Method for preparing split-phase coloring iron black glaze

Abstract

The invention relates to a method for preparing split-phase coloring iron black glaze, which comprises the steps of: preparing a boron frit: uniformly grinding feldspar, quartz, calcite, boric acid, NaNO3 and Li2CO3 in a mortar, putting a material mixture in a high-temperature furnace into a crucible calcined to a temperature of 1260 DEG C, melting for 10min and hardening; mixing the feldspar, the quartz, Suzhou soil, the calcite, talcum, ZnO, calcium phosphate, the boron frit, Fe2O3, cellulose, sodium tripolyphosphate and CMC (Carboxy Methylated Cellulose), finely grinding to 250-mesh, regulating the specific weight of glaze slip to be 1.7g / cm<3>; and uniformly applying the glaze slip to a blank, raising the temperature to 1160-1240 DEG C, insulating for 20-50min, then naturally cooling. The coloring is carried out by using split-phase textures generated by the frit in a glaze firing process. Less coloring oxides are used to generate higher coloring capacity, thus, iron black glaze which has the content of ferric oxide only accounting for 30-50 percent relative to that of a color material in the common glaze and has the advantages of low cost, high stability and high blackness is prepared.

Description

technical field

[0001] The invention relates to a preparation method of phase-separated colored iron black glaze, in particular to a preparation method of black glaze which can be used for architectural sanitary ceramics, daily ceramics, art ceramics and other high, medium and low temperature ceramics. Background technique

[0002] Black glaze is a precious glaze. Decorating porcelain with black glaze is an ancient and traditional method in my country. The Shangyu black glaze of the Eastern Han Dynasty and the Deqing kiln black glaze of the Eastern Jin Dynasty have always been loved by people for their dignified, solemn and steady color characteristics. These black glazes are made by firing iron-containing clay in a reducing atmosphere. Its color is extremely unstable, and the firing process is difficult to master. With the development of modern ceramic industry, Co 2 o 3 , Fe 2 o 3 、Cr 2 o 3 , Mn 2 o 3 The metal oxides are first prepared into pigments, and then add...

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