Daily-used fine porcelain with high property and preparation method thereof

Abstract

The invention belongs to the technical field of daily-used ceramics, relating to daily-used fine porcelain with high property and a preparation method thereof. The chemical constituents of the daily-used fine porcelain are 52-60% of SiO2, 32-40% of Al2O3, 1-3% of K2O, 1-3% OF Na2O, 1.5-3.5% of CaO, 0.5-1.5% of MgO and 1-2% of P2O5. The adopted raw material formulation is as follows: 40-45% of kaoline, 15-25% of quartz, 10-15% of potassium feldspar, 10-20% of alumina and 8-15% of antireflective agent. The daily-used fine porcelain of the invention integrates three characteristics of high strength, high white and high transparence, and has the characteristics of good molding property, wide sintering arrange and high thermal stability and the like, thereby overcoming the defect of bad light transmittance of normal strengthened porcelain, and solving the problems of uneasy molding and narrow sintering arrange of high-grade porcelain such as steatite porcelain and bone porcelain. The porcelain is sintered at the temperature of 1270-1320 DEG C, is easy to be produced and promoted, and is hopeful to become novel high-grade daily-used fine porcelain after bone porcelain and steatite porcelain.

Description

Technical field [0001] The invention belongs to the technical field of daily-use ceramics, and relates to a high-performance daily-use fine porcelain and a production method thereof. Background technique [0002] High whiteness, high transparency and high strength have always been the goals pursued by domestic and foreign advanced daily fine porcelain. Although the existing bone ash porcelain, talc porcelain and high quartz porcelain meet the requirements of high whiteness, high permeability and high strength, they all have two common shortcomings: one is that the thermal expansion coefficients of the three are very large. The expansion coefficients of talc porcelain and high quartz porcelain are 8~9×10 respectively -6 / ℃、7.8~8×10 -6 / ℃ and 7.5~8.0×10 -6 / ℃. The greater the thermal expansion coefficient of ceramics, the greater the thermal stress that it generates with temperature changes, and as a result, the thermal stability of the product is likely to be poor. For example, t...

AI Technical Summary

Problems solved by technology

Although the existing bone china, talc and high-quartz porcelain meet the requirements of high whiteness, high transparency and high strength, they all have two common shortcomings: one is that the thermal expansion coefficients of the three are very large, and bone china, The expansion coefficients of steatite porcelain and high quartz porcelain are 8~9×10 -6 / ℃, 7.8~8×10 -6 / ℃ and 7.5~8.0×10 -6 / °C

For steatite porcelain and high-quartz porcelain, if the ratio of glass phase to crystal phase, crystal phase particle size and crystal phase transformation in the porcelain body are not well controlled, their thermal stability is difficult to achieve after 180 ° C ~ 20 ℃ water heat exchange once the standard without cracking

The second shortcoming of these three types of high-grade daily-use fine porcelain is that it is difficult to control the process.

For example, both bone china and talc porcelain have the fatal weaknesses of poor molding performance and narrow firing range; high-quartz porcelain has problems such as high requirements for quartz particle gradation, and the amount of cristobalite in the porcelain body is difficult to control.

[0003] The usual feldspar-quartz-kaolin ternary system and sericite-quartz-kaolin ternary system high-grade daily-use fine porcelain have the advantages of high thermal stability, good molding performance, and wide firing range, but they cannot combine high whiteness, High transparency and high strength in one

In these two ternary system porcelain bodies, the two performance requirements of "high strength" and "high transparency" are contradictory in the preparation process, because porcelain bodies with high light transmittance often contain more glass phases. The strength of the glass phase is much lower than that of the crystal phase, so while increasing the glass phase to increase the light transmittance of the porcelain body, it is bound to reduce the mechanical strength of the product

On the other hand, introducing Al into the formulation 2 o 3 Can significantly improve the strength of the porcelain body, so as to achieve the goal of "high strength", but the introduction of Al 2 o 3 The particles will greatly increase the scattering effect of the ceramic body on visible light, resulting in poor light transmission. For example, although the usual high-alumina reinforced porcelain has high strength, its light transmission is not satisfactory.

Since "high white" can be achieved by selecting raw materials with low impurity content such as Fe and Ti and multiple iron removal processes, for these two ternary system porcelains, "high white and high transparency" or "high white and high strength" can be achieved, but the goal of "high whiteness, high transparency and high strength" cannot be achieved

[0004] To sum up, the above-mentioned high-grade daily-use fine porcelain of various materials cannot meet the requirements in terms of performance and craftsmanship at the same time. Therefore, a new material of high-performance daily-use fine porcelain is developed, which not only has "high whiteness, high transparency And high strength, but also has the advantages of high thermal stability, good formability, wide firing range, etc., which is very meaningful