Strontium titanate-based lead-free high-energy storage density and high-energy storage efficiency ceramic material and preparation method thereof

A lead-free-based technology with high storage and energy storage efficiency is applied in the field of strontium titanate-based lead-free high-energy-storage-density and high-energy-storage-efficiency ceramic materials and their preparation fields, and can solve the problems of low energy storage density, low saturation polarization, Limiting applications and other issues, achieving high energy storage density, improving energy storage density and energy storage efficiency, and excellent energy storage characteristics

Active Publication Date: 2017-05-24
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

SrTiO 3 Ceramic is an excellent dielectric material with high dielectric constant, low dielectric loss, good temperature stability and high breakdown field s

Method used

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  • Strontium titanate-based lead-free high-energy storage density and high-energy storage efficiency ceramic material and preparation method thereof
  • Strontium titanate-based lead-free high-energy storage density and high-energy storage efficiency ceramic material and preparation method thereof
  • Strontium titanate-based lead-free high-energy storage density and high-energy storage efficiency ceramic material and preparation method thereof

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Example Embodiment

[0055] The preparation method of the high energy storage density and energy storage efficiency dielectric ceramic material of the present invention comprises the following steps:

[0056] (1) According to the chemical formula SrTiO 3 Analytically pure SrCO 3 , TiO 2 After preparation, using absolute ethanol as a medium, mixing uniformly by ball milling, then drying at 100 ° C, passing through a 120-mesh sieve, briquetting, and pre-burning at 1150-1200 ° C for 3-5 hours to obtain a blocky solid, and then Pulverize the massive solid and pass it through a 120-mesh sieve to obtain SrTiO 3 powder;

[0057] (2) According to the chemical formula 0.65BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 Analytically pure BaCO 3 , Na 2 CO 3 , Bi 2 O 3 , TiO 2 After preparation, using absolute ethanol as the medium, mixing uniformly by ball milling, then drying at 100 ° C, passing through a 120-mesh sieve, briquetting, and pre-burning at 900-950 ° C for 3-5 hours to obtain a blocky solid, and t...

Example Embodiment

[0068] Example 1:

[0069] The chemical formula of strontium titanate-based lead-free ceramic material with high energy storage density and high energy storage efficiency is: (1-x)SrTiO 3 -x(0.65BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 ), where x is 0.65BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 The mole percent of , and x=0.1.

[0070] The preparation method of the above-mentioned strontium titanate-based lead-free ceramic material with high energy storage density and high energy storage efficiency, comprising the following steps:

[0071] (1) According to the chemical formula SrTiO 3 Analytically pure SrCO 3 , TiO 2 After preparation, it was mixed evenly by ball milling for 24 hours, then dried at 100°C, passed through a 120-mesh sieve, pressed into pieces, and pre-fired at 1150°C for 4 hours to obtain a blocky solid, which was then pulverized and passed through a 120-mesh sieve , to get SrTiO 3 powder;

[0072] (2) According to the chemical formula 0.65BaTiO 3 -0.35Bi 0.5 Na ...

Example Embodiment

[0078] Example 2:

[0079] The chemical formula of strontium titanate-based lead-free ceramic material with high energy storage density and high energy storage efficiency is: (1-x)SrTiO 3 -x(0.65BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 ), where x is 0.65BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 The mole percent of , and x=0.2.

[0080] The preparation method of the above-mentioned strontium titanate-based lead-free ceramic material with high energy storage density and high energy storage efficiency, comprising the following steps:

[0081] (1) According to the chemical formula SrTiO 3 Analytically pure SrCO 3 , TiO 2 After preparation, it was mixed evenly by ball milling for 23 hours, then dried at 100°C, passed through a 120-mesh sieve, pressed into pieces, and pre-fired at 1175°C for 4 hours to obtain a blocky solid, which was then pulverized and passed through a 120-mesh sieve , to get SrTiO 3 powder;

[0082] (2) According to the chemical formula 0.65BaTiO 3 -0.35Bi 0.5 Na ...

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Abstract

The invention relates to a strontium titanate-based lead-free high-energy storage density and high-energy storage efficiency ceramic material and a preparation method thereof. The preparation method comprises the following steps: firstly batching according to a chemical formula (1-x)SrTiO3-x(0.65BaTiO3-0.35Bi0.5Na0.5TiO3), wherein x represents a molar fraction and is greater than or equal to 0.1 but less than or equal to 0.6; ball-milling and drying to obtain a raw material powder body; adding the obtained raw material powder body into a bonding agent for pelleting, decaying for 24-48 hours, pressing into a sheet, performing glue removal treatment and sintering at a temperature of 1250-1350 DEG C to obtain the strontium titanate-based lead-free high-energy storage density and high-energy storage efficiency ceramic material. The ceramic material provided by the invention is simple and stable in preparation process, suitable for industrial production and excellent in energy storage characteristics, the energy storage density calculated based on a ferroelectric hysteresis loop is 0.961-1.403 J/cm<3>, and the energy storage efficiency is 84.77-91.63 percent.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of dielectric materials for energy storage capacitors, in particular to a strontium titanate-based lead-free ceramic material with high energy storage density and high energy storage efficiency and a preparation method thereof. [0003] 【Background technique】 [0004] With the continuous development of information technology, the miniaturization and multi-functionalization of devices, ceramics with high energy storage density and high energy storage efficiency are the key materials for making small, large-capacity, and high-efficiency capacitors. Because high energy storage density ceramic capacitors have 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, they meet the requirements of new energy development and utilization, and a...

Claims

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Application Information

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IPC IPC(8): C04B35/47C04B35/622
CPCC04B35/47C04B35/622C04B2235/3201C04B2235/3213C04B2235/3215C04B2235/3232C04B2235/3236C04B2235/3298C04B2235/96
Inventor 杨海波闫非林营高淑雅朱建锋王芬
Owner SHAANXI UNIV OF SCI & TECH
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