Ceramic material for active metal high-temperature steam sealing and protection and preparation method thereof

A technology of ceramic material and active metal, which is applied in the field of ceramic material and preparation of active metal high-temperature vapor, and achieves the effects of low cost, promotion of industrialization, and improvement of service life

Inactive Publication Date: 2020-01-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a ceramic material with strong high temperature stability, corrosion resistance and insulation sealing performance and its The preparation method avoids the device failure problem caused by the leakage of active metal vapor

Method used

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  • Ceramic material for active metal high-temperature steam sealing and protection and preparation method thereof
  • Ceramic material for active metal high-temperature steam sealing and protection and preparation method thereof
  • Ceramic material for active metal high-temperature steam sealing and protection and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] According to AlN powder, sintering aid Y 2 o 3The mass percentage of the powder is 97:3, and an appropriate amount of raw materials is weighed, and the used AlN, Y 2 o 3 The average particle size of the powder is 2 μm, and the powder is milled for 3 hours by a ball mill, and then dried in an oven at 80° C. for 12 hours. The ball mill adopts Retsch PM100, the same below.

[0035] The ball milling process is as follows: put the raw material powder into a 125ml nylon ball milling tank, according to powder: alcohol: ZrO 2 The mass ratio of balls = 1:1:4 is used for ball milling, and the program of the ball mill is set to stop for 2 minutes every 10 minutes of operation.

[0036] Weigh 8g of mixed powder and spread it into a graphite mold with an inner diameter of 25mm, such as figure 1 Shown; the samples were pre-compressed at 6 MPa for 30 s before field-assisted sintering.

[0037] Field-assisted sintering is selected under nitrogen atmosphere. The specific sintering...

Embodiment 2

[0039] According to AlN powder, sintering aid MgO, Y 2 o 3 The proportion by mass percentage is 94:3:3, and the appropriate amount of raw materials is weighed, and the used AlN, MgO, Y 2 o 3 The average particle size of the powder is 2 μm, and the powder is milled for 3 hours by a ball mill, and then dried in an oven at 80° C. for 12 hours.

[0040] The ball milling process is as follows: put the raw material powder into a 125ml nylon ball milling tank, according to powder: alcohol: ZrO 2 The mass ratio of balls = 1:1:4 is used for ball milling, and the program of the ball mill is set to stop for 2 minutes every 10 minutes of operation.

[0041] Weigh 8g of the mixed powder and spread it into a graphite mold with an inner diameter of 25mm. The sample is pre-pressed at 6MPa for 30s and then hot-pressed and sintered.

[0042] Hot-pressing sintering under nitrogen atmosphere is selected, and the specific sintering process is: sintering temperature 1550°C, heating rate 10°C / mi...

Embodiment 3

[0044] According to AlN powder, BN powder, sintering aid Y 2 o 3 The ratio of mass percentage is 82.4:14.6:3 Weigh appropriate amount of raw materials, used AlN, BN, Y 2 o 3 The average particle size of the powder is 2 μm, and the powder is milled for 3 hours by a ball mill, and then dried in an oven at 80° C. for 12 hours.

[0045] The ball milling process is as follows: put the raw material powder into a 125ml nylon ball milling tank, according to powder: alcohol: ZrO 2 The mass ratio of balls = 1:1:4 is used for ball milling, and the program of the ball mill is set to stop for 2 minutes every 10 minutes of operation.

[0046] Weigh 8g of the mixed powder and spread it into a graphite mold with an inner diameter of 25mm. The sample is pre-pressed at 6MPa for 30s and then hot-pressed and sintered.

[0047] Hot-pressing sintering under nitrogen atmosphere is selected. The specific sintering process is as follows: sintering temperature 1600°C, heating rate 10°C / min, holding...

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Abstract

The invention relates to an insulating ceramic material for sealing high-temperature steam of active metals such as Li, Na, K and the like, the ceramic material comprises AlN, Si3N4 and BN, and the active metals comprise Li, Na, K and the like. The preparation method of the material comprises the following steps: using a hot-pressing sintering or field-assisted sintering mode, adding different sintering aids and optimizing a sintering process to finally obtain the ceramic material for sealing the high-temperature steam of active metals such as Li, Na and K, the bending strength is greater than300MPa, the helium leakage rate is less than 1 * 10 <-10 > Pa.m < 3 > / s, the volume resistivity is greater than 1 * 10 < 10 > omega.cm, and the use temperature is 0-1000 DEG C. The nitride ceramic material is applied to sealing and protection of the high-temperature battery for the first time, has the advantages of simple process, low cost, high practicability and the like, and can effectively prolong the service life of the high-temperature battery.

Description

technical field [0001] The invention belongs to the field of sealing materials, in particular to a ceramic material used for sealing high-temperature vapors of active metals such as Li, Na, and K, and a preparation method thereof. [0002] technical background [0003] Energy, resources and the environment are the three elements of the development of human society. With the development of social science and technology and the improvement of productivity, energy issues are increasingly becoming a bottleneck restricting the sustainable development of social economy. The effective use of renewable clean energy such as solar energy and wind energy to generate electricity is the fundamental way for human beings to deal with the increasingly prominent energy crisis and the pollution of the ecological environment caused by traditional fossil fuels. However, solar energy and wind energy are intermittent energy sources that are unstable, discontinuous, and Seasonal changes and other ...

Claims

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Application Information

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IPC IPC(8): C04B35/581C04B35/583C04B35/584C04B35/622C04B35/64H01M2/08
CPCC04B35/581C04B35/583C04B35/584C04B35/622C04B35/64C04B2235/3201C04B2235/3206C04B2235/3225H01M50/183Y02E60/10
Inventor 陈斐贾明勇李耘字吴玥奇沈强张联盟
Owner WUHAN UNIV OF TECH
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