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A method of preparing a ceramic joint with temperature detection function using rare earth doped oxide glass

A technology of oxide glass and rare earth doping, applied in the field of ceramic joints, can solve the problems of large residual stress and difficult temperature monitoring of ceramic joints, so as to ensure technical stability, realize reliable connection, enhance service monitorability and safety Effect

Active Publication Date: 2022-01-25
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the current ceramic joint has a large residual stress and the temperature is difficult to monitor, and provides a method based on rare earth doped glass material to enhance the performance of the ceramic joint and realize the joint temperature detection method

Method used

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  • A method of preparing a ceramic joint with temperature detection function using rare earth doped oxide glass
  • A method of preparing a ceramic joint with temperature detection function using rare earth doped oxide glass
  • A method of preparing a ceramic joint with temperature detection function using rare earth doped oxide glass

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specific Embodiment approach 1

[0025] Specific Embodiment 1: A method of using rare earth-doped oxide glass to prepare a ceramic joint with temperature detection function in this embodiment is carried out according to the following steps:

[0026] 1. Preparation of Rare Earth Doped Oxide Materials

[0027] 1) Weigh the rare earth chloride and matrix material chloride according to the stoichiometric ratio, dissolve in water and stir at room temperature, adjust the pH value of the solution to 10-13 with 2-5mol / L sodium hydroxide to obtain a white turbid solution ;

[0028] 2) Move the above-mentioned white turbid solution to a hydrothermal reaction kettle, wherein the volume filling degree of the reaction kettle is 70%, and then place the reaction kettle in a constant temperature box, and react at a constant temperature of 190-220°C for 7-10 hours; after the reaction is completed, , take out the sample in the reaction kettle, centrifuge at a speed of 8000-12000r / min, wash the precipitate three times with dei...

specific Embodiment approach 2

[0036] Embodiment 2: This embodiment is different from Embodiment 1 in that: the ceramic substrate is an oxide ceramic. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0037] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the oxide ceramic is Al 2 o 3 or ZrO 2 . Others are the same as in the first embodiment.

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Abstract

The invention discloses a method for preparing a ceramic joint with temperature detection function by using rare earth doped oxide glass, which relates to the field of joints. The invention aims to solve the problem that the existing joint area is narrow and the temperature is difficult to monitor. The method of the invention: the rare earth doped oxide material is prepared by a hydrothermal method, and then mixed with the oxide glass powder and placed between the ceramic materials to be welded as a composite intermediate layer to form a workpiece to be welded, and the welding can be completed in the air. The present invention imparts optical properties to the glass through the rare earth-doped oxide material, utilizes the easy adjustment of the thermal expansion coefficient of the glass and the temperature-dependent characteristics of the thermal coupling energy level of the rare earth ion, effectively relieves the joint stress and endows the joint with temperature sensing characteristics, thereby improving the strength of the joint And realize joint temperature monitoring. The strength of the joint is as high as 50-110Mpa, and the temperature detection sensitivity can be as high as 0.01-0.02K ‑1 . The invention is applied in the fields of aerospace, electronic device, automobile and nuclear industry and the like.

Description

technical field [0001] The invention relates to the joint field, in particular to a method for preparing a ceramic joint with temperature detection function by using rare earth doped oxide glass. Background technique [0002] Ceramic materials are widely used in aerospace, electronic devices, automobiles and nuclear industries due to their high mechanical strength, good thermal stability, corrosion resistance and wear resistance. However, ceramics are highly brittle and difficult to process into complex and large components, which limits their application in industry to a certain extent. Reliable connection between ceramics and real-time measurement of joint temperature can effectively monitor joint failure process and avoid safety accidents. At present, the active brazing technology is mostly used in the industry to connect ceramics, and active elements are added to the solder to promote its wetting and spreading on the ceramic surface, and then the connection is realized....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/00G01K11/00C03C14/00C03C8/24C03C4/12C03C1/02
CPCC04B37/003G01K11/006C03C14/006C03C8/24C03C4/0071C03C1/02C04B2237/343C04B2237/10
Inventor 邢丽丽杨卫岐敖润刘易姝马显锋
Owner SUN YAT SEN UNIV
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