Second metallizing method for ceramics

A secondary metallization and ceramic technology, applied in the field of ceramic secondary metallization, can solve the problems of low pass rate, low nickel utilization rate, high cost, etc., to meet the requirements of mass production, excellent sealing effect, tensile strength Intensity ideal effect

Inactive Publication Date: 2008-07-23
CHANGSHU CITY YINYANG CERAMIC CO LTD
View PDF1 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: one, due to the nickel plating by the electroplating method, the thickness of the nickel layer is only a very thin 2-4um, so it is very easy to peel, foam, have many defects, and the pass rate is low when burning hydrogen. The cost is high, and if it is directly sealed (brazed) with metals such as Kovar alloy without sintering, it will cause poor welding, air leakage, and affect the product quality of the microwave oven magnetron; secondly, due to the use of electroplating Nickel plating, therefore serious environmental pollution, and the plating solution is detrimental to the health of employees; third, the thin nickel plating layer of 2-4um is difficult to guarantee the sealing strength wi

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1:

[0030] A). Prepare nickel paste for secondary metallization, weigh 0.75 parts of coarse nickel powder with particle size D50=3~6um and 0.25 part of fine nickel powder with particle size D50=1.0~3um by weight, and weigh from terpineol 0.3 part and 0.25 part of the binder prepared by mixing with 0.01 part of ethyl cellulose, and then put the weighed coarse and fine nickel powder and the binder into the ball mill tank pre-installed with agate balls , Where: the weight ratio of the agate ball to the nickel powder (coarse and fine nickel powder) is 1:1, the diameter of the agate ball is 5-10mm, the ball milling jar is sealed and placed on the ball mill for ball milling, and the frequency of the ball mill is controlled to 30Hz, After ball milling for 20 hours, separate the agate balls with a filter to obtain a nickel paste for printing;

[0031] B). For printing nickel paste, the screen printing method is adopted, specifically: using a preferred but not limited model...

Example Embodiment

[0034] Example 2:

[0035] A). Prepare secondary metallized nickel paste, weigh 0.5 parts of coarse nickel powder with particle size D50=3~6um and 0.5 part of fine nickel-nickel powder with particle size D50=1.0~3um by weight, weigh from 0.20 part loose 0.35 parts of binder prepared from oleyl alcohol and 0.01 part of ethyl fiber, and then the weighed coarse and fine nickel powder and binder are put into a ball mill tank equipped with agate balls, in which: agate balls and The weight ratio of nickel powder (coarse and fine nickel powder) is 1:1, and the diameter of the agate ball is 3-8mm. The ball milling jar is sealed and placed on the ball mill for ball milling. The frequency of the ball mill is controlled to 35 Hz, and the ball milling is used for 16 hours. The agate is separated to obtain a nickel paste for printing;

[0036] B). When printing nickel paste, only adjust the distance between the film screen and the ceramic substrate to 25±2um, and the rest are the same as the d...

Example Embodiment

[0040] Example 3:

[0041] A). Prepare secondary metallized nickel paste, weigh 0.85 parts of coarse nickel powder with particle size D50=3~6um and 0.15 part of fine nickel powder with particle size D50=1.0~3um according to weight parts, weigh from 0.12 parts loose 0.3 parts of binder prepared from oleyl alcohol and 0.01 parts of ethyl cellulose, the frequency of the ball mill is 20 Hz, and the time of the ball mill is 25 h. The rest are the same as the description of step A) in Example 1 or 2;

[0042] B). When printing nickel paste, only adjust the distance between the film screen and the ceramic substrate to 18±2um, and the rest are the same as the description of step B) in Example 1;

[0043] C). For drying and sintering, only the drying temperature and drying time are changed to 115℃ and 15min respectively, and the sintering temperature and holding time are changed to 1000℃ and 20min respectively, and the thickness of the inherent nickel layer is 5-6um. The finished secondary...

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

PropertyMeasurementUnit
Graininessaaaaaaaaaa
Graininessaaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a second metallized ceramic method, belonging to the technical field of ceramic metallization, which comprises the following steps: preparing nickel paste of second metallization, printing the nickel paste and then drying and sintering. The powdered nickel and the caking agent are weighted according to weight account and then put into a ball mill tank with agate ball. The ball mill tank is on the globe mill. Then the mixed material is ball milled by controlling the frequency and milling time of the globe mill, and then the nickel paste can be obtained after separating the agate ball after ball milling. The nickel paste is printed on the molybdenum-manganese layer surface of a ceramic base which is metallized sintered once by controlling the printing thickness and the ceramic base coated by nickel paste can be obtained. The ceramic base coated by nickel paste is dried first and then put into a container to sinter, finally, the second metallized ceramic product coated by nickel paste can be obtained. The second metallized ceramic method has the advantages of ensuring the pass percent, controlling the cost and meeting the producing requirements of mass production, and thus can benefit the environment and employee and the ceramic base second metallized has the advantages of good sealing-in result and strong tensile strength.

Description

technical field [0001] The invention relates to a method for secondary metallization of ceramics, which is used to coat at least one end face of a ceramic substrate as a cathode and anode assembly of a microwave oven magnetron that has completed primary metallization, so that the ceramic substrate after nickel coating is more effective. The invention relates to sealing ground and metal such as kovar alloy, and belongs to the technical field of ceramic metallization processing. Background technique [0002] Compared with the processing of metallized ceramic devices used as microwave oven magnetrons, such as discharge tubes, vacuum switch tubes, electronic devices, detection sensors, etc., it is difficult both in terms of technical quality requirements and cost control requirements. It is much larger. Therefore, up to now, although there are a handful of manufacturers involved in the production of metallized ceramic devices for microwave oven magnetrons in my country, there has...

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
IPC IPC(8): C04B41/88
Inventor 高永泉翟文斌姚明亮
Owner CHANGSHU CITY YINYANG CERAMIC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap