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Method for preparing split-phase coloring iron black glaze

A technology of iron black and phase separation, which is applied in the field of preparation of high, medium and low temperature ceramic black glazes, can solve the problems of large pollution, non-compliance, high energy consumption, etc., and achieve the effect of improving color stability

Active Publication Date: 2011-02-16
江苏梵想建材科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method of glaze firing is not affected by the atmosphere, it needs to be used in lime glaze that does not contain zinc, and the color is affected by Co 2 o 3 Influenced by the price of raw materials, etc., the cost is very high
In recent years, some scholars have made Co-free Fe-Cr-Mn-Ni system black materials and Fe-Cr-Cu-Ni system black materials (Sun Chen, Yin Shujian, Dai Jun, Dong Bo, Zhang Yuhong. Cobalt-free black materials Application and attention issues. Modern Ceramics and Technology, 1998 (2): 41-44.), but this kind of black glaze still belongs to a kind of isomorphic mixed spinel pigment and Fe 2 o 3 , Mn 2 o 3 The content of isochromatic oxides is relatively high, and color materials need to be pre-synthesized by calcination, elutriation and other processes. The process is relatively complicated, with high energy consumption, high pollution, and relatively high cost, which does not meet the needs of the current international community for energy conservation and emission reduction. , in urgent need of technical improvement and improvement

Method used

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  • Method for preparing split-phase coloring iron black glaze
  • Method for preparing split-phase coloring iron black glaze

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 1) Preparation of boron frit: by mass percentage, 45.5% feldspar, 15.2% quartz, 7.6% calcite, 22.7% boric acid, 4.5% NaNO 3 , 4.5% Li 2 CO 3 Grind the mixture evenly in a mortar, put the mixture into a crucible calcined to 1260°C in a high-temperature furnace, melt it for 10 minutes, and quench water to obtain a boron frit;

[0012] 2) Preparation of glaze slurry: by mass percentage, 44% feldspar, 18% quartz, 4% Suzhou soil, 4% calcite, 14% talc, 4% ZnO, 2% calcium phosphate, 2% % Boron frit, 5% Fe 2 o 3 , 1% of cellulose, 1% of sodium tripolyphosphate and 1% of CMC are mixed, finely ground to 250 mesh, and the specific gravity of the prepared glaze slurry is 1.7g / cm 3 ;

[0013] 3) Apply the glaze slurry evenly on the base, raise the temperature to 1190°C, keep it warm for 40 minutes, and then cool naturally to obtain the phase-separated colored iron black glaze (the parameters of the specific test results of the samples are shown in Table 1).

[0014]

Embodiment 2

[0016] 1) Preparation of boron frit: by mass percentage, 45.5% feldspar, 15.2% quartz, 7.6% calcite, 22.7% boric acid, 4.5% NaNO 3 , 4.5% Li 2 CO 3 Grind the mixture evenly in a mortar, put the mixture into a crucible calcined to 1260°C in a high-temperature furnace, melt it for 10 minutes, and quench water to obtain a boron frit;

[0017] 2) Preparation of glaze slurry: by mass percentage, 40% feldspar, 30% quartz, 3% Suzhou soil, 3% calcite, 5% talc, 2% ZnO, 8% calcium phosphate, 1 % Boron frit, 5% Fe 2 o 3 , 1% cellulose, 1% sodium tripolyphosphate and 1% CMC mixed, finely ground to 250 mesh, the specific gravity of the prepared glaze slurry is 1.6g / cm 3 ;

[0018] 3) Apply the glaze slurry evenly on the base, raise the temperature to 1210°C, keep it warm for 25 minutes, and then cool naturally to obtain the phase-separated colored iron black glaze (the parameters of the specific test results of the samples are shown in Table 2).

[0019]

Embodiment 3

[0021] 1) Preparation of boron frit: by mass percentage, 45.5% feldspar, 15.2% quartz, 7.6% calcite, 22.7% boric acid, 4.5% NaNO 3 , 4.5% Li 2 CO 3 Grind the mixture evenly in a mortar, put the mixture into a crucible calcined to 1260°C in a high-temperature furnace, melt it for 10 minutes, and quench water to obtain a boron frit;

[0022] 2) Preparation of glaze slurry: 55% feldspar, 15% quartz, 5% Suzhou soil, 5% calcite, 8% talc, 1% ZnO, 1% calcium phosphate, 2% by mass percentage % Boron frit, 5% Fe 2 o 3 , 1% of cellulose, 1% of sodium tripolyphosphate and 1% of CMC are mixed, finely ground to 250 mesh, and the specific gravity of the prepared glaze slurry is 1.7g / cm 3 ;

[0023] 3) Apply the glaze slurry evenly on the base, raise the temperature to 1180°C, keep it warm for 45 minutes, and then cool naturally to obtain the phase-separated colored iron black glaze.

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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...

Claims

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Application Information

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IPC IPC(8): C04B41/86C03C8/14
Inventor 王芬周长江朱建锋林营杨海波李强
Owner 江苏梵想建材科技有限公司
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