A low-temperature and environmentally friendly black glass paste with high optical density

Abstract

The invention discloses a low-temperature environment-friendly black glass paste with high optical density. The glass paste comprises raw materials in the following weight ratio: 40-75% cullet, 15-45% black pigment, 12-25% varnish Oil, the cullet comprises raw materials in the following weight ratio: 17-37% SiO 2 , 20-60% Bi 2 o 3 , 4-20% ZnO, 4-19% B 2 o 3 , 1~12%Na 2 O, 0~5%K 2 O, 1~4%TiO 2 , 0.5-6% ZrO 2 . The glass paste prepared by the present invention does not contain Pb, Cr and halogen elements, is environmentally friendly, and conforms to the EU RoHS environmental protection standard. The raw materials of the raw materials are processed by heat treatment and dry grinding process, which greatly improves the optical density of the glass paste. After tempering at 640-680°C, the gloss of the glaze is good, with extremely high blackness and excellent acid and alkali resistance.

Description

technical field [0001] The invention relates to a low-temperature environment-friendly black glass paste with high optical density, which belongs to the technical field of glass paste. Background technique [0002] Glass paste is a kind of glaze that is printed on glass through a medium such as a screen or a roller, and then can be firmly bonded to the glass after tempering. After different glass pastes are bonded to the glass, due to their different properties such as color, glaze texture and hiding power, they have different properties such as decoration, light shielding, and protection, so they are widely used in construction, home appliances, kitchen and bathroom, and automobiles. There are very wide applications. [0003] After the glass paste is tempered, the hiding power of the glass paste is significantly reduced, which sometimes seriously affects the use and development of the tempered glass paste. The hiding power of glass paste can be expressed by optical densit...

AI Technical Summary

Problems solved by technology

Although the hiding power of the glass paste has been improved, the temperature of the glass paste is relatively high and the blackness is poor, which restricts the use and development of the glass paste

Therefore, there is an urgent need for a low-temperature environment-friendly black glass paste with high optical density and a preparation method thereof, to solve the problem of generally poor hiding power of glass paste, and to take into account other necessary properties at the same time

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