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Method for manufacturing red ceramic pigment of silicoferrite

A technology of ceramic pigments and production methods, applied in the direction of fibrous fillers, etc., can solve the problems of application range influence, color difference, lightening, etc., and achieve the effect of good stability and small change of color difference

Active Publication Date: 2011-06-01
肇庆市欧陶新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The main raw material of ferrosilicon red ceramic pigment is SiO 2 and Fe 2 o 3 , due to its wide range of raw material resources and low price, the price of finished products is cheap and welcomed by the market, but users find that it has serious color difference problems caused by fluctuations in temperature, atmosphere and other factors during use. range affected
[0003] The main reason for the poor stability of the ferrosilicon red ceramic pigment is Fe 2 o 3 not covered by SiO 2 valid package
First, when it is exposed to high-temperature flue gas above 1000 °C, Fe 3+ May become Fe 2+ and lose the red color; secondly, at high temperature, Fe 2 o 3 It is easy to react with MgO in the environment and cause color instability, resulting in color difference or lightening of color

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1): firstly mix 84% silicon dioxide (SiO 2 ) and 16% of ferric oxide (Fe 2 o 3 ) into the ball mill for 13 hours;

[0021] 2): then adding in addition in the ball mill is 3% lanthanum carbonate (La 2 (CO 3 ) 3 ·8H 2 0), ball milling for 2 hours;

[0022] 3): calcining the material obtained in step 2 at 950° C. for 15 hours;

[0023] 4): Crushing the material obtained in step 3 to a particle size of 25 μm.

[0024] The iron-silicon red ceramic pigment obtained in this implementation method has the characteristic of being usable at a relatively low temperature, and is suitable for producing ceramic products with a firing temperature lower than 1050°C.

Embodiment 2

[0026] 1): firstly mix silicon dioxide (SiO2) with a mass percentage of 89% 2 ) and 11% of ferric oxide (Fe 2 o 3 ) into the ball mill for 22 hours;

[0027] 2): then adding in addition in the ball mill is 0.3% lanthanum carbonate (La 2 (CO 3 ) 3 ·8H 2 0), ball milling for 4 hours;

[0028] 3): calcining the material obtained in step 2 at 1100° C. for 10 hours;

[0029] 4): Crushing the material obtained in step 3 to a particle size of 35 μm.

[0030] The iron-silicon red ceramic pigment obtained in this implementation method is suitable for producing ceramic products with a firing temperature of 1050°C to 1150°C.

Embodiment 3

[0032] 1): Firstly, silicon dioxide (SiO2) with a mass percentage of 86% 2 ) and 14% of ferric oxide (Fe 2 o 3 ) into the ball mill for 30 hours;

[0033] 2): then adding in addition in the ball mill is 4% lanthanum carbonate (La 2 (CO 3 ) 3 ·8H 2 0), ball milling for 5 hours;

[0034] 3): calcining the material obtained in step 2 at 1150° C. for 4 hours;

[0035] 4): The material obtained in step 3 is put into a crusher and crushed to a particle size of 48 μm.

[0036] The ferrosilicon red ceramic pigment obtained in the implementation method is suitable for producing ceramic products with a firing temperature exceeding 1150°C.

[0037] The lanthanum carbonate (La carbonate) that adds in this preparation method 2 (CO 3 ) 3 ·xH 2 O) will be decomposed at 900°C to generate highly chemically active lanthanum oxide. At the same time, because lanthanum has a large atomic radius, it can be filled with silicon dioxide (SiO 2 ) coated with ferric oxide (Fe 2 o 3 ) when...

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PUM

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Abstract

The invention discloses a production method for an environmentally friendly, cheap and stable ceramic colorant which is a ferrosilicon red ceramic colorant. The key point of the method is: lanthanum carbonate is introduced into a formulation and is used to effectively and completely enwrap ferric oxide together with silicon dioxide through high-activity lanthana decomposed from the lanthanum carbonate at a temperature of 900 DEG C and the property of having a greater atomic radius of the lanthanum carbonate, thereby enabling the ferric oxide to show stable colors without impacts from ambientsurroundings. In addition, the ferrosilicon red ceramic colorant adapted to different temperatures is manufactured through changing the processing conditions.

Description

technical field [0001] The invention relates to a method for manufacturing ceramic color material, in particular to a method for manufacturing ferrosilicon red ceramic color material. Background technique [0002] The main raw material of ferrosilicon red ceramic pigment is SiO 2 and Fe 2 o 3 , due to its wide range of raw material resources and low price, the price of finished products is cheap and welcomed by the market, but users find that it has serious color difference problems caused by fluctuations in temperature, atmosphere and other factors during use. Range is affected. [0003] The main reason for the poor stability of the ferrosilicon red ceramic pigment is Fe 2 o 3 not covered by SiO 2 valid package. First, when it is exposed to high-temperature flue gas above 1000 °C, Fe 3+ May become Fe 2+ and lose the red color; secondly, at high temperature, Fe 2 o 3 It is easy to react with MgO in the environment and cause color instability, resulting in color di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/28
Inventor 张俊峰傅学友
Owner 肇庆市欧陶新型材料有限公司
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