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Preparation method of strontium titanate energy storage dielectric ceramic material with high breakdown and high energy storage density

A technology of high energy storage density and energy storage medium, applied in the field of ceramic dielectric energy storage material preparation, can solve the problems of coarse ceramic grains, high production cost, low breakdown strength, etc., and achieve the effect of fine and uniform particles

Active Publication Date: 2021-01-29
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently preparing SrTiO 3 The most commonly used preparation method for ceramic media is the traditional solid-phase method, and the SrTiO prepared by this method 3 Ceramic dielectric ceramics have coarse grains, coarse and uneven grains, low density and impurity defects, etc., resulting in SrTiO 3 Ceramic dielectrics often have low breakdown strength (<200kV / cm), which makes it difficult to meet the requirements of practical applications. In addition, the sintering temperature of this method generally reaches 1400°C and above, resulting in high energy consumption and high production costs.

Method used

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  • Preparation method of strontium titanate energy storage dielectric ceramic material with high breakdown and high energy storage density
  • Preparation method of strontium titanate energy storage dielectric ceramic material with high breakdown and high energy storage density
  • Preparation method of strontium titanate energy storage dielectric ceramic material with high breakdown and high energy storage density

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Experimental program
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Effect test

Embodiment 1

[0031] Step 1: Measure 7mL of butyl titanate with a purity of 99%, drop it into 100mL deionized water with slow stirring, and after the solution forms a white colloidal precipitate, add 18mL nitric acid dropwise into the solution and stir vigorously until it becomes white colloidal The precipitate dissolves completely to form TiO(NO 3 ) 2 clear solution;

[0032] Step 2: take by weighing glycine 23.68g (ie The value is 7) and strontium nitrate 4.29g is added to TiO(NO 3 ) 2 Mix the solution evenly to form a precursor solution, transfer the precursor solution to a 500ml beaker and use a universal furnace to heat, evaporate and concentrate until foaming and burning to obtain carbon-containing nano-SrTiO 3 Ceramic primary powder;

[0033] Step 3: the carbon-containing nano-SrTiO obtained in step 2 3 Put the ceramic primary powder into a muffle furnace at 650°C for 1.5 hours to remove carbon, and the nano-SrTiO after carbon removal 3 Add 0.2mL of PVA solution with a mass f...

Embodiment 2

[0035] Step 1: Measure 7mL of butyl titanate with a purity of 99%, drop it into 100mL deionized water with slow stirring, and after the solution forms a white colloidal precipitate, add 18mL nitric acid dropwise into the solution and stir vigorously until it becomes white colloidal The precipitate dissolves completely to form TiO(NO 3 ) 2 clear solution;

[0036] Step 2: take by weighing glycine 23.68g (ie The value is 7) and strontium nitrate 4.29g is added to TiO(NO 3 ) 2 Mix the solution evenly to form a precursor solution, transfer the precursor solution to a 500ml beaker and use a universal furnace to heat, evaporate and concentrate until foaming and burning to obtain carbon-containing nano-SrTiO 3 Ceramic primary powder;

[0037] Step 3: the carbon-containing nano-SrTiO obtained in step 2 3 Put the ceramic primary powder into a muffle furnace at 650°C for 1.5 hours to remove carbon, and the nano-SrTiO after carbon removal 3 Add 0.2mL of PVA solution with a mass f...

Embodiment 3

[0039] Step 1: Measure 7mL of butyl titanate with a purity of 99%, drop it into 100mL deionized water with slow stirring, and after the solution forms a white colloidal precipitate, add 18mL nitric acid dropwise into the solution and stir vigorously until it becomes white colloidal The precipitate dissolves completely to form TiO(NO 3 ) 2 clear solution;

[0040] Step 2: take by weighing glycine 27.07g (ie The value is 8) and strontium nitrate 4.29g is added to TiO(NO 3 ) 2 Mix the solution evenly to form a precursor solution, transfer the precursor solution to a 500ml beaker and use a universal furnace to heat, evaporate and concentrate until foaming and burning to obtain carbon-containing nano-SrTiO 3 Ceramic primary powder;

[0041] Step 3: the carbon-containing nano-SrTiO obtained in step 2 3 Put the ceramic primary powder into a muffle furnace at 650°C for 1.5 hours to remove carbon, and the nano-SrTiO after carbon removal 3 Add 0.2mL of PVA solution with a mass f...

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Abstract

The invention discloses a preparation method of a strontium titanate energy storage dielectric ceramic material with high breakdown and high energy storage density. The preparation method is characterized by comprising the following steps: 1. dripping butyl titanate into deionized water to form Ti (OH) 4 precipitate, dripping nitric acid into the precipitate drop by drop, and dissolving the precipitate with the least nitric acid to form a TiO (NO3) 2 clear solution; 2, adding glycine and strontium nitrate into the TiO (NO3) 2 solution, uniformly mixing to form a precursor solution, and heating, evaporating and concentrating the precursor solution until the precursor solution is foamed and combusted to obtain carbon-containing nano SrTiO3 ceramic primary powder; and 3, carrying out carbon removal, granulation, compression molding, rubber discharging and sintering on the obtained nano SrTiO3 ceramic primary powder to obtain the SrTiO3 ceramic dielectric material with fine and uniform crystal grains. The preparation method is simple, rapid and low in energy consumption, and the prepared SrTiO3 ceramic is fine and uniform in crystal grain, high in density, high in breakdown strength and large in releasable energy storage density. The process for preparing the strontium titanate energy storage dielectric ceramic material is simple, rapid and convenient, and easy for industrial production.

Description

technical field [0001] The invention belongs to the field of preparation of ceramic dielectric energy storage materials, and in particular relates to a preparation method of strontium titanate dielectric ceramic material with high breakdown and high energy storage density. Background technique [0002] Compared with energy storage devices such as fuel cells, batteries, and supercapacitors, ceramic dielectric capacitors have the characteristics of ultra-high power density, fast charge and discharge, and good temperature stability, so they have been widely studied. With the rapid development of the electronics industry, ceramic dielectric capacitors have penetrated into every corner of the electronic system. Although ceramic dielectric capacitors have high power density, due to their low energy storage density, it is difficult to meet the growing miniaturization and lightweight requirements of modern electronic products. . Therefore, improving the energy storage density has b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/47C04B35/622
CPCC04B35/47C04B35/622C04B2235/48C04B2235/6562Y02E60/13
Inventor 左承阳魏贤华
Owner SOUTHWEAT UNIV OF SCI & TECH
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