Ceramic metallization ointment, preparation method and application thereof

Abstract

The invention discloses a ceramic metallization ointment. The ointment is prepared from, by weight, 70-80 parts of molybdenum powder, 17-22 parts of manganese powder, 3-10 parts of well-calcinated low-temperature eutectic and 15-22 parts of an adhesive. The low-temperature eutectic is prepared from aluminum oxide, Suzhou clay, silicon dioxide, barium carbonate, calcium oxide, zirconium oxide and the like. A preparation method of the ointment comprises the steps of preparing the low-temperature eutectic, preparing the adhesive, preparing the ceramic metallization ointment and the like. On the basis of a traditional formula, barium carbonate is added, the formula is innovated, the metallization layer formula composition is enhanced, meanwhile, auxiliary materials are sintered, calcination preprocessing is performed according to phase diagrams at first, the preliminary eutectic is generated, diffusion transition of ceramic and the metallization layer is enhanced, the bonding strength of ceramic and the metallization layer is enhanced, the universality of the formula is enhanced, and the ointment can adapt to metallization welding of 95 aluminum oxide ceramic, 99 aluminum oxide ceramicand zirconium oxide ceramic at the same time.

Description

technical field [0001] The invention belongs to the technical field of application of ceramic metallization materials, and in particular relates to a ceramic metallization paste, a preparation method and an application thereof. Background technique [0002] Special ceramics are used more and more widely, such as 95 alumina ceramics for vacuum switch tube casings; 99 alumina ceramics for ignition devices in aerospace; zirconia ceramics for engine chambers, etc., but these ceramics Applications often need to be welded together with metals. In order to weld ceramics and metals together, a layer of metal coating needs to be coated on the surface of ceramics with ceramic metallization paste. At present, the most widely used is molybdenum-manganese metallization technology. [0003] Traditional molybdenum-manganese metallization is mainly composed of molybdenum, manganese, alumina, silica, zirconia, and calcium oxide. For the ceramic metallization paste and its preparation method...

AI Technical Summary

Problems solved by technology

This patented technology has problems such as long time period and complicated process when preparing metal paste

[0004] Another example: the application number is CN200610041036.X, which discloses a powder for ceramic metallization paste and its preparation method. The paste is composed of 60-80 parts of molybdenum powder and 20-40 parts of glass phase components, wherein: glass phase The components are composed of 25-40 parts of alumina, 0.5-2.5 parts of calcium oxide, 25-40 parts of silicon dioxide, 30-40 parts of manganese powder, 2-4 parts of titanium powder and 2-4 parts of zirconium dioxide. , when preparing the metallization paste, other sintering auxiliary materials such as molybdenum powder, manganese powder and silicon dioxide must be dry-milled for more than 90-100 hours respectively, and then passed through a 400-mesh sieve, and then several materials are dry-milled together , the material is passed through 400 sieves, and finally mixed with the binder ultrasonically to prepare the required paste. This method not only has the disadvantages of multiple ball milling, time-consuming, high metallization sintering temperature, and large energy consumption, but also has powder The material sticks to the wall and causes the ball mill to break, and because the powder is ultra-fine, it is quite difficult to pass through a 400-mesh sieve