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Preparation method for purple archaistic ceramic pigment

A technology for purple pigments and ceramics, applied in the field of preparation of antique ceramic purple pigments, can solve the problems of low product quality, harsh reaction conditions, high environmental hazards, etc. Effect

Active Publication Date: 2017-02-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such preparation technique has obvious shortcoming: one, the barium sulfate property as barium source is stable, insoluble in water, acid, alkali or organic solvent, so mostly adopt the mode of solid-state reaction with other reactant, so reaction conditions more demanding
Simultaneously another kind of barium source---barium carbonate has hypertoxicity, and is harmful to environment greatly; Its 2nd, the added auxiliary agent---lead salt itself is also bigger to human body and environmental hazards; 3rd, because final calcination actually It is a solid-phase reaction process, so the calcination temperature often exceeds the high temperature above 900 ° C, and the energy consumption is large; Fourth, the solid-phase reaction products are often impure and there are many impurity phases
That is to say, such a preparation process has problems such as high energy consumption, low product quality and environmental protection.

Method used

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  • Preparation method for purple archaistic ceramic pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Design Chinese violet pigment components according to the molar ratio of n(Ba):n(Cu):n(Si)=1:1:2. First weigh a certain amount of Na 2 SiO 3 9H 2 O, use deionized water to prepare an aqueous solution with a concentration of 0.60 mol / L. Then weigh barium nitrate Ba(NO) according to the designed molar ratio 3 ) 2 and copper nitrate Cu(NO 3 ) 2 ·3H 2 O chemical reagents, and dissolved with appropriate amount of deionized water.

[0042] (2) Put the sodium silicate aqueous solution in a constant temperature magnetic stirrer, continuously stir at 45°C and add the copper nitrate solution dropwise, and continue to add the barium nitrate solution dropwise after 10 minutes, and continue to stir at a constant temperature for 30 minutes to obtain silicic acid Copper-barium copolymer precipitate suspension.

[0043] (3) The resulting copolymerized precipitate suspension was washed and suction-filtered three times, and dried in an oven at 90°C. The obtained powder is t...

Embodiment 2

[0046] (1) Design Chinese violet pigment components according to the molar ratio of n(Ba):n(Cu):n(Si)=1:1:2. First weigh a certain amount of Na 2 SiO 3 9H 2 O, use deionized water to prepare an aqueous solution with a concentration of 0.50 mol / L. Then weigh barium nitrate Ba(NO) according to the designed molar ratio 3 ) 2 and copper nitrate Cu(NO 3 ) 2 ·3H 2 O chemical reagents, and dissolved with appropriate amount of deionized water.

[0047] (2) Put the sodium silicate aqueous solution in a constant temperature magnetic stirrer, continuously stir at 50°C, and add the copper nitrate solution dropwise, after 5 minutes, continue to add the barium nitrate solution dropwise, and continue to stir at a constant temperature for 20 minutes to obtain silicic acid Copper-barium copolymer precipitate suspension.

[0048] (3) The resulting copolymerized precipitate suspension was washed and suction-filtered three times, and dried in an oven at 80°C. Then grind and compact the ...

Embodiment 3

[0051] (1) Design Chinese violet pigment components according to the molar ratio of n(Ba):n(Cu):n(Si)=1:1:2. First weigh a certain amount of Na 2 SiO 3 9H 2 O, use deionized water to prepare an aqueous solution with a concentration of 0.55mol / L. Then weigh barium nitrate Ba(NO) according to the designed molar ratio 3 ) 2 and copper nitrate Cu(NO 3 ) 2 ·3H 2 O chemical reagents, and dissolved with appropriate amount of deionized water.

[0052] (2) Put the sodium silicate aqueous solution in a constant temperature magnetic stirrer, continuously stir at 40°C, and add the copper nitrate solution dropwise, after 8 minutes, continue to add the barium nitrate solution dropwise, and continue to stir at a constant temperature for 20 minutes to obtain silicic acid Copper-barium copolymer precipitate suspension.

[0053] (3) The resulting copolymerized precipitate suspension was washed twice with suction and filtered, and dried in an oven at 90°C. The obtained powder is then g...

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Abstract

The invention discloses a preparation method for purple archaistic ceramic pigment. The preparation method comprises the following steps: with Na2SiO3.9H2O (sodium metasilicate nonahydrate) as a silicon source and Cu(NO3)2 (cupric nitrate) and Ba(NO3)2 (barium nitrate) as a copper source and a barium source respectively, carrying out batching according to the chemical structural formula of Chinese purple and preparing a barium copper silicate performed polymer under magnetic stirring at a constant temperature; after dehydration and drying, carrying out a hydrothermal autoclave reaction at 160 to 180 DEG C so as to prepare a barium copper silicate pre-crystal; and carrying out crystallization sintering at a low temperature of 650 to 750 DEG C so as to obtain the Chinese purple archaistic ceramic pigment with a brilliant color and high purity and in good crystallization state.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of ancient ceramic pigments, in particular to an antique ceramic purple pigment (BaCuSi 2 o 6 ) preparation method. [0003] 【Background technique】 [0004] Non-natural pigments were rare in ancient times, especially blue-violet, which is rare. Both China Violet and China Blue have been confirmed to be artificial blue-violet that appeared before the industrial society. Both of them have copper silicate structure. They are a kind of inorganic pigments artificially prepared in ancient China. stage product of development. The production and use of copper silicate pigments has become an important goal of the current antiquity research, which is of great significance to the resynthesis and imitation of ancient cultural relics. [0005] The discovery of copper barium silicate pigments in cultural relics began in 1983, and then people carried out a comprehensive analysis of copper silicate pigments. The research...

Claims

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Application Information

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IPC IPC(8): C01B33/20C04B41/85
CPCC01B33/20C04B41/5024C04B41/85
Inventor 张超武张楠张利娜王夏云王芬
Owner SHAANXI UNIV OF SCI & TECH
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