Tabular sodium bismuth titanate/polyvinylidene fluoride composite material and preparation method thereof

A technology of polyvinylidene fluoride and sodium bismuth titanate is applied in the directions of titanate, titanium compound, chemical instruments and methods, etc., to achieve the effect of expanding the scope of application and reducing the probability of failure

Inactive Publication Date: 2019-08-30
SHAANXI UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Sodium bismuth titanate (abbreviated as NBT) is a high dielectric ceramic, which belongs to two-dimensional sheet filler. In theory, it can form a dielectric composite material with polyvinylidene fluoride (abbreviated as PVDF), so that A composite material with large energy storage density has been obtained, but the composite material of sodium bismuth titanate and polyvinylidene fluoride has not been reported yet

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  • Tabular sodium bismuth titanate/polyvinylidene fluoride composite material and preparation method thereof
  • Tabular sodium bismuth titanate/polyvinylidene fluoride composite material and preparation method thereof
  • Tabular sodium bismuth titanate/polyvinylidene fluoride composite material and preparation method thereof

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preparation example Construction

[0037] A preparation method of a textured plate-shaped sodium bismuth titanate / polyvinylidene fluoride composite material comprises the following steps,

[0038] Step 1, prepare the plate-like Na 0.5 Bi 4.5 Ti 4 o 15 ;

[0039] Weigh Na proportionally 2 CO 3 、 Bi 2o 3 、TiO 2 and NaCl, where Na 2 CO 3 、 Bi 2 o 3 , and TiO 2 The mass ratio of the composed oxide to NaCl ranges from 0.5 to 1; these four kinds of mixtures, zirconia ball stones, and absolute ethanol are added to the ball mill tank according to the mass ratio of 1:2:1, and the absolute ethanol is submerged Na 2 CO 3 、 Bi 2 o 3 、TiO 2 , NaCl, zirconia balls, and spheroidal ink for 4 to 12 hours, and dry; put the dried mixture into a crucible for calcination, the temperature is between 900 and 1100 ° C, and the time is between 2 and 8 hours; the calcined product Grind and sieve into a beaker, wash with 80-90°C deionized water for 7-10 times to remove Cl - Remove it clean, and generally use silver ni...

Embodiment 1

[0052] A preparation method of a textured plate-shaped sodium bismuth titanate / polyvinylidene fluoride composite material comprises the following steps,

[0053] Step 1, prepare the plate-like Na 0.5 Bi 4.5 Ti 4 o 15 ;

[0054] Weigh Na proportionally 2 CO 3 、 Bi 2 o 3 、TiO 2 and NaCl, where Na 2 CO 3 、 Bi 2 o 3 , and TiO 2 The mass ratio of the formed oxide to NaCl is 0.5; these four kinds of mixtures, zirconia ball stone, and absolute ethanol are added to the ball milling tank according to the mass ratio of 1:2:1, and the absolute ethanol has submerged the NaCl at this time. 2 CO 3 、 Bi 2 o 3 、TiO 2 , NaCl and zirconia balls, spheroidal graphite for 4 hours, and dried; put the dried mixture into a crucible for calcination at a temperature of 900°C for 8 hours; grind the calcined product and sieve it into a beaker, Cl was washed seven times with deionized water at 80°C - Remove it clean, and generally use silver nitrate solution to test Cl - Whether it is ...

Embodiment 2

[0063] A preparation method of a textured plate-shaped sodium bismuth titanate / polyvinylidene fluoride composite material comprises the following steps,

[0064] Step 1, prepare the plate-like Na 0.5 Bi 4.5 Ti 4 o 15 ;

[0065] Weigh Na proportionally 2 CO 3 、 Bi 2 o 3 、TiO 2 and NaCl, where Na 2 CO 3 、 Bi 2 o 3 , and TiO 2 The mass ratio of the formed oxide to NaCl is 1; these four kinds of mixtures, zirconia balls, and absolute ethanol are added to the ball mill jar according to the mass ratio of 1:2:1, and the absolute ethanol has submerged the NaCl at this time. 2 CO 3 、 Bi 2 o 3 、TiO 2 , NaCl and zirconia balls, spheroidal graphite for 8 hours, and dried; put the dried mixture into a crucible for calcination at a temperature of 1100°C for 2 hours; grind the calcined product and sieve it into a beaker, Cl was washed 10 times with deionized water at 85°C - Remove it clean, and generally use silver nitrate solution to test Cl - Whether it is removed compl...

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Abstract

The invention relates to a tabular sodium bismuth titanate/polyvinylidene fluoride composite material and a preparation method thereof. The method comprises the following steps: step 1, calcining Na2CO3, Bi2O3, TiO2 and NaCl at 900-1100 DEG C for 2-8 h; step 2, removing Cl- in an obtained mixture A, drying and then grinding uniformly; step 3, adding an ethanol solution, then drying, adding dopamine hydrochloride and hydrochloric acid, reacting and then drying a product to obtain dopamine-coated tabular sodium bismuth titanate powder; step 4, adding the dopamine-coated tabular sodium bismuth titanate powder into a solution prepared from polyvinylidene fluoride, preparing a compound of the tabular sodium bismuth titanate powder and polyvinylidene fluoride through a tape casting method, and drying to obtain a compound A; step 5, drying the compound A and then quenching; the composite material is maintained at relatively high breakdown field strength, and has large energy density under thesame breakdown field strength compared with pure polyvinylidene fluoride.

Description

technical field [0001] The invention relates to the technical field of textured composite materials, in particular to a plate-shaped sodium bismuth titanate / polyvinylidene fluoride composite material and a preparation method thereof. Background technique [0002] The dielectric composite material formed by high dielectric ceramics and polymers is of great significance to energy storage materials. High dielectric ceramics have high dielectric constants, and polymers have high breakdown field strength. When high dielectric ceramics and polymers After compounding, the obtained composite material has these two characteristics at the same time, thus obtaining a large energy storage density. [0003] In recent years, the research on two-dimensional lamellar fillers is also a hot spot. This kind of lamellar structure is generally considered to have a space blocking effect when it is combined with a polymer, which can effectively prevent the expansion of the electrical tree in the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K9/10C08K7/00C01G23/00
CPCC01G23/003C01P2004/20C08K7/00C08K9/10C08L2203/20C08L27/16
Inventor 王卓王枭颖李银博陈浩楠孔梦蕾易志辉
Owner SHAANXI UNIV OF SCI & TECH
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