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Lead-free ceramic material with high energy storage density and preparation method

A high energy storage density, ceramic material technology, applied in the field of energy storage ceramics, can solve the problems of low energy storage density and energy storage efficiency, limit the actual use of materials, etc., to achieve good dielectric loss, excellent energy storage density and energy storage. Efficiency, effect of high energy storage density

Inactive Publication Date: 2018-03-02
周开珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, lead-free energy storage ceramic materials are mainly concentrated in BaTiO 3 , SrTiO 3 , CaTiO 3 and Bi 0.5 Na 0.5 Ti0 3 However, the energy storage density and energy storage efficiency of these materials are still low, which limits the practical use of these materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Lead-free ceramic material 0.90Ba 0.56 Sr 0.44 Ti 0.93 sn 0.07 o 3 0.10Bi 0.18 Na 0.46 NbO 3 The preparation method is carried out according to the following steps:

[0024] (1) According to the chemical formula Ba 0.56 Sr 0.44 Ti 0.93 sn 0.07 o 3 The metering ratio in weighs the raw material BaCO 3 , SrCO 3 、TiO 2 and SnO 2 , carry out batching; ball mill the raw materials weighed in a planetary ball mill, the ball milling medium used is zirconia balls, the dispersion medium is acetone, and the weight ratio of raw materials: ball milling medium: acetone in the ball milling process is 1:2:1; The rotating speed of the ball mill is 250r / min, and the ball milling time is 10 hours. Ball milling and drying to obtain powder A; pre-calcine powder A in air at 900°C for 10 hours, then grind through a 120-mesh sieve to obtain Ba 0.56 Sr 0.44 Ti 0.93 sn 0.07 o 3 Powder;

[0025] (2) According to the chemical formula Bi 0.18 Na 0.46 NbO 3 The metering ratio...

Embodiment 2

[0031] Lead-free ceramic material 0.88Ba 0.56 Sr 0.44 Ti 0.93 sn 0.07 o 3 0.12Bi 0.18 Na 0.46 NbO 3 The preparation method is carried out according to the following steps:

[0032] (1) According to the chemical formula Ba 0.56 Sr 0.44 Ti 0.93 sn 0.07 o 3 The metering ratio in weighs the raw material BaCO 3 , SrCO 3 、TiO 2 and SnO 2 , carry out batching; ball mill the weighed raw materials in a planetary ball mill, the ball milling medium used is zirconia balls, the dispersion medium is acetone, and the weight ratio of raw materials: ball milling medium: acetone during the ball milling process is 1:2:2; The rotating speed of the ball mill is 250r / min, and the ball milling time is 18 hours. Dry after ball milling to obtain powder A; pre-calcine powder A in air at 920°C for 8 hours, then grind through a 120-mesh sieve to obtain Ba 0.56 Sr 0.44 Ti 0.93 sn 0.07 o 3 Powder;

[0033] (2) According to the chemical formula Bi 0.18 Na 0.46 NbO 3 The metering rat...

Embodiment 3

[0039] Lead-free ceramic material 0.85Ba 0.56 Sr 0.44 Ti 0.93 sn 0.07 o 3 0.15 Bi 0.18 Na 0.46 NbO 3 The preparation method is carried out according to the following steps:

[0040] (1) According to the chemical formula Ba 0.56 Sr 0.44 Ti 0.93 sn 0.07 o 3 The metering ratio in weighs the raw material BaCO 3 , SrCO 3 、TiO 2 and SnO 2 , carry out batching; The raw material that weighs is ball milled in planetary ball mill, and used ball milling medium is zirconia ball, and dispersion medium is acetone, and the weight ratio of raw material in ball milling process: ball milling medium: acetone is 1: 3: 1; The rotating speed of the ball mill is 300r / min, and the ball milling time is 15 hours. Ball milling and drying to obtain powder A; pre-calcine powder A in air at 920°C for 6 hours, then grind through a 120-mesh sieve to obtain Ba 0.56 Sr 0.44 Ti 0.93 sn 0.07 o 3 Powder;

[0041] (2) According to the chemical formula Bi 0.18 Na 0.46 NbO 3 The metering rat...

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Abstract

The invention provides a lead-free ceramic material with high energy storage density and a preparation method, belonging to the technical field of energy storage ceramics. The method of the present invention first carries out batching according to Ba0.56Sr0.44Ti0.93Sn0.07O3 and Bi0.18Na0.46NbO3 respectively, after mixing uniformly by ball milling process, at first carry out pre-calcination, then grind and sieve, then according to chemical formula (1-x) Ba0 .56Sr0.44Ti0.93Sn0.07O3·xBi0.18Na0.46NbO3 ingredients and ball milling, granulation after ball milling, and then compression molding in the mold, and then after debinding treatment, the discharge plasma sintering system is used for primary sintering, and then ordinary high temperature The ceramic material with high energy storage density and high energy storage efficiency is obtained after secondary sintering in the furnace. The preparation method of the invention is simple, and the obtained lead-free ceramic material has higher energy storage density and energy storage efficiency.

Description

【Technical field】 [0001] The invention relates to the technical field of energy storage ceramics, in particular to a lead-free ceramic material with high energy storage density and a preparation method thereof. 【Background technique】 [0002] In recent years, with the continuous development of information technology, high-energy-storage-density dielectric materials are key materials for making small, large-capacity, and high-efficiency capacitors, and they play an increasingly important role in various electronic and power systems. Because the high energy storage density ceramic dielectric capacitor material has the advantages of high energy storage density, fast charge and discharge speed, anti-cycle aging, high mechanical strength, suitable for extreme environments such as high temperature and high pressure, and stable performance, it meets the requirements of new energy development and utilization. It is widely used in many modern fields such as communication, computer, a...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622C04B35/638C04B41/88
CPCC04B35/468C04B35/622C04B35/638C04B41/009C04B41/5116C04B41/88C04B2235/3201C04B2235/3213C04B2235/3251C04B2235/3293C04B2235/3298C04B2235/6562C04B2235/6567C04B41/4539C04B41/0072
Inventor 周开珍
Owner 周开珍
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