SU1625855A1 - Frit for metal plating paste - Google Patents

Abstract

The invention relates to compositions of frits used in pastes for the metallization of alumina ceramics, and can be applied in the electronic, electrical industry and precision instrument making in the manufacture of vacuum-tight metal-ceramic junctions. The purpose of the invention is to increase the mechanical stability and heat resistance of junctions with alimo oxide by ceramics: n, containing glass metal, with a metal in the high-temperature folder of Rritt. Metallization of ceramics is carried out using Mo-based paste containing 30 wt.% Fritt. Moreover, the frntga contains SiO, Lа, 0, Л1N, and V with a crii of a relative ratio of comms, mts .: La203 2J-40: A1N L-.0; Y2u 3 10-20, Si02 the rest. Vzngakn pasta at 1350-1450 ° C l of the forming medium for 1 hour. The application of the proposed frit made it possible to obtain p.cum-dense junctions when soldering ceramics with high-temperature metal. The mechanical strength of the solder VK 94-1 with nickel solder in shear is 150-160 MP. Mechanical strength gpaee increases in 35-45%, 1 table. 9 (L

Description

The invention contributes to the composition of frits used in pastes for the metallization of alumina ceramics, and can be applied in the electronic, electrical industry and precision instrumentation of the manufacture of vacuum-tight metal-ceramic cements.

The purpose of the invention is to increase the mechanical strength and heat resistance of the junctions of metallized alumina ceramics containing a glass phase with a metal when brazing with high-temperature solders.

The proposed frit for the metallization paste contains Si02, L03,

 A1N and Y, 03 with the following content of components, wt.%:

 ъ

A1N

Y203 SiO

20-40 13-30

Rest

e &

Hche

ate

00

1 ate

The technology for preparing frit and metal earthing paste consists of the following.

Foitta components are melted under nitrogen at 1600–1650 ° С for 1 h, followed by rapid cooling. The synthesized frit is crushed to a specific surface of 35 ° С – 4000 cm2 / g. To prepare the metallization composition, Frit is mixed with molybdenum.

(specific surface 4000 cm-2 / r) at the rate of, wt.%: Mo 70%; frit 30. Metallization paste is prepared at the rate of 100 g of mixture per 30 ml of a 2.5% nitrocellulose solution in isoamyl acetate. The resulting mixture is applied to the surface of the ceramic VK-94-1 with a layer thickness of 40-60 microns. The burning of the coating is carried out in the form of a gas (water - type) at 1350- 450 ° C for 1 hour. Heating and cooling are carried out at a rate of 20 ° C / min. After the metalized coating is burned onto the surface of a vacuum-dense junction of alumina ceramics containing a glass phase with metal.

The mechanical strength of the junctions increases by 35-45%, which increases their reliability and increases the service life of metal-ceramic assemblies under thermomechanical conditions.

Claims (1)

Invention Formula Frit for molybdenum-based metallization paste, including SiO2, ceramics are soldered with kera-15 and A1N, which differs from and vacuum-tight junctions of alumina ceramics containing a glass phase with metal. The mechanical strength of the junctions increases by 35-45%, which increases their reliability and increases the service life of metal-ceramic assemblies under thermomechanical conditions. Invention Formula Frit for molybdenum-based metallization paste, including SiO2,