Longquan celadon glaze, Longquan celadon and preparation method of Longquan celadon

Abstract

The invention discloses Longquan celadon glaze, Longquan celadon and a preparation method of the Longquan celadon. The chemical compositions of oxides of the celadon glaze comprise, by weight, 62%-66% of SiO2, 14%-16% of Al2O3, 0.3%-0.8% of MgO, 11%-17% of CaO, 3%-5% of K2O, 0.2%-0.5% of Na2O, 0-0.25% of TiO2, 0.03%-0.1% of MnO and 0.1%-0.15% of Fe2O3; the celadon glaze is prepared from, by weight, 70%-95% of frit, 0-8% of kaolin, 0-5% of purple clay, 0-15% of quartz and 0-7% of potassium feldspar; the frit is prepared from, by weight, 25%-40% of potassium feldspar powder, 5%-15% of kaolin powder, 5%-10% of quartz, 25%-30% of Longquan porcelain clay, 15%-25% of alumina powder, 5%-10% of calcined talc and 1%-8% of Huangshi glaze soil. According to the Longquan celadon glaze and the Longquan celadon, the fritted glaze breaks through the bottleneck of the prior art, the serious problem that the celadon glaze is poor in color generation when the Longquan celadon is produced on a large scale is solved, and technical support is provided for improving the traditional Longquan celadon to be high-grade celadon through a double-firing process.

Description

technical field [0001] The invention relates to the technical field of celadon, in particular to a Longquan celadon frit glaze and a preparation method thereof. Background technique [0002] Celadon is a perfect combination of science and art, and the industry is developing rapidly. As a UNESCO World Intangible Cultural Heritage List, Longquan celadon has been favored by the market for its warm and jade-like glaze color and smooth and graceful shape. However, due to the mass production of Longquan celadon, it is easy to have the problem of color difference of the same batch of products. [0003] Nowadays, the production of high-end daily-use ceramics at home and abroad usually adopts the second firing process. The second firing includes high-temperature biscuit firing, low-temperature glaze firing or low-temperature biscuit firing and high-temperature glaze firing. Internationally, European and American hard porcelains such as France's Safir Porcelain, Denmark's Copenhag...

AI Technical Summary

Problems solved by technology

The main reason is that after the second glaze firing process, the product has good thermal stability and high glaze strength, but because the blank glaze matures at high temperature, it is difficult to prepare large-scale products with small glaze color difference, good glaze quality, and stable quality.

[0004] At present, the heat treatment temperature of my country's Longquan celadon is fired at about 1200°C to 1280°C. These Longquan celadon are selected from high-quality raw materials, carefully crafted, and through the traditional Longquan celadon porcelain-making process, and the glaze color and jade texture can be obtained through the second firing process. Strong Longquan celadon, but because Longquan celadon celadon is raw glaze, when the same batch of celadon products is large, it is prone to serious color difference