Preparation method for modified barium titanate ceramics

A barium titanate and modification technology is applied in the field of preparation of modified barium titanate ceramics, which can solve the problems of large fluctuation of dielectric coefficient, low qualified rate of finished products, uneven sintering, etc., and achieves low labor intensity and fine particle size. , saving time and money

Active Publication Date: 2016-12-21
ZHEJIANG JIUKANG ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this kind of solid phase sintering to prepare modified barium titanate ceramics has uneven sintering, which makes the qualified rate of the sintered finished product too low, and it is very likely that the dielectric coefficient fluctuates greatly with temperature.

Method used

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  • Preparation method for modified barium titanate ceramics
  • Preparation method for modified barium titanate ceramics
  • Preparation method for modified barium titanate ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for modifying barium titanate ceramics suitable for supercapacitors, the specific preparation method is as follows:

[0042] 1. Select 8.13kg of tin dioxide, 5.955kg of calcium carbonate, 5.955kg of barium carbonate, 0.615kg of titanium dioxide, and 0.3kg of titanium dioxide and put them into the mixer for uniform mixing for 2 hours to obtain the auxiliary material mixture;

[0043]2. Take out the auxiliary material mixture and put it into the sagger for vibration and vibration, so that the material is fully dense. Poke out evenly honeycomb-shaped exhaust ports on the auxiliary material mixture, and then put it into the muffle furnace for sintering. When sintering, the initial The temperature is normal temperature, and the highest temperature is 1400°C. When the normal temperature is -1100°C, the heating rate is controlled to be 400°C / h, and when the temperature is 1100°C-1400°C, the heating rate is controlled to be 300°C / h. And heat preservation at 1100°C for ...

Embodiment 2

[0053] A method for modifying barium titanate ceramics suitable for supercapacitors, the specific preparation method is as follows:

[0054] 1. Select 8.13kg of tin dioxide, 5.955kg of calcium carbonate, 5.955kg of barium carbonate, 0.615kg of titanium dioxide, and 0.3kg of titanium dioxide and put them into the mixer for uniform mixing for 2 hours to obtain the auxiliary material mixture;

[0055] 2. Take out the auxiliary material mixture and put it into the sagger for vibration and vibration, so that the material is fully dense. Poke out evenly honeycomb-shaped exhaust ports on the auxiliary material mixture, and then put it into the muffle furnace for sintering. When sintering, the initial The temperature is normal temperature, the highest temperature is 1400°C, the controlled heating rate is 400°C / h when the normal temperature is -1100°C, and the controlled heating rate is 300°C / h when the temperature is 1100°C-1400°C. And heat preservation at 1100°C for 90 minutes, and h...

Embodiment 3

[0065] A method for modifying barium titanate ceramics suitable for supercapacitors, the specific preparation method is as follows

[0066] 1. Select 8.13kg of tin dioxide, 5.955kg of calcium carbonate, 5.955kg of barium carbonate, 0.615kg of titanium dioxide, and 0.3kg of titanium dioxide and put them into the mixer for uniform mixing for 2 hours to obtain the auxiliary material mixture;

[0067] 2. Take out the auxiliary material mixture and put it into the sagger for vibration and vibration to make the material fully dense. Poke out evenly honeycomb-shaped exhaust ports on the auxiliary material mixture, and then put it into the muffle furnace for sintering. The initial temperature during sintering is Normal temperature, the maximum temperature is 1400°C, the control heating rate is 400°C / h when the normal temperature is -1100°C, and the control heating rate is 300°C / h when the temperature is 1100°C-1400°C. And heat preservation at 1100°C for 90 minutes, and heat preservat...

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Abstract

The invention discloses a preparation method for modified barium titanate ceramics suitable for a super capacitor, wherein the preparation method comprises the following steps: step a, auxiliary material preparation: selecting SnO2, CaCO3, BaCO3 and TiO2 and mixing evenly in proportion to obtain an auxiliary material mixture, putting the auxiliary material mixture in a muffle furnace, sintering for a first time, taking out the material, and crushing the material to obtain an auxiliary material, wherein the granularity of the auxiliary material is 3-5 [mu]m; step b, raw material preparation: selecting BaCO3 and TiO2 and mixing, then putting the mixture into the muffle furnace, sintering for a second time, and crushing the product after sintering to obtain a fine powder material; and step c, raw material modification: selecting the auxiliary material and the fine powder material and mixing, putting the mixture into the muffle furnace, sintering for a third time, and crushing the product after sintering for the third time to obtain a finished product. The method has the beneficial effects that the process is simple, the cost is saved, fluctuation of the dielectric coefficient is smooth along with temperature variation, the granularity is relatively fine, and the stable composite material is convenient to synthesize.

Description

technical field [0001] The invention relates to a preparation method of modified barium titanate ceramics. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection. As a ferroelectric material, barium titanate is one of the most widely used materials in electronic ceramics. However, if the direct production of power supply and electronic power supply system products directly uses barium titanate ceramics, there are certain defects. First, the dielectric coefficient of barium titanate fluctuates too much with temperature. Second, the higher the dielectric coefficient, the greater the dielectric loss. Two characteristics directly affect the service life, stability and safety of capacitors using barium titanate as raw material. Therefore, it must be doped with modified materials before it can play a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/64C04B35/626
CPCC04B35/468C04B35/62605C04B35/64C04B2235/3208C04B2235/3293C04B2235/5436C04B2235/656C04B2235/96
Inventor 王树昱
Owner ZHEJIANG JIUKANG ELECTRIC
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