A kind of marble tile blank with adjustable coefficient of thermal expansion and preparation method thereof

Abstract

The invention discloses a marble tile blank with an adjustable coefficient of thermal expansion, which comprises the following chemical composition in terms of mass percentage: SiO 2 70~78%, Al 2 o 3 10~17%, CaO 6~10%, MgO 0.8~1.5%, K 2 O 1~1.5% and Na 2 O 1.2~1.6%; among them, Fe 2 o 3 The mass percentage content is less than 0.1%, TiO 2 The mass percentage content is less than 0.1%. The marble tile base material with adjustable thermal expansion coefficient prepared by the invention has the advantages of good plasticity, high drying strength of the base body and being able to match glazes with different thermal expansion coefficients. The volume expansion coefficient of the prepared marble tile body at 400°C is 200-220×10 ‑7 It is continuously adjustable within the range, which greatly increases the adaptability of body and glaze. At the same time, the invention also discloses a method for preparing marble tile blanks with adjustable coefficient of thermal expansion.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a marble tile blank with an adjustable coefficient of thermal expansion and a preparation method thereof. Background technique [0002] Marble tiles belong to glazed polished tiles. During the production process, base glaze, pattern glaze and glaze must be applied sequentially on the ceramic tile body, which requires good adaptability between the glazes to meet the production. Blank glaze adaptability refers to the characteristics that the glaze melt with good melting performance will be closely combined with the blank body to form a perfect whole after cooling, and the glaze surface will not crack and peel off. The factors affecting the adaptability of the blank glaze are more complicated, mainly due to the inappropriate stress in the glaze layer. There are four main reasons for the unsuitable stress of the glaze layer, namely the difference in expansion coefficient between the...

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Problems solved by technology

In the actual production process, the glazes are made and transported by the glaze company, and the ceramic tile manufacturers do not participate in the preparation of the glaze. When the thermal expansion coefficient of the glaze has a large deviation due to raw material batches and process problems , often ceramic tile enterprises have finalized the formula of the body and cannot make major adjustments to match the glaze, resulting in the need for both the ceramic manufacturer and the glaze company to adjust the formula, which will consume more time and affect the production schedule. Productivity and Efficiency

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