High-temperature resistant lead-less glass powder for glass fiber net printing ink, preparation and application thereof

Abstract

The invention relates to lead-free glass powder used in refractory glass screen printing ink, the preparation and the application thereof. The components of the glass powder by weight percentage are: 30-50 percent of Bi2O3, 10-50 percent of B2O3, 0-30 percent of ZnO, 0-10 percent of Al 2O3, 0-10 percent of SiO2, 0-10 percent of MgO, 0-6 percent of K2O, 0-6 percent of Na2O and 0-6 percent of Li2O; the preparation is that : each material is weighed and taken according to the weight percentage of each component, and then well mixed, put into a quartz crucible, and put into an electric furnace, and the temperature is preserved. The glass melt is poured into a bead machine to be pressed into thin slices, or poured into cold water, dried, ball ground, screened by a 300 mesh sieve, and finally preserved in dry condition. The glass powder is applied in the printing, the base plate of which is float glass, and can be sealed with glass, ceramic and metal which are at the same temperature and have the same expansion coefficient.

Description

technical field [0001] The invention belongs to the field of lead-free glass powder, in particular to lead-free glass powder for high-temperature-resistant glass screen printing ink. Background technique [0002] The vigorous development of screen printing has led to the rapid development of various new screen printing inks, such as scented inks, fluorescent inks, foaming inks, and fast-curing inks. These inks are generally dried at room temperature. Glass printing and ceramic printing are dried at high temperature. Therefore, high temperature resistant inks often refer to inks for glass and ceramic printing. According to different printing materials and different printing processes, the heat-resistant temperature required by high-temperature-resistant inks is also different. [0003] There are two kinds of inks for screen printing on inorganic glass. One is that after the inorganic pigment is ground to a certain fineness, then adding acrylic ester, the screen printing is ...

AI Technical Summary

Problems solved by technology

[0009] Asahi Glass Special Fair 7-25568 proposes PbO-SiO that can be used in the dielectric layer of ion display (PDP) and fluorescent display (VFD) 2 It is a glass frit paste, and its glass composition contains: PbO, SiO 2 、Al 2 o 3 , SnO 2 、TiO 2 , CaO, BaO, CeO 2 , La 2 o 3 , B 2 o 3 , ZnO, SrO, MgO, the expansion coefficient is 80~90×10 -7 Near / ℃, the expansion coefficient is reduced by adding fillers, and the densification of the dielectric layer is realized through the optimization of the composition of the lead glass and the proper proportion of the fillers. However, the biggest disadvantage is that it contains a large amount of lead oxide (>50wt %), can not meet the current demand for lead-free

[0010] The mole percentage of the glass composition disclosed in Japanese Patent No. H7-69672 is: P 2 o 5 25~50%, SnO 30~70%, ZnO 0~25%, on this basis, add B 2 o 3 、WO 3 , Li 2 O, etc., the transition temperature of the glass is 350-450°C, and the coefficient of thermal expansion is greater than 120×10 -7 / °C, the method of using fillers in the patent reduces the expansion coefficient of the glass, but affects the fluidity and airtightness of the glass during sealing, and its chemical stability is not high

[0011] DuPont USP: 5378408 proposes lead-free Bi 2 o 3 -B 2 o 3 -SiO 2 System low-melting point glass, its weight percent composition is: 65-95% Bi 2 o 3 , 0.1~9%B 2 o 3 , 2 ~ 15% SiO 2 , 0~5%Al 2 o 3 , 0~5% CaO, 0~20% ZnO, T f =400~650℃, the expansion coefficient can also reach 80×10 -7 / °C or less, but due to Bi 2 o 3 The content is higher, so the cost is higher, and there is no advantage in price