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Metallized ceramic for microwave megnetron and it production method

A technology of metallized ceramics and production methods, applied in ceramics, fixed capacitor dielectrics, inorganic insulators, etc., can solve the problems of many pores in ceramic blanks, product quality differences, difficult to grasp time, etc., and achieve good air tightness and consistency. Good, fast precipitation effect

Inactive Publication Date: 2006-12-06
王伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ball milling of raw materials is basically manual operation and non-continuous production, which makes the powder particles coarse and poor in fluidity, which will lead to more pores and poor airtightness of the formed ceramic blank.
The pressing is a hot die-casting molding process, which makes the green body easy to deform, low yield and high production cost.
Since sintering is also manual operation and intermittent kiln firing, not only the production efficiency is extremely low, but also the time of each temperature zone is difficult to grasp, and the quality of the product will vary greatly due to the operator's mental and physical conditions; Nickel also relies on manual operation of the production line, using NISO4 electroplating solution, so that the precipitation speed is slow and the coating is not dense

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First select 88 parts by weight of aluminum oxide, 2.5 parts by weight of calcium carbonate, 2 parts by weight of silicon oxide, 4 parts by weight of kaolin, 1.5 parts by weight of talc, 7 parts by weight of a binder, 2 parts by weight of Formulation, dispersant of 2 weights, defoamer of 1 weight part, stand-by. The binding agent, release agent, dispersant and defoamer are respectively polyvinyl alcohol, stearate, sodium polyacrylate and polyester fiber.

[0029] After that, ball milling is performed. First pour aluminum oxide, calcium carbonate, silicon oxide, kaolin, talcum powder, binding agent, release agent, dispersant and defoamer into the ball mill, and add 85 parts by weight of deionized water, at 30 rpm The rotating speed of 1 minute is crushed into a paste slurry with an average particle size of less than 3 microns. The pasty slurry is then processed into a granular powder with an average particle size of 50 microns using a spray dryer.

[0030] After that,...

Embodiment 2

[0036] First select 92 parts by weight of aluminum oxide, 3 parts by weight of calcium carbonate, 1.5 parts by weight of silicon oxide, 3 parts by weight of kaolin, 2 parts by weight of talc, 9 parts by weight of a binder, 1.5 parts by weight of Formulation, the dispersant of 1 weight, the defoamer of 1.5 weight parts, stand-by. The binding agent, release agent, dispersant and defoamer are respectively polyvinyl alcohol, stearate, sodium polyacrylate and polyester fiber.

[0037] After that, ball milling is performed. First pour aluminum oxide, calcium carbonate, silicon oxide, kaolin, talcum powder, binder, release agent, dispersant and defoamer into the ball mill, and add 90 parts by weight of deionized water, at 35 rpm The rotating speed of 1 minute is crushed into a paste slurry with an average particle size of less than 3 microns. The pasty slurry is processed into a granular powder with an average particle size of 70 microns with a spray dryer.

[0038] After that, mo...

Embodiment 3

[0044] First select 96 parts by weight of aluminum oxide, 2 parts by weight of calcium carbonate, 1 part by weight of silicon oxide, 5 parts by weight of kaolin, 2.5 parts by weight of talc, 5 parts by weight of a binder, 1 part by weight of Formulation, the dispersant of 3 weights, the antifoaming agent of 2 weight parts, stand-by. The binding agent, release agent, dispersant and defoamer are respectively polyvinyl alcohol, stearate, sodium polyacrylate and polyester fiber.

[0045] After that, ball milling is performed. Pour Al2O3, calcium carbonate, silicon oxide, kaolin, talcum powder, binder, release agent, dispersant and defoamer into the ball mill, and add 95 parts by weight of deionized water at 40 rpm The rotating speed of 1 minute is crushed into a paste slurry with an average particle size of less than 3 microns. The pasty slurry is then processed into a granular powder with an average particle size of 80 microns with a spray dryer.

[0046] After that, molding tre...

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Abstract

The invention discloses a metallized ceramic for a microwave magnetron and a production method thereof. It is made of raw materials such as aluminum oxide, calcium carbonate, silicon oxide, kaolin, talcum powder, binder, release agent, dispersant and defoamer, after ball milling, molding, sintering, silk screen printing, metallization treatment and nickel plating. and other steps are made. The metallized ceramics for microwave magnetron has good quality, high yield and low production cost. The metallized ceramics for microwave magnetrons of the invention can be installed on the magnetrons of microwave ovens to generate microwaves or support ceramic tubes.

Description

(1) Technical field [0001] The invention relates to a metallized ceramic and a production method thereof. Specifically, it is a metallized ceramic used for generating microwaves or supporting a magnetron in a microwave oven and a production method thereof. (2) Background technology [0002] At present, the metallized ceramic tubes used in microwave magnetrons are mainly made of raw materials such as aluminum oxide, calcium carbonate, silicon oxide, kaolin and talcum powder, and there is no foaming agent in the raw materials. Foam will be generated during the ball milling process, resulting in uneven particle size distribution, irregular shape, poor fluidity, and low utilization rate (only 30-40%) of the produced granular powder. Not only the production efficiency is low, but the production cost is also high. [0003] Because its production method mainly includes the steps of raw material ball milling, pressing, sintering, metallization and nickel plating. The raw material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/632C04B35/622C04B37/02C04B41/88C25D3/12H01B3/12H01G4/12
Inventor 朱广汇
Owner 王伟