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Blue ceramic pigment and preparation method thereof

A ceramic pigment and blue technology, which is applied in the field of high-temperature resistant pigments, can solve the problems of reducing the blueness of pigments and reducing the coloring ability of pigments, and achieve the effect of improving color rendering

Pending Publication Date: 2022-06-24
湖州学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the blueness of the pigment obtained after substitution is reduced, reducing the coloring ability of the pigment

Method used

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  • Blue ceramic pigment and preparation method thereof
  • Blue ceramic pigment and preparation method thereof
  • Blue ceramic pigment and preparation method thereof

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preparation example Construction

[0030] A preparation method of blue ceramic pigment, comprising the following steps:

[0031] S1: Mix Mg, Al, Si, Co raw materials and mineralizers uniformly according to the stoichiometric ratio. The raw materials of Mg, Al, Si, and Co are oxides, nitrates, carbonates, Acetate, the mineralizer is one or a combination of NaCl, KCl, LiCl, sodium carbonate, lithium carbonate, potassium carbonate, calcium oxide, and the addition of the mineralizer is Mg, Al, Si, Co raw materials 0-20% of the total weight;

[0032] S2: calcining the mixed powder, the calcination temperature is set to 1100-1500°C, and the calcination time is 1-10h;

[0033] S3: The obtained product is pulverized again, washed with water, and the washing times are 1-5 times;

[0034] S4: the washed product is dried to obtain the final product, and the drying temperature is set at 40-150°C.

Embodiment 1

[0035] Example 1: Mg 1.2 Al 1.6 Si 0.2 Co 0.05 O 4 preparation

[0036] Accurately weigh 2.358g MgO, 3.976g Al 2 O 3 ,0.586g SiO 2 ,1.091g Co(NO 3 ) 2 , put it into a mortar, add an appropriate amount of anhydrous ethanol, grind and mix evenly. The ground mixed powder was placed in a corundum crucible and dried at 80°C for 2 hours. The dried samples were transferred to a muffle furnace, calcined at 800°C for 3 hours, cooled to room temperature and then ground and mixed uniformly. It was calcined again at 1400°C for 5 hours. After cooling, it was ground into fine powder, washed with water, and dried at 80°C for 12 hours to obtain the final product.

[0037] figure 1 Mg calcined at 1400°C 1.2 Al1.6 Si 0.2 Co 0.05 O 4 X-ray powder diffraction (XRD) patterns of ceramic pigments, such as figure 1 As shown, the main crystal phase of the obtained sample is MgAl 2 O 4 Spinel phase. figure 2 Mg calcined at 1400°C 1.2 Al 1.6 Si 0.2 Co 0.05 O 4 SEM photos of ce...

Embodiment 2

[0038] Example 2: Mg 1.4 Al 1.2 Si 0.4 Co 0.05 O 4 preparation

[0039] Accurately weigh 2.751g MgO, 2.982g Al 2 O 3 , 1.172g SiO 2 , 1.091g Co(NO 3 ) 2 , put it into a mortar, add an appropriate amount of anhydrous ethanol, grind and mix evenly. The ground mixed powder was placed in a corundum crucible and dried at 80°C for 2 hours. The dried samples were transferred to a muffle furnace, calcined at 800°C for 3 hours, cooled to room temperature and then ground and mixed uniformly. It was calcined again at 1400°C for 5 hours. After cooling, it was ground into fine powder, washed with water, and dried at 60°C for 24 hours to obtain the final product. Tested by Konica Spectrophotometer (CM-5), the chromaticity parameters of the sample are L=44.78, a=4.43, b=-30.62.

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Abstract

The invention discloses a blue ceramic pigment and a preparation method thereof. The chemical composition of the blue ceramic pigment is Mg < 1 + x > Al < 2-2x > SixO4: yCo (x = 0.05-0.95, y = 0-0.9), raw materials of Mg, Al, Si and Co and a mineralizing agent are uniformly mixed, and the mixture is calcined at 1100-1500 DEG C for 1-10 hours to obtain a final product. According to the invention, Si is co-doped in Co-doped MgAl2O4 to regulate and control the crystal field environment around Co < 2 + > ions, so that high blue degree of the pigment is realized under the condition of low cobalt content. The blue coordinate of the prepared blue ceramic pigment is close to that of CoAl2O4 when the content of the cobalt component is 5wt%, and the blue ceramic pigment has the advantages of good color rendering property, low price and low toxicity, and can replace CoAl2O4 pigment to be used in different industries.

Description

technical field [0001] The invention belongs to the technical field of high temperature resistant pigments, and particularly relates to a blue ceramic pigment and a preparation method thereof. Background technique [0002] Heat-resistant pigments are an important part of colored glass, ceramics and plastics. Compared with ordinary pigments, high-temperature pigments need to go through a high-temperature calcination stage during use, which further narrows the selection range of high-temperature pigments. At present, most of the high-temperature pigments used on the market were developed from the 19th century to the 1960s. With the development of society, people's requirements for color are getting higher and higher. However, in recent years, the research on high-temperature pigments has been seriously lagging behind, and the development of various new high-temperature pigments is very limited. Blue is one of the common main colors in daily life. It is one of the three prim...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C3/06C04B35/195C04B35/626
CPCC09C1/0009C09C3/06C04B35/195C04B35/62605C01P2002/32C01P2004/61C01P2006/65C04B2235/3206C04B2235/3275C04B2235/763C04B2235/9661
Inventor 罗文钦阿尔法巫海燕
Owner 湖州学院
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