A kind of opal glass and preparation method thereof

Abstract

The invention discloses a piece of emulsion opal glass and a preparation method thereof. The piece of emulsion opal glass adopts a low-alkali and high-calcium component system and particularly comprises the following components: 66 to 70 parts of SiO2, 5.5 to 8.5 parts of Al2O3, 0.5 to 4.0 parts of B2O3, 2.5 to 3.5 parts of Na2O, 0 to 3.0 parts of K2O, 0 to 3.0 parts of ZnO, 13 to 22 parts of CaO, 0 to 4.0 parts of MgO, 0.5 to 5.0 parts of P2O5, and 0.2 part of Sb2O3. The prepared emulsion opal glass has the expansion factor of 53-59*10<-7> / DEG C, is freon-free and harmless, is excellent in heat resistance, and can be taken as a raw material particularly suitable for production of dishware, and the preparation method provided by the invention is energy-saving and environment-friendly, can effectively lower manufacturing cost and can create excellent economic benefits for manufacturers.

Description

technical field [0001] The invention belongs to the technical field of opal glass, and in particular relates to an opal glass suitable for making tableware and a preparation method thereof. Background technique [0002] Tableware has been an important tool for people to communicate with food in daily life since ancient times. The development of tableware plays a vital role in the development of human civilization. In today's society, with the improvement of people's material living standards, there is a higher pursuit of the taste of food, followed by a more stringent demand for daily tableware. [0003] Due to its elegant and atmospheric color, opal glass is widely loved by consumers. In addition, compared with traditional ceramic tableware, opal glass has nearly zero water absorption, easy-to-clean smooth surface and excellent molding processability, and is increasingly used in the field of tableware manufacturing. [0004] As we all know, in the production process of fl...

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Problems solved by technology

The fluorine-containing glass tableware sold by Corning Company solves the problem of fluorine dissolution by lamination method, that is, the middle layer of the product is designed as fluorine-containing opaque glass, and the inner and outer sides are heat-resistant transparent glass, but this process is more complicated and difficult to control. High production cost, not suitable for large-scale promotion

[0005] Chinese patent CN102910818 discloses a zinc borosilicate heat-resistant opaque glass, its product does not contain fluorine, has a low thermal expansion coefficient and high whiteness, but its composition contains 10-15% B 2 o 3 , a large number of B 2 o 3 It is extremely volatile, leading to changes in the glass composition, affecting its opacity and whiteness, and causing damage to the furnace, shortening its service life. In addition, the disclosed opacity glass contains a large amount of ZnO and a small amount of Li 2 O, the raw materials of these two components in the glass system are relatively expensive, which greatly increases the production cost of opal glass

[0006] In addition, in the molding process of glass tableware products, most manufacturers still use the traditional pressing molding method. This molding method has low production efficiency. After the product is formed, it generally needs to be polished, which will further increase the production cost.

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