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Mixed filling powder for hot filament assembly and preparation method of mixed filling powder

A technology of mixed filling and hot wire components, which is applied in the direction of heating element materials, cathode heater manufacturing, electric heating devices, etc., can solve the problem of insufficient quick start of the cathode, achieve improved cathode start time, reduce start time, and increase thermal radiation coefficient Effect

Active Publication Date: 2021-03-12
CHENGDU GUOGUANG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] From this point of view, at present, our conventional hot wire components mainly use alumina as filler powder, although it can basically meet the requirements of current electric vacuum devices, but in There are still some deficiencies in the rapid heating of the hot wire assembly and thus the rapid start of the cathode

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A mixed filler powder for a hot wire assembly, the filler powder comprising the following components in parts by weight: 105 parts of alumina powder, 19 parts of yttrium oxide powder and 31.5 parts of tungsten oxide powder.

[0025] The above-mentioned aluminum oxide powder, yttrium oxide powder and tungsten oxide powder all have a particle diameter of 3-5 μm and a purity of 99.99%.

[0026] The above hot wire assembly is prepared by mixing filler powder through the following steps:

[0027] 1) Powder preparation: After mixing alumina and yttrium oxide in proportion, ball milling to obtain a uniform slurry, set aside;

[0028] 2) High-temperature sintering: Sinter the powder described in step 1) at 1860±20°C for 2 minutes at a high temperature, then sieve, collect the sieved powder, and set aside;

[0029] 3) Mixed tungsten oxide: Mix the sieved powder collected in step 2) with tungsten oxide at a mass ratio of 8:2 to obtain the product.

Embodiment 2

[0031] A mixed filler powder for a hot wire assembly, the filler powder comprising the following components in parts by weight: 95 parts of alumina powder, 21 parts of yttrium oxide powder and 28.5 parts of tungsten oxide powder.

[0032] The above-mentioned aluminum oxide powder, yttrium oxide powder and tungsten oxide powder all have a particle diameter of 3-5 μm and a purity of 99.99%.

[0033] The above hot wire assembly is prepared by mixing filler powder through the following steps:

[0034] 1) Powder preparation: After mixing alumina and yttrium oxide in proportion, ball milling to obtain a uniform slurry, set aside;

[0035] 2) High-temperature sintering: Sinter the powder described in step 1) at 1900°C for 2 minutes at a high temperature, then sieve, collect the sieved powder, and set aside;

[0036] 3) Mixed tungsten oxide: Mix the sieved powder collected in step 2) with tungsten oxide at a mass ratio of 8:2 to obtain the product.

Embodiment 3

[0038] A mixed filler powder for a hot wire assembly, the filler powder comprising the following components in parts by weight: 98 parts of alumina powder, 20 parts of yttrium oxide powder and 29 parts of tungsten oxide powder.

[0039] The above-mentioned aluminum oxide powder, yttrium oxide powder and tungsten oxide powder all have a particle diameter of 3-5 μm and a purity of 99.99%.

[0040] The above hot wire assembly is prepared by mixing filler powder through the following steps:

[0041] 1) Powder preparation: After mixing alumina and yttrium oxide in proportion, ball milling to obtain a uniform slurry, set aside;

[0042] 2) High-temperature sintering: Sinter the powder described in step 1) at 1860±20°C for 2 minutes at a high temperature, then sieve, collect the sieved powder, and set aside;

[0043] 3) Mixed tungsten oxide: Mix the sieved powder collected in step 2) with tungsten oxide at a mass ratio of 8:2 to obtain the product.

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Abstract

The invention discloses mixed filling powder for a hot filament assembly and a preparation method of the mixed filling powder, and the filling powder can realize rapid heat transfer of the hot filament assembly so as to realize rapid starting of a cathode. The filling powder comprises the following components in parts by weight: 95-105 parts of aluminum oxide powder, 19-21 parts of yttrium oxide powder and 28.5-31.5 parts of tungsten oxide powder.

Description

technical field [0001] The invention relates to the field of hot wire components, in particular to a mixed filling powder for a hot wire component and a preparation method thereof. Background technique [0002] At present, foreign technologies on fast-heating cathode thermal subassemblies have matured. Russia is the representative, and the best known result of the fast-heating cathode thermal subassemblies (cathode diameter is Φ3.0mm) developed by them is fast start-up time. Less than 5 seconds, and meet the relevant vibration test requirements. In addition to Russia, TMD has also been committed to the development of high-reliability and long-life fast-heating cathode thermal sub-assemblies. TMD can achieve a cathode within 3 seconds. [0003] my country is still in its infancy in terms of fast-heating cathode thermal sub-assemblies, and the technology is not very mature. At present, the fast-starting cathode thermal sub-assembly (cathode diameter of Φ3.2mm) developed by Na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J1/144H01J1/22H01J9/08H05B3/14
CPCH01J1/144H01J1/22H01J9/08H05B3/141
Inventor 陈道全刘冬梅
Owner CHENGDU GUOGUANG ELECTRIC
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