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Rare earth doped niobate-based glass ceramic material with high energy storage density and preparation method and application thereof

A technology of high energy storage density and glass ceramics, which is applied in the field of dielectric energy storage materials, can solve the problems of low energy storage density of energy storage materials, achieve the effects of simple preparation method, increase energy storage density, and reduce defect concentration

Inactive Publication Date: 2020-07-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the preparation method of the above patent is simple, the energy storage density of the prepared energy storage material is relatively low

Method used

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  • Rare earth doped niobate-based glass ceramic material with high energy storage density and preparation method and application thereof
  • Rare earth doped niobate-based glass ceramic material with high energy storage density and preparation method and application thereof
  • Rare earth doped niobate-based glass ceramic material with high energy storage density and preparation method and application thereof

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preparation example Construction

[0040] A method for preparing a rare earth-doped niobate-based glass-ceramic material with high energy storage density, comprising the following steps:

[0041] 1) with BaCO 3 、 Bi 2 o 3 、Na 2 CO 3 , Nb 2 o 5 , SiO 2 , R 2 o 3 , MnO 2 As raw material, the molar ratio is 21.6BaCO 3 -2.4Bi 2 o 3 -6Na 2 CO 3 -30Nb 2 o 5 -40SiO 2 -xR 2 o 3 -yMnO 2 Ingredients, where x and y represent the molar ratio of each component, respectively 0≤x≤1, 0≤y≤1, R is one of La, Gd, Yb, after mixing evenly, control the temperature at 1450-1550 Melt at high temperature for 1-2 hours at ℃ to make high temperature molten slurry;

[0042]2) Pour the high-temperature molten slurry prepared in step 1) into a mold preheated at 600-650°C to form and maintain the preheating temperature for 5-6 hours to remove the residual stress in the glass to prepare a transparent uniform glass, and slice it to obtain glass flakes ;

[0043] 3) Perform controlled crystallization on the glass flakes p...

Embodiment 1

[0046] A rare earth-doped niobate-based glass-ceramic material with high energy storage density is prepared by the following steps:

[0047] 1) BaCO with a purity greater than 99wt% 3 、 Bi 2 o 3 、Na 2 CO 3 , Nb 2 o 5 , SiO 2 , La 2 o 3 For raw material ingredients, the molar ratio between the components is 21.6:2.4:6:30:40:x, after ball milling for 24 hours, drying at 100°C for 6 hours, melting at 1550°C for 2 hours , obtain high-temperature molten slurry; Wherein x=0,0.1,0.2,0.5,1, above-mentioned ball milling process is medium with absolute ethanol, and ball-to-material ratio is 1.5:1;

[0048] 2) pouring the high-temperature molten slurry prepared in step 1) into a square metal mold, annealing under stress at 650° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 1.0-1.5 mm;

[0049] 3) Put an equal amount of the glass flakes prepared in step 2) into a crucible, heat to 950°C at a heating rate of 3°C / min, and keep warm for 5h to obtain a ...

Embodiment 2

[0052] A rare earth-doped niobate-based glass-ceramic material with high energy storage density is prepared by the following steps:

[0053] 1) BaCO with a purity greater than 99wt% 3 、 Bi 2 o 3 、Na 2 CO 3 , Nb 2 o 5 , SiO 2 、Gd 2 o 3 For raw material ingredients, the molar ratio between the components is 21.6:2.4:6:30:40:0.2. After ball milling for 24 hours, dry at 100°C for 6 hours, and melt at 1550°C for 2 hours. , to obtain a high-temperature molten slurry; wherein the above-mentioned ball milling process takes absolute ethanol as a medium, and the ball-to-material ratio is 1.5:1;

[0054] 2) pouring the high-temperature molten slurry prepared in step 1) into a square metal mold, annealing under stress at 650° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 1.0-1.5 mm;

[0055] 3) Put an equal amount of the glass flakes prepared in step 2) into a crucible, heat to 950°C at a heating rate of 3°C / min, and keep warm for 5h to obtain a nio...

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Abstract

The invention relates to a rare earth doped niobate-based glass ceramic material with high energy storage density and a preparation method and application thereof. The material is 21.6BaCO3-2.4Bi2O3-6Na2CO3-30Nb2O5-40SiO2-xR2O3-yMnO2, the preparation method comprises the following steps: uniformly mixing the raw materials, and sequentially carrying out high-temperature melting, slicing and controlled crystallization to obtain the niobate-based glass ceramic material. The prepared material can be used as an energy storage capacitor material. Compared with the prior art, the glass ceramic energystorage material prepared by the invention has the advantages of high dielectric constant (-107), high breakdown field strength (-2158.14 kV / cm), high energy storage density (-22.06 J / cm <3>), low loss (-0.003), good temperature stability and the like.

Description

technical field [0001] The invention belongs to the technical field of dielectric energy storage materials, and relates to a rare earth-doped niobate-based glass ceramic material with high energy storage density and a preparation method and application thereof. Background technique [0002] With the development of social industry, the demand for energy continues to increase. Facing the energy crisis, the problems of improving the efficiency of traditional energy utilization and developing new energy have become increasingly prominent. In order to meet the application needs of the energy field, energy storage devices are developing towards miniaturization and light weight. In order to reduce the volume of the device, it is necessary to increase the energy storage density per unit volume of the device. For this reason, the development and application of high energy storage density dielectrics have attracted much attention. In order to meet the requirements of high energy stora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03B32/02
CPCC03B32/02C03C10/00
Inventor 沈波陈开开翟继卫
Owner TONGJI UNIV
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