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Mixed spinel type black ceramic pigment and preparation method thereof

A black ceramic and spinel-type technology, applied in the field of ceramic pigments, can solve the problems of the precipitation mechanism of colored spinel, achieve good coloring performance, pure color, and reduce uncertainty

Active Publication Date: 2020-09-15
WUHAN UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method shortens the firing time, there is a problem that the precipitation mechanism of colored spinel in Fe-Cr-Ni-Mn black ceramic pigments has not been studied

Method used

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  • Mixed spinel type black ceramic pigment and preparation method thereof
  • Mixed spinel type black ceramic pigment and preparation method thereof
  • Mixed spinel type black ceramic pigment and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0027] The invention provides a kind of preparation method of mixed spinel type black ceramic pigment, comprises the steps:

[0028] S1, using the thermodynamic database software, set the predetermined simulation conditions, the Fe of the predetermined raw material ratio 2 o 3 -Cr 2o 3 The solidification process of -MnO-NiO system is simulated and calculated, and the Fe is optimized and determined according to the phase composition and color performance in the simulation results. 2 o 3 -Cr 2 o 3 - the mass fractions of the four raw material components in the MnO-NiO system to obtain Fe 2 o 3 -Cr 2 o 3 - The optimal mass ratio of the MnO-NiO system is 1:(1.6-2.4):(0.7-1.1):(0.8-1.2);

[0029] S2, according to the Fe described in step S1 2 o 3 -Cr 2 o 3 -Optimized mass ratio of the MnO-NiO system, the Fe 2 o 3 、Cr 2 o 3 The four raw material powders of , MnO and NiO are prepared in proportion, and then mixed evenly to obtain a mixed material;

[0030] S3, unde...

Embodiment 1

[0041] A kind of preparation method of mixed spinel type black ceramic pigment:

[0042] S1, using Factsage7.0 simulation calculation to obtain the optimal proportion range, the specific process of simulation calculation is as follows:

[0043] Using the Equilib module of FactSage7.0 to calculate Fe 2 o 3 -Cr 2 o 3 -Phase composition and spinel content of MnO-NiO system at different mass ratios;

[0044] 1) Databases: FactPS and FToxid.

[0045] 2) Types of compounds: gases and pure solids.

[0046] 3) Solid solution settings: FToxid-SLAGA, FToxid-SPANA.

[0047] 4) The simulation calculation conditions are: the initial solidification temperature is set to 2250 °C, the calculation temperature interval is 100 °C, the simulation calculation process ends when the target phase FToxid-SLAGA completely disappears, the system pressure is set to 1 atm, and the optimal ratio is calculated. way to export and further process in Origin software.

[0048] Fe was obtained by simulat...

Embodiment 2

[0054] The difference with Example 1 is: the optimal mass ratio is set to 1:2:1:1, namely Fe 2 o 3 3.0g, Cr 2 o 3 6.0g, MnO 3.0g, and NiO 3.0g, and other steps are the same as in Example 1, and will not be repeated here.

[0055] The CIE parameters of the prepared black ceramic pigment were tested, and the result was that the L value was 19.18, the a value was 1.67, and the b value was 0.18, indicating that the black ceramic pigment prepared in this example had high blackness and good color rendering effect.

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Abstract

The invention provides a mixed spinel type black ceramic pigment and a preparation method thereof. The method comprises the following steps: 1) determining an optimized mass ratio of a Fe2O3-Cr2O3-MnO-NiO system according to thermodynamic database software, and then preparing and uniformly mixing four raw materials according to the optimized mass ratio to obtain a mixture; and 2) calcining the mixture at a high temperature, heating in an air atmosphere, keeping the temperature for 20-50 minutes when the temperature of the mixture rises to 1100-1200 DEG C, and cooling to room temperature to obtain the black ceramic pigment. The optimal proportion of the Fe2O3-Cr2O3-MnO-NiO system is adopted, most preferably, the sintering temperature, the heat preservation time and the cooling mode are adopted, and finally, the cobalt-free black ceramic pigment product taking the colored spinel FeCr2O4, NiCr2O4, NiFe2O4, Fe3O4 and MnFe2O4 as main components is obtained. By fully combining theoretical simulation calculation, the prepared black ceramic pigment has the characteristics of high blackness, pure color and good coloring performance, and overcomes the defect of addition of expensive cobalt oxide in the prior art.

Description

technical field [0001] The invention belongs to the technical field of ceramic pigments, in particular to a mixed spinel type black ceramic pigment and a preparation method thereof. Background technique [0002] Black ceramic pigments are the most widely used pigments in ceramic decoration materials, accounting for about 25% of the total raw materials used, and have excellent thermal stability, chemical stability and weather resistance. In terms of decorative effect, black ceramic products have always been favored by people for their pure, elegant and noble characteristics. Generally, crystal coloring is used to prepare black pigments: metal oxides such as chromium, iron, manganese, nickel, copper, and cobalt form mixed spinel crystals. These metal elements belong to the transition metal elements of the fourth period in the periodic table, and the outermost layer of electrons is the d orbital, which is a non-spherical symmetrical orbit. When these ions are in the coordinati...

Claims

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Application Information

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IPC IPC(8): C09C1/00G16C20/10G16C60/00
CPCC09C1/0009G16C20/10G16C60/00
Inventor 马国军王强张翔刘孟珂李志
Owner WUHAN UNIV OF SCI & TECH
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