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Lead-free ceramic material with high energy density and charging and discharging properties and preparation method of lead-free ceramic material

A technology with charge-discharge performance and high energy storage density, applied in the field of functional ceramic materials, can solve the problems of decreased current density and power density, low energy storage effect of barium titanate-based materials, and reduced cycle life of capacitors, etc., and achieves good temperature stability. sexual effect

Active Publication Date: 2018-08-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But lead-based antiferroelectric materials have the following problems: 1. Lead-based antiferroelectric materials contain toxic Pb, which pollutes the environment in the process of making and producing
2. The Curie temperature of lead-based antiferroelectric ceramics is generally low. When the temperature exceeds the Curie temperature, its energy storage density, current density and power density will drop significantly, and its temperature dependence is strong
3. The antiferroelectric-ferroelectric transition electric field of antiferroelectric materials is generally large, which will reduce the cycle life of capacitors
In summary, the energy storage effect of barium titanate-based materials is relatively low
In addition, the research work of barium titanate energy storage materials is mainly focused on improving its energy storage density, but there are few reports on the charge and discharge characteristics of barium titanate-based relaxor ferroelectric ceramics.

Method used

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  • Lead-free ceramic material with high energy density and charging and discharging properties and preparation method of lead-free ceramic material
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  • Lead-free ceramic material with high energy density and charging and discharging properties and preparation method of lead-free ceramic material

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Experimental program
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Embodiment 1

[0028] The preparation method of the lead-free ceramic material with high energy storage density and charge-discharge performance adopts the following steps:

[0029] (1) Select the national medicine reagent BaCO with a purity greater than 99% 3 , TiO 2 , Bi 2 o 3 , Na 2 CO 3 , In 2 o 3 , ZrO 2 As a raw material for lead-free ceramic materials. According to the chemical formula 0.9BaTiO 3 -0.1 (Bi 0.9 Na 0.1 )(In 0.8 Zr 0.2 )O 3 Weigh the material, add absolute ethanol and zirconia balls into the nylon tank for ball milling, discharge, and dry. The ball milling time was 8 hours, and the drying temperature was 120°C. Put the dried powder into a corundum crucible, cover the crucible after compaction, put it into a muffle furnace for calcination, raise it to 950°C at 5°C / min, keep it warm for 3 hours, cool it down to room temperature, and take it out with a grinder. Grinding in a bowl, and calcining in a corundum crucible again, the heating rate and holding time are...

Embodiment 2

[0037] The preparation method of the lead-free ceramic material with high energy storage density and charge-discharge performance adopts the following steps:

[0038] (1) Select the national medicine reagent BaCO with a purity greater than 99% 3 , TiO 2 , Bi 2 o 3 , Na 2 CO 3 , In 2 o 3 , ZrO 2 As a raw material for lead-free ceramic materials. According to the chemical formula 0.9BaTiO 3 -0.1 (Bi 0.9 Na 0.1 )(In 0.8 Zr 0.2 )O 3 Weigh the material, add absolute ethanol and zirconia balls into the nylon tank for ball milling, discharge, and dry. The ball milling time was 8 hours, and the drying temperature was 120°C. Put the dried powder into a corundum crucible, cover the crucible after compaction, put it into a muffle furnace for calcination, raise it to 950°C at 5°C / min, keep it warm for 2 hours, cool it to room temperature, and take it out with a grinder. Grinding in a bowl, and calcining in a corundum crucible again, the heating rate and holding time are th...

Embodiment 3

[0046] The preparation method of the lead-free ceramic material with high energy storage density and charge-discharge performance adopts the following steps:

[0047] (1) Select the national medicine reagent BaCO with a purity greater than 99% 3 , TiO 2 , Bi 2 o 3 , Na 2 CO 3 , In 2 o 3 , ZrO 2 As a raw material for lead-free ceramic materials. According to the chemical formula 0.9BaTiO 3 -0.1 (Bi 0.9 Na 0.1 )(In 0.8 Zr 0.2 )O 3 Weigh the material, add absolute ethanol and zirconia balls into the nylon tank for ball milling, discharge, and dry. The ball milling time was 8 hours, and the drying temperature was 120°C. Put the dried powder into a corundum crucible, cover the crucible after compaction, put it into a muffle furnace for calcination, raise it to 950°C at 5°C / min, keep it warm for 3 hours, cool it down to room temperature, and take it out with a grinder. Grinding in a bowl, and calcining in a corundum crucible again, the heating rate and holding time a...

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Abstract

The invention relates to a lead-free ceramic material with high energy density and charging and discharging properties and a preparation method of the lead-free ceramic material. The composition of the ceramic is (1-x) BaTiO3-x(Bi0.9Na0.1) (In1-yZry)O3 (0< / = x< / = 0.2, 0.1< / = y< / = 0.3), and the ceramic is obtained by a common sintering method. Compared with a lead-based antiferroelectricity material, the material disclosed by the invention does not contain lead, and is an environmentally friendly material. Compared with an antiferroelectricity material, the system disclosed by the invention hasquite high energy storage density, current density and power density, and has microsecond charging and discharging time. By the characteristic, application of a pulse type capacitor is greatly facilitated. The material is simple in manufacturing process, has excellent charging and discharging properties, and is suitable for being used on a high-voltage pulse capacity with requirements on energy storage and charging and discharging characteristics.

Description

technical field [0001] The invention belongs to the technical field of functional ceramic materials, and in particular relates to a lead-free ceramic material with high energy storage density and charge-discharge performance and a preparation method thereof. Background technique [0002] The pulse capacitor can store the charging energy of a small power supply to the capacitor in a long time interval, and release the stored energy quickly in a very short time interval at a certain moment of need, forming a strong current and Power, which is mainly used in high voltage test technology, high energy physics, laser technology, oscillation circuit, geological prospecting and other fields. With the continuous development of accelerators, lasers, electron beams, etc., people's demand for high-voltage pulse and high-current generators is increasing. Although the battery has a high energy density, its power density is often low due to the slow movement of carriers in it. Although t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/64
CPCC04B35/4682C04B35/64C04B2235/3201C04B2235/3244C04B2235/3286C04B2235/3298C04B2235/6562C04B2235/661
Inventor 翟继卫李峰沈波
Owner TONGJI UNIV
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