Unleaded glass powder used for electronic paste and preparation method thereof

Abstract

The invention provides an unleaded glass powder used for electronic paste and a preparation method thereof. The unleaded glass powder is composed of the following components by mass ratio: 10-60% of diboron trioxide, 2.5-30% of silicon dioxide, 30-75% of bismuth trioxide, 0.1-5% of sodium oxide, 0.1-3% of calcium oxide, 0.5-10% of strontium oxide, 1.5-20% of titanium dioxide, 0.5-8% of zirconium oxide, 0.1-5% of stannic oxide, 0.5-6% of aluminium oxide, 0.5-5% of antimonous oxide and 0.1-5% of calcium fluoride, the components are fully mixed to be uniform and then heated to 1050-1250 DEG C, and heat preservation is carried out for 30-120min, so that raw material is fully melted into glass metal, the glass metal is poured into deionized water to be quenched into glass granules, and ball milling into 320-400 meshes is carried out, thus obtaining the unleaded glass powder. The invention provides an unleaded glass powder with low softening temperature, good chemical stability, appropriate expansion coefficient, acid-base resistance, good abrasive resistance, wide sintering temperature range, low manufacturing cost and no toxic heavy metal oxide, and the unleaded glass powder has wide application range.

Description

[0001] technical field [0002] The invention relates to a lead-free glass powder used for electronic paste and a preparation method thereof, belonging to the fields of electronics and glass powder. Background technique [0003] The mass fraction of glass powder in electronic paste can generally reach 5% to 10%. The performance of glass powder directly affects the quality of electronic products. For example, the melting temperature of glass affects the oxidation and deformation of metal parts of electronic products. The expansion coefficient of glass affects its bonding, sealing and tensile strength with the ceramic glass substrate, and the resistivity and dielectric properties of the glass directly affect the quality and life of electronic products. [0004] The vast majority of traditional glass powders contain heavy lead. Because lead glass has a series of characteristics such as high resistance, low dielectric loss, high refractive index and dispersion, and absorption of...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the problems such as the decrease of chemical stability and wettability, the increase of melting temperature and softening temperature, and the mismatch of expansion coefficients caused b