Lead-free cadmium-free ceramic pigment on glaze and preparation method thereof

A ceramic pigment and weight technology is applied in the field of improved on-glaze lead-free and cadmium-free ceramic pigments and its preparation field, which can solve the problems of acid resistance and alkali erosion resistance, impure coloring of colorants, and influence on market competitiveness. , to achieve the effect of good acid and alkali corrosion resistance, bright color and compact structure

Inactive Publication Date: 2007-10-17
山东省淄博市博山长虹陶瓷装饰材料厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] ①Chemical stability becomes poor:
[0007] Bi 2 o 3 The introduction of glass will easily lead to phase separation of glass, and it is difficult to form a uniform glass body, resulting in loose flux structure, thus affecting chemical stability
The performance of acid and alkali corrosion resistance will also decrease
[0008] ② Bi 2 o 3 The addition of the colorant will lead to impure color
[0009] ③The thermal expansion coefficient is too high, resulting in a mismatch with the expansion coefficient of the ceramic glaze, which is likely to cause defects such as "exploding porcelain"
[0010] ④ Bi 2 o 3 Higher prices lead to an increase in product costs and affect market competitiveness

Method used

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preparation example Construction

[0033] The preparation method of the glaze ceramic pigment in the embodiment is to prepare the flux first, and then prepare the pigment according to the composition ingredients, and the steps are as follows:

[0034] ①Preparation of flux: Mix the raw materials required for the solvent according to the proportion and evenly pass through a 100-mesh sieve, quench in molten water at a temperature of 1300±30°C, and dry for later use;

[0035] ②Ball milling: Fill the flux and related colorants in proportion to the ball mill until the particle size is less than 10 microns, and then leave the mill and dry it for later use;

[0036] ③Reburning: reburning and quenching the ball-milled mixture at a temperature of 800±20°C;

[0037] ④Secondary grinding: Put the water-quenched material after reburning into the ball mill for wet grinding until the particle size is less than 5 microns, and then the pigment products are milled, dried and crushed.

[0038] The composition of the overglaze cer...

Embodiment 6-12

[0043] According to the composition and ingredients, the flux is prepared first, and then the pigment is prepared. The steps are as follows:

[0044] ①Preparation of flux: Mix the raw materials required for the solvent according to the proportion and evenly pass through an 80-mesh sieve, and quench in molten water at a temperature of 1280±10°C;

[0045] ②Ball milling: put 90% of the weight of 1# flux into the ball mill in proportion to the remaining amount of blue-green, dark green, sea blue, vanadium blue, deep black, silver gray and white colorants until the particle size is less than 10 microns. Grind and dry for use;

[0046] ③ Re-burning: the ball-milled mixture is re-fired and water-quenched at a temperature of 780±20°C;

[0047] ④Secondary grinding: Put the water-quenched material after reburning into the ball mill for wet grinding until the particle size is less than 5 microns, and then the pigment products are milled, dried and crushed.

Embodiment 12-16

[0049] According to the composition and ingredients, the flux is prepared first, and then the pigment is prepared. The steps are as follows:

[0050] ①Preparation of flux: Mix the raw materials required for the solvent according to the proportion and evenly pass through a 90-mesh sieve, and quench in molten water at a temperature of 1290±20°C;

[0051] ②Ball milling: 85% by weight of 3# flux and the rest of the purplish red, deep red, peach red and purple blue agents are loaded into the ball mill in proportion to the particle size <10 microns, and the mill is dried for later use;

[0052] ③ Re-burning: the ball-milled mixture is re-fired and water-quenched at a temperature of 820±10°C;

[0053] ④Secondary grinding: Put the water-quenched material after reburning into the ball mill for wet grinding until the particle size is less than 5 microns, and then the pigment products are milled, dried and crushed.

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PUM

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Abstract

The invention relates to a lead-free and cadmium-free porcelain pigment, composed by 70-92wt% solvent and 8-30wt% toner. The solvent is composed by SiO2 30-60wt%, B2O3 5-35 wt%, Al2O3 1.5-15 wt%, Na2O 1.5-10 wt%, K2O 1.5-10 wt%, Li2O 0-8 wt%, ZrO2 0-10 wt%, SnO2 0-10 wt%, TiO2 0-5 wt%, CoO 0-10 wt%, ZnO 0-15 wt%, BaO 0-5 wt%, CaO 0-5 wt%, La2O3 0-2 wt%, Nd2O3 0-2 wt%, prepared in the following orders: preparation of the solvent, ball milling of the solvent and the toner in mixture, re-burning, and fine milling to produce the pigment product. The product is characterized in high gloss, high thermal-stability and chemical-stability after glazing the ceramic pigment, and also pure and bright color, low cost, complete varieties of the pigments, free of lead and cadmium heavy metals in the components, no lead and cadmium dissolve-out, safety and credibility and capable of completely substituting the traditional lead and cadmium series pigments.

Description

technical field [0001] The invention relates to an improved lead-free and cadmium-free ceramic pigment on glaze and a preparation method thereof. Background technique [0002] The most widely used decorative method for ceramic products is overglaze color, which is used at a low temperature of 750-850°C, so in the traditional production process, 30-50% lead oxide needs to be added to the flux to make the ceramic overglaze pigment The range of roasting temperature is wide and the hair color is pure, and the cadmium oxide colorant has become an indispensable color system in the field of ceramic product decoration with its unique and brilliant colors. The pollution of water resources and the harm to the human body have attracted worldwide attention, especially the dissolution of lead and cadmium on the surface of tableware and drinking utensils are potential carcinogens and pose a threat to people's health. In order to reduce and eradicate the poisoning of heavy metals such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85
Inventor 任明祥陈克玲孙元清
Owner 山东省淄博市博山长虹陶瓷装饰材料厂
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