Barium oxide based crystal lead-free glass and preparation method thereof

Abstract

Disclosed are barium oxide crystal lead-free glass and a preparation method thereof. The components include SiO2, Na2O, K2O, BaO, ZnO, B2O3 and a little K2Cr2O7, MnO2 or CeO2. The preparation method includes subjecting all the components to ball-milling, 80 mesh sieving, heating and melting after even mixing to obtain even glass melted liquid, blowing the glass melted liquid or pouring the glass melted liquid for molding, and annealing after molding to obtain transparent, even and bubble-free bulk glass or a product. The barium oxide crystal lead-free glass and the preparation method thereof adopt a lead-free glass formula and traditional glass melting technology and have the advantages of being simple in preparation method, low in production cost, environment-friendly, non-poisonous and innocuous to human bodies, capable of replacing lead crystal glass commonly used in the finishing material product market and satisfying the requirement of market for high range crystal glass products, and suitable for industrial production.

Description

technical field [0001] The invention discloses a barium oxide-based crystal lead-free glass and a preparation method thereof, and is a lead-free crystal glass material which can replace lead crystal glass and a preparation method thereof. The invention belongs to the technical field of new decorative glass materials and its preparation. technical background [0002] Lead crystal glass, also known as artificial crystal, has high transparency, bright and clean, like natural crystal. Lead crystal glass is loved by people for its crystal clear, dazzling, and pure sound quality, and is widely used as decorations in people's daily life, public places, and social environments. [0003] Traditional lead crystal glass uses lead oxide as the main component. Pb 2+ [PbO that can form tetragonal pyramids 4 ], thus forming a helical chain structure, and with [SiO in glass 4 ] are connected to form a special network structure. Therefore, the formation range of lead-containing silicate...

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Problems solved by technology

Chinese patent (publication number 101215084A) has reported the composition and preparation technology of a kind of lead-free glass, and the main purpose of the invention is to solve the existing crystal glass because of lead and arsenic and the pollution that causes to the environment and the encroachment problem to the person, its The glass composition is: SiO 2 , B 2 o 3 , Li 2 O, Na 2 O, K 2 O, TiO 2 , ZnO 2 , ZrO 2 、Al 2 o 3 , CaO, Sb 2 o 3 And fluoride, density, refractive index, visible light transmittance and acid resistance are given in the examples, but properties such as water resistance, alkali resistance, thermal expansion system, transition temperature and softening temperature are not given, and the density of the obtained glass is relatively It is smaller in terms of crystal glass; at the same time, a higher content of TiO is introduced into the composition 2 and ZrO 2 , it is easy to cause crystallization; the introduction of fluoride is easy to corrode the refractory material and make the product mixed with impurities

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