 3 ) 2 .6H 2 O and Cu(N0 3 )2·3H 2 O These three substances were dissolved in ethanol and deionized water volume ratio (3:1) solution.

[0036] 1.2) Ti(OC 4 h 9 ) 4 Dissolved to form a 0.5mol / L solution.

[0037] 1.3) Mix the above two solutions, add an appropriate amount of nitric acid to the mixed solution, stir for 20 minutes, and then react at 50 degrees for 24 hours.

[0038] 1.4) Dry the formed gel at 80 degrees to form a xerogel.

[0039] 1.5) Dry the formed xerogel at 900°C for two hours to obtain ceramic powder Ca 0.9 Ni 0.1 Cu 3 Ti 4 o 12 .

[0040]2) Mixing of ceramics and PVDF

[0041] 2.1) Dissolve 1.5g of PVDF in DMF to obtain a PVDF solution.

[0042] 2.2) Add 1 g of the prepared ceramic powder into the PV...

Embodiment 2

[0046] Ca 0.8 Ni 0.2 Cu 3 Ti 4 o 12 The preparation process of / PVDF composite material is as follows:

[0047] 1) Preparation of ceramic powder Ca 1-x Ni x Cu 3 Ti 4 o 12

[0048] 1.1) 0.8molCa(NO 3 ) 2 ,, 0.2molNi(NO 3 ) 2 .6H 2 O, Cu(N0 3 )2·3H 2 O These three substances were dissolved in ethanol and deionized water volume ratio (3:1) solution.

[0049] 1.2) Ti(OC 4 h 9 ) 4 Dissolved to form a 0.5mol / L solution.

[0050] 1.3) Mix the above two solutions, add an appropriate amount of nitric acid to the mixed solution, stir for 20 minutes, and then react at 50 degrees for 24 hours.

[0051] 1.4) Dry the formed gel at 80 degrees to form a xerogel.

[0052] 1.5) Dry the formed xerogel at 850°C for two hours to obtain ceramic powder Ca 0.8 Ni 0.2 Cu 3 Ti 4 o 12 .

[0053] 2) Mixing of ceramics and PVDF

[0054] 2.1) 1.5g of PVDF was dissolved in DMF to obtain a PVDF solution.

[0055] 2.2) Add 1.5 g of the prepared ceramic powder into the PVDF solut...

Embodiment 3

[0059] Ca 0.5 Ni 0.5 Cu 3 Ti 4 o 12 The preparation process of / PVDF composite material is as follows:

[0060] 1) Preparation of ceramic powder Ca 1-x Ni x Cu 3 Ti 4 o 12

[0061] 1.1) 0.5molCa(NO 3 ) 2 ,, 0.5molNi(NO 3 ) 2 .6H 2 O, Cu(N0 3 )2·3H 2 O These three substances were dissolved in ethanol and deionized water volume ratio (3:1) solution.

[0062] 1.2) Ti(OC 4 h 9 ) 4 Dissolved to form a 0.5mol / L solution.

[0063] 1.3) Mix the above two solutions, add an appropriate amount of nitric acid to the mixed solution, stir for 20 minutes, and then react at 50 degrees for 24 hours.

[0064] 1.4) The formed gel was dried at 80° C. to form a xerogel.

[0065] 1.5) Dry the formed xerogel at 1000°C for two hours to obtain ceramic powder Ca 0.5 Ni 0.5 Cu 3 Ti 4 o 12 .

[0066] 2) Mixing of ceramics and PVDF

[0067] 2.1) 1 g of PVDF was dissolved in DMF to obtain a PVDF solution.

[0068] 2.2) Add 1.5 g of the prepared ceramic powder into the PVDF sol...

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Abstract

The invention relates to a high dielectric ceramic/PVDF composite material and a preparation method thereof, wherein the preparation method comprises the following steps: 1) preparing ceramic powder Ca1-xNixCu3Ti4O12; and 2) compounding: 2.1) dissolving polyvinylidene fluoride PVDF in N,N-dimethylformamide DMF to obtain a PVDF solution; 2.2) adding the prepared ceramic powder Ca1-xNixCu3Ti4O12 into the PVDF solution, and fully stirring for a period of time, to obtain a gelatinous mixed solution; and 2.3) coating the gelatinous mixed solution, and carrying out drying treatment to obtain the Ca1-xNixCu3Ti4O12/PVDF composite material. The technical problems of low dielectric strength and limited energy storage density of conventional dielectric ceramics are solved. The dielectric loss of theceramic is reduced by replacing the calcium ion in the calcium copper titanate ceramic by Ni dedoping.

Description

technical field [0001] The invention relates to a high dielectric ceramic / PVDF composite material and a preparation method. Background technique [0002] Traditional dielectric materials include inorganic ceramic materials and organic polymer materials. Common inorganic ceramic materials, such as barium titanate (BT), lead zirconate titanate (PZT), etc., have high dielectric constant (several thousand), but their preparation process is complex, brittle, and dielectric loss is large. , and serious energy consumption (preparation process requires high temperature). After they are made into capacitors, mechanical resonance will also occur during charging and discharging, which greatly reduces their service life. Common organic polymer materials include polyethylene (PS), polyvinylidene fluoride (PVDF) and their copolymers such as polyvinylidene fluoride-trifluoroethylene (PVDF Tr, Fe), epoxy resin (exogy), etc. They are flexible Good, low dielectric loss, easy to process, bu...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08K3/22C08J5/18
CPCC08J5/18C08J2327/16C08K3/22
Inventor 蔡会武石凯周文英党智敏田珂
Owner XIAN UNIV OF SCI & TECH
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