JPS58161978A - Method of bonding ceramic member and metal member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention provides a ceramic member and a metal member that have improved applicability of a metallizing paste to the ceramic member and improved adhesion between the ceramic member and the metallized surface. Regarding the joining method.

[Technical background of the invention and its problems 1 Conventionally, sealed parts formed by brazing a metal member to a ceramic member have excellent airtightness, heat resistance, hot insulation, voltage resistance, etc. Therefore, it is widely used as electronic components such as silicon rectifier envelopes and microwave diode cases.

Such parts are manufactured by coating a ceramic member with a metallizing paste mainly composed of fine powder of a high-melting metal such as molybdenum, heating and sintering it in a reducing atmosphere at about 1500°C, and then metallizing it with nickel. plating treatment,
Manufactured by brazing to metal parts using silver solder.

As a metallizing paste, a paste prepared by adding and mixing compounds such as manganese and silicon to molybdenum powder and forming it into a paste with an organic binder is often used.

However, this product has the disadvantage that it tends to drip during application, causing it to protrude from the applied surface.

To prevent such protrusion from the coated surface, 11
Although it is possible to reduce the amount of organic binder and increase the ratio of powder components, there is a drawback that reducing the amount of organic binder reduces spreadability and makes coating difficult.

In addition, such metallizing pastes are not sufficiently compatible with nickel plating, so if nickel plating is applied on top of this, the nickel plating layer may bulge or the required thickness of the nickel plating layer may not be obtained. There was a problem in that when the silver wax ran out, it invaded the metallized layer and caused leakage.

[Object of the Invention] The present invention improves the applicability of a metallizing paste to a ceramic member to improve the adhesion between the ceramic member and the metallized layer, and also improves the compatibility between the ceramic member and the metal with nickel metal. The purpose is to provide a method for joining members.

[Summary of the Invention] The present invention involves adding manganese oxide, force-baked talc, and optionally chikdan dioxide to molybdenum powder, and applying and baking a metallizing paste made into a paste with an organic binder onto a ceramic member. This baking is characterized by applying metal plating to the surface and then brazing the metal member to this metal surface.

The force-baked talc in the present invention is prepared by adding 10% of the talc in advance.
It is obtained by heating to 00 to 1100°C to remove crystal water, and particles with a particle size of 0.5 μm or less are suitable. In the present invention, this force-baked talc has the effect of thickening the metallizing paste and improving the chikunto. The amount of this force-baked talc added is 10 molybdenum powder.
3 to 10 parts by weight is suitable for 0 parts by weight. If it is less than this value, no effect will be obtained, and if it exceeds this value, the adhesion between the ceramic member and the metallized surface will deteriorate.

In the present invention, when adding 5 parts by weight or more of force-calcined talc, 1 to 5 parts by weight of titanium dioxide should be added to the molybdenum powder to prevent a decrease in the adhesion between the ceramic member and the metallized surface. is desirable. Note that this titanium dioxide has the effect of promoting sintering in addition to increasing adhesion strength.

Manganese oxides in the present invention include manganese dioxide and -manganese oxide, both of which can be used.

This manganese oxide additive 7301 is molybdenum powder 1
Generally, 1 to 5 parts by weight per 00 parts by weight is appropriate.

[Embodiments of the invention] Next, examples of the present invention will be described.

Example: 5 parts by weight of ethyl cellulose was mixed with 251 parts by weight of benzyl alcohol.
100 parts by weight of molybdenum powder dissolved in 1 part vehicle, 11 parts manganese dioxide! Quantity part, force-baked talc 10 vertical teeth part, titanium dioxide 3f! When a certain amount of the mixed powder was added and mixed to form a paste, and the paste was applied to the end face of a cylindrical ceramic member having an outer diameter of 16 mm and an inner diameter of 12 nm, no sag occurred at all. The ceramic member coated with this paste was heated to 1500° C. in a hydrogen stream, and then nickel plating was performed on the paste coated surface by a conventional method. Even when the nickel plated surface was heated to 1000°C, no blistering was observed on the nickel plated surface.

A molybdenum plate was soldered to the nickel-plated surface of the model using silver solder, and the peel strength between the ceramic member and the molybdenum plate was measured. The peel strength between the ceramic member and the metallized layer was 2.5 kg/- (average value).

On the other hand, a ceramic member in which a metallizing paste containing talc containing water of crystallization without heat treatment was applied instead of force-baked talc was applied to the end face of the ceramic member at 1500°C.
When nickel plating was applied to the paste-applied surface in the same manner, slight blistering of the nickel plating was observed on 2 out of 30 pieces. Furthermore, a molybdenum plate was silver-brazed to the ceramic member thus obtained, and the peel strength between the ceramic member and the metallized layer was measured.1.
8 kg/c ((average value).Furthermore, when a similar experiment was conducted using a metallizing paste made of 100 parts by weight of molybdenum powder and 7 parts by weight of manganese oxide, the paste dripped. Significant nickel plating occurred, and slight blistering was observed in all 30 plated layers.Also, the peel strength between the ceramic member and the metallized layer was 1.1 kg/m2 (average value). there were.

[Effect of the invention 1] As is clear from the above examples, according to the method of the present invention, the metallizing paste applied to the zeramic member does not drip, and is compatible with nickel plating. It also has excellent adhesion between the ceramic member and the metallized layer.

(7317) Representative patent attorney Kensuke Norichika (and 1 other person) 385-

Claims (2)

[Claims] (1) Manganese oxidation, force-baked talc, and titanium dioxide as necessary are added to molybdenum powder, and the metallizing paste, which is made into a paste with an organic binder, is baked onto a ceramic member. A method for joining a ceramic member and a metal member, which comprises applying metal plating to the surface and then brazing the metal member to the metal surface. (2) The method of joining a ceramic member and a metal member according to claim 1, wherein the amount of force-calcined talc is 3 to 10 parts by weight per 100 parts by weight of molybdenum powder.