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 re

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

Example Embodiment

[0033] Example 1:

[0034] According to AlN powder, sintering aid Y 2 O 3 The proportion of powder mass percentage is 97:3. Weigh appropriate amount of raw materials, and the used AlN, Y 2 O 3 The average particle size of the powder is 2μm. It is milled by a ball mill for 3 hours and then placed in a drying 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 mill tank, according to the powder: alcohol: ZrO 2 Ball = 1:1:4 mass ratio for ball milling, set the ball mill program to stop for 2 minutes every 10 minutes of operation.

[0036] Weigh 8g of the mixed powder and spread it into a graphite mold with an inner diameter of 25mm, such as figure 1 As shown; the sample is pre-pressed for 30s under a pressure of 6MPa and then field-assisted sintering.

[0037] Choose to assist sintering in a nitrogen atmosphere. The specific sintering process is: sintering temper...

Example Embodiment

[0038] Example 2:

[0039] According to AlN powder, sintering aid MgO, Y 2 O 3 The mass percentage is 94:3:3. Weigh appropriate amount of raw materials. AlN, MgO, Y are used 2 O 3 The average particle size of the powder is 2μm. It is milled by a ball mill for 3 hours and then placed in a drying 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 mill tank, according to the powder: alcohol: ZrO 2 Ball = 1:1:4 mass ratio for ball milling, set the ball mill program 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 under a pressure of 6MPa for 30 seconds and then hot-pressed and sintered.

[0042] Hot press sintering under nitrogen atmosphere is selected. The specific sintering process is: sintering temperature 1550℃, heating rate 10℃ / min, holding time 120min, axial pressure 30MPa, a...

Example Embodiment

[0043] Example 3:

[0044] According to AlN powder, BN powder, sintering aid Y 2 O 3 The mass percentage is 82.4:14.6:3. Weigh an appropriate amount of raw materials, the AlN, BN, Y used 2 O 3 The average particle size of the powder is 2μm. It is milled by a ball mill for 3 hours and then placed in a drying 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 mill tank, according to the powder: alcohol: ZrO 2 Ball = 1:1:4 mass ratio for ball milling, set the ball mill program 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 under a pressure of 6MPa for 30 seconds and then hot-pressed and sintered.

[0047] Select hot-press sintering under nitrogen atmosphere, the specific sintering process is: sintering temperature 1600℃, heating rate 10℃ / min, holding time 120min, axial pressure ...

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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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