Sintering method for precious metal layer on surface of ceramic or glass

Abstract

The invention discloses a sintering method for a precious metal layer on the surface of ceramic or glass. The sintering method adopts three slurries, i.e., a bottom slurry, a body slurry and a surfaceslurry. The sintering method comprises the following steps: coating the bottom slurry onto the surface of the ceramic or the glass, carrying out drying in the air, and carrying out sintering; then coating the body slurry, carrying out drying in the air, and carrying out sintering; and coating the surface slurry, carrying out drying in the air, and carrying out sintering so as to form the preciousmetal layer on the surface of the ceramic or the glass, wherein the bottom slurry comprises the following components in parts by weight: 50 to 70 parts of precious metal powder, 3 to 5 parts of glasspowder, 1 to 5 parts of borax, 1 to 5 parts of a wetting agent, 10 to 20 parts of polyethylene glycol and 15 to 20 parts of water; the body slurry comprises the following components in parts by weight: 70 to 80 parts of precious metal powder, 1 to 3 parts of glass powder, 1 to 5 parts of a wetting agent, 5 to 10 parts of polyethylene glycol and 15 to 20 parts of water; and the surface slurry comprises the following components in parts by weight: 80 to 90 parts of precious metal powder, 0.5 to 1.5 parts of glass powder, 1 to 5 parts of a wetting agent, 5 to 10 parts of polyethylene glycol and2 to 20 parts of water. The method provided by the invention can firmly attach the precious metal layer onto porcelain, has controllable and uniform thickness, and is friendly to the environment.

Description

technical field [0001] The invention relates to the technical field of surface processing of ceramics or glassware, in particular to a method for sintering a precious metal layer on the surface of ceramics or glass. Background technique [0002] Ceramic or glassware is one of the most widely used utensils in people's daily life. With the improvement of living materials and cultural level, the requirements for the ornamental and functional requirements of this kind of utensils are getting higher and higher. Traditional ceramics, Glass products can no longer meet people's needs. [0003] Gold and silver are precious metals that people love. They are very decorative, such as making silver ornaments, etc.; at the same time, silver also has bactericidal properties, such as making silver bowls and other tableware, so as to play the role of disinfection, sterilization and preservation . However, sterling silver tableware uses a large amount of silver and the cost is relatively hi...

AI Technical Summary

Problems solved by technology

There is another silver paste method. In this method, silver powder is dispersed into an organic solvent to make a silver paste, which is coated on the surface of the ceramic and then sintered to make the silver adhere. In this process, a large amount of organic solvent is used. There will be a large amount of VOC, which will cause harmful effects on the environment and people's health. At the same time, the thickness of the fired silver film is relatively thin