High-strength magnesia porcelain ultrathin plate and preparation method thereof

Abstract

The invention relates to a high-strength magnesia porcelain ultrathin plate with thickness of 0.5-1.5mm and strength of 160MPa-200MPa. The high-strength magnesia porcelain ultrathin plate is prepared from the following mineral raw materials in percentage by mass through an aqueous tape casting technology: 70wt%-75wt% of talcum, 10wt%-15wt% of kaolin, 6wt%-10wt% of potassium feldspar, 2wt%-5wt% of barium carbonate, 1wt%-3wt% of zinc oxide, and 4wt%-6wt% of other alkaline earth metallic minerals. The slurry mixing process mainly comprises four stages including high-speed ball milling, dispersing by means of rapid milling and slow milling, plastifying and tackifying by means of slow milling, and stirring for removing bubbles under a vacuum condition; and then, the high-strength porcelain ultrathin plate is obtained through a tape casting firing step. The high-strength magnesia porcelain ultrathin plate has the characteristics of light weight, excellent light transmission, exquisite texture, high whiteness, and on the like; moreover, the high-strength magnesia porcelain ultrathin plate is easy to implement in industrialization, and has stability and high uniform performance in large-scale preparation.

Description

technical field [0001] The invention relates to a high-strength magnesia ceramic ultra-thin plate and a preparation method thereof, belonging to the technical field of traditional ceramic preparation. Background technique [0002] Generally, traditional ceramics can be divided into feldspar porcelain, bone china and magnesia porcelain according to the quality of porcelain. Among them, the flexural strength of feldspar porcelain is generally about 80MPa, and that of bone china is above 137Mpa. The flexural strength of magnesia porcelain is about 145MPa. Magnesia porcelain plays an important role in electric porcelain because of its good insulation. Magnesia porcelain also has the advantages of high mechanical strength, good thermal stability, fine and white porcelain, and good light transmission. The daily-use porcelain tableware, Compared with traditional porcelain, tea sets have a different charm, and are very popular in domestic and foreign markets. The ultra-thin magnes...

AI Technical Summary

Problems solved by technology

According to MgO-A1 2 o 3 -SiO 2 The ternary system phase diagram systematically analyzes the influence of the amount of talc, feldspar and kaolin on the strength of magnesia porcelain, and provides a magnesia porcelain formula with high flexural strength and wide firing range. Using this formula, water system casting is further adopted By optimizing the preparation process and selecting appropriate dispersants, plasticizers and binders, the problems of uneven particle dispersion and stress between particles in the green sheet were effectively overcome, and high-strength (160MPa-200MPa) Ceramic ultra-thin plate, the thickness of the ultra-thin plate is 0.5-1.5mm, the area size ranges from tens of square centimeters to hundreds of square centimeters or even larger, depending on its forming equipment (the width and length of the casting machine) and Dimensions of the firing equipment (width and length of the kiln)

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