A kind of high-temperature connecting agent and its connecting method for alumina ceramic connection

A kind of technology of alumina ceramics and connecting agent, which is applied in the field of ceramic materials, can solve the problems of reducing the high-temperature oxidation resistance and corrosion resistance of materials, the low temperature of connecting materials, and the limitation of high-temperature resistance of connecting test pieces, etc., and achieve high interface bonding strength , Improve the interface bonding strength and ensure the effect of high temperature stability

Active Publication Date: 2022-06-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above schemes can realize the connection of alumina ceramics, the melting point of the connection material or the temperature at which the liquid phase is generated is relatively low, which greatly limits the high temperature resistance of the connection test piece.
At the same time, when the alloy is used as the connecting material, there are also disadvantages of reducing the high temperature oxidation resistance and corrosion resistance of the material.

Method used

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  • A kind of high-temperature connecting agent and its connecting method for alumina ceramic connection
  • A kind of high-temperature connecting agent and its connecting method for alumina ceramic connection

Examples

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Effect test

Embodiment 1

[0030] The present embodiment provides a high-temperature connecting agent for connecting alumina ceramics and a connecting method thereof, which specifically includes the following steps:

[0031] Step 1: Take Al with an average particle size of 0.1 μm and a chemical purity greater than 99.0% 2 O 3 Powder, TiO 2 Powder and Ta 2 O 5 Powder, according to the mass fraction of 97% Al 2 O 3 Powder, 3% TiO 2 Powder ball milling and mixing; ball milling method is wet roller ball milling, ethanol is the ball milling medium, yttrium-stabilized zirconia balls are the grinding balls, and the ball milling mixing time is 8h; the dried mixed powder is uniformly mixed with 1% by mass PVA, And add an appropriate amount of alcohol to ultrasonically disperse to obtain a suspension with a concentration of 0.4g / ml;

[0032] Step 2: Evenly coat the suspension obtained in Step 1 on the surface of the alumina ceramic block to be connected, and press the alumina ceramic surface to make good c...

Embodiment 2

[0035] The present embodiment provides a high-temperature connecting agent for connecting alumina ceramics and a connecting method thereof, which specifically includes the following steps:

[0036] Step 1: Take Al with an average particle size of 0.1 μm and a chemical purity greater than 99.0% 2 O 3 Powder, TiO 2 Powder and Ta 2 O 5 Powder, according to the mass fraction of 97% Al 2 O 3 Powder, 3% TiO 2Powder ball milling and mixing; the ball milling method is wet roller ball milling, ethanol is the ball milling medium, yttrium-stabilized zirconia balls are the grinding balls, and the ball milling mixing time is 24h; the dried mixed powder is evenly mixed with 1% by mass PVA, And add an appropriate amount of alcohol to ultrasonically disperse to obtain a suspension with a concentration of 0.2g / ml;

[0037] Step 2: Evenly coat the suspension obtained in Step 1 on the surface of the alumina ceramic block to be connected, and press the alumina ceramic surface to make good ...

Embodiment 3

[0040] The present embodiment provides a high-temperature connecting agent for connecting alumina ceramics and a connecting method thereof, which specifically includes the following steps:

[0041] Step 1: Take Al with an average particle size of 0.1 μm and a chemical purity greater than 99.0% 2 O 3 Powder, TiO 2 Powder and Ta 2 O 5 Powder, according to the mass fraction of 97% Al 2 O 3 Powder, 3% TiO 2 Powder ball milling and mixing; the ball milling method is wet roller ball milling, ethanol is the ball milling medium, yttrium stabilized zirconia balls are the grinding balls, and the ball milling mixing time is 16h; the dried mixed powder is evenly mixed with 1% by mass PVA, And add an appropriate amount of alcohol to ultrasonically disperse to obtain a suspension with a concentration of 0.8g / ml;

[0042] Step 2: Evenly coat the suspension obtained in Step 1 on the surface of the alumina ceramic block to be connected, and press the alumina ceramic surface to make good...

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Abstract

The invention discloses a high-temperature connecting agent for connecting alumina ceramics. The raw material includes 1-10% Ta in terms of mass fraction 2 o 5 , 1~10% TiO 2 , 90%~98% Al 2 o 3 Powder, the sum of the mass fractions of each component is 100%. The invention also discloses a method for connecting alumina ceramics with the high-temperature bonding agent, including step 1: weighing Ta 2 o 5 、TiO 2 and Al 2 o 3 The powder is mixed by ball milling, dried, mixed with PVA, and added with alcohol for ultrasonic dispersion to obtain a suspension; Step 2: Apply the suspension evenly on the surface of the alumina ceramic block to be connected, and pressurize the surface to make good contact with the connecting agent; Step 3: Put the sample into an alumina crucible and place it in a muffle furnace, raise the temperature from room temperature to 1400°C~1650°C at 3°C / min~10°C / min, keep it warm for 0.5h~3h, and then heat it at 5°C / min The cooling rate of min~10°C / min is lowered to 1000°C, and well-connected alumina ceramics can be obtained after cooling. The connecting agent and connecting method of the present invention have high connection layer density, good connection matrix, high temperature resistance, corrosion resistance, The interface bonding strength is high.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and particularly relates to a high-temperature connecting agent for connecting alumina ceramics and a connecting method thereof. Background technique [0002] Alumina ceramics have the characteristics of high hardness, high mechanical strength, stable chemical properties, and excellent electrical insulation properties. It is one of the most widely used high-temperature structural ceramics in the industrial field. However, the inherent brittleness of alumina makes it difficult to obtain complex-shaped structural components by machining, which limits its engineering applications to some extent. Wet molding such as grouting is a common method for preparing large-sized or complex-shaped ceramic bodies, but such methods have low production efficiency, large firing shrinkage, and variability of specimens. Through appropriate and effective ceramic connection technology, complex-shaped ceramic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/00
CPCC04B37/005C04B2237/064C04B2237/343
Inventor 刘虎林刘长青薛云龙张新孟伍媛婷
Owner SHAANXI UNIV OF SCI & TECH
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