Unlock instant, AI-driven research and patent intelligence for your innovation.

A coating molybdenum heating element that can be used in the atmosphere and its preparation method

A heating element and coating technology, which is applied in the direction of coating, metal material coating process, furnace heating element, etc., can solve the problem that the molybdenum heating element cannot be used, and achieve the effects of low cost, easy industrial production, and simple preparation process

Active Publication Date: 2017-09-29
XIAMEN UNIV OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantage that conventional molybdenum heating elements cannot be used in high-temperature atmospheres, the invention provides a coated molybdenum heating element that can be used in high-temperature atmospheres and a preparation method thereof, which is simple in preparation, low in cost, and easy for industrial production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A coating molybdenum heating element that can be used in the atmosphere and its preparation method
  • A coating molybdenum heating element that can be used in the atmosphere and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation process of a coated molybdenum heating element that can be used in high-temperature atmospheres is as follows: figure 1 shown.

[0031] (1) Use potassium-doped molybdenum with a potassium content greater than 250ppm as the matrix, and press figure 2 Specifications (the entire heating element including heating part, cold end part and aluminum spraying part) is processed, put it into the electrolyte solution with a ratio of 10vol.% hydrofluoric acid + 20vol.% nitric acid + the remaining distilled water, the electrolytic voltage It is 10V, and the electrolysis time is 30s, and then the electrolyzed heating element substrate is ultrasonically cleaned for 5 minutes, and dried for later use.

[0032] (2) Use 20wt.% silicon + 10wt.% tungsten + the rest of alumina as the reaction penetration agent, and put the heating element substrate that has been dried and prepared into the crucible that has been equipped with the reaction penetration agent to ensure that the...

Embodiment 2

[0036] A preparation process of a coated molybdenum heating element that can be used in high-temperature atmospheres is as follows: figure 1 shown.

[0037] (1) Potassium-doped molybdenum with a potassium content of 200-250ppm is selected as the matrix, and after processing according to the specifications, it is put into electrolysis with a ratio of 10vol.% hydrofluoric acid + 20vol.% nitric acid + the remainder of distilled water In the liquid, the electrolysis voltage is 10V, and the electrolysis time is 30s. Then, the electrolyzed heating element substrate is ultrasonically cleaned for 5 minutes, and dried for later use.

[0038] (2) Use 20wt.% silicon + 5wt.% chromium + 5wt.% boron + the rest of alumina as the reaction penetration agent, and put the dried and spare heating element substrate into the crucible already equipped with the reaction penetration agent to ensure heat generation The body matrix is ​​in full contact with the reaction penetration agent, and the cruci...

Embodiment 3

[0042] A preparation process of a coated molybdenum heating element that can be used in high-temperature atmospheres is as follows: figure 1 shown.

[0043] (1) Potassium-doped molybdenum with a potassium content of 150-200ppm is selected as the matrix, and after processing according to the specifications, it is put into electrolysis with a ratio of 10vol.% hydrofluoric acid + 20vol.% nitric acid + the remainder of distilled water In the solution, the electrolysis voltage is 10V, and the electrolysis time is 30s. Afterwards, the electrolyzed heating element substrate is ultrasonically cleaned for 5 minutes, and dried for later use.

[0044] (2) Using 20wt.% silicon + 10wt.% aluminum + the rest of alumina as the reaction penetration agent, put the heating element substrate that has been dried and prepared into the crucible that has been equipped with the reaction penetration agent to ensure that the heating element substrate and the reaction penetration agent The crucible was ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a molybdenum-coated heating element that can be used in the atmosphere and a preparation method thereof. Potassium-doped molybdenum is selected as the base material of the heating element, and processed according to size and shape requirements, and then the base of the heating element is surface polished, Pretreatment, and finally perform element diffusion reaction on the surface of the heating element substrate to prepare a coated molybdenum heating element. The preparation process is: potassium / lanthanum molybdenum substrate → substrate processing → polishing, pretreatment → high temperature diffusion reaction → coating molybdenum heating body. The prepared coated molybdenum heating element solves the problem that the molybdenum heating element cannot be used in an aerobic environment, has simple preparation process, low cost, and is easy for industrial production.

Description

technical field [0001] The invention relates to a coated molybdenum heating element and a preparation method thereof, in particular to a preparation technology capable of realizing the use of metal molybdenum in a high-temperature atmospheric environment. Background technique [0002] Metal molybdenum and its alloys have a high melting point (2610°C), good thermal conductivity and low expansion coefficient, and can still maintain high strength at high temperatures, so they are ideal materials for high-temperature heating elements. At present, metal molybdenum and its alloys are often used to manufacture heating elements of high-temperature furnaces. In the production of tungsten, molybdenum and cemented carbide, molybdenum wires are mostly used as heating elements in reduction furnaces and sintering furnaces, and molybdenum rods are used to generate heat for some iron products. body. The operating temperature of the hydrogen reduction furnace using molybdenum wire or molybd...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/52C23C12/02H05B3/64
Inventor 张厚安古思勇廉冀琼吴艺辉
Owner XIAMEN UNIV OF TECH