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Vanadium-doped calcium zirconate inorganic pigment and preparing method thereof

A technology of inorganic pigments and calcium zirconate, which is applied in the direction of inorganic pigment treatment, chemical instruments and methods, and fibrous fillers. Insufficient stain resistance, mitigation of heat island effect, and improvement of color performance

Inactive Publication Date: 2016-04-13
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

White-coated buildings, cars, ships, etc. can effectively reflect the energy of sunlight, but the white coating is not resistant to dirt, the dirt is very conspicuous, and it cannot meet people's aesthetic requirements
At present, a small amount of infrared reflective pigments have been developed, such as U.S. Patents US6468647, US6521038, US7455904, and US6468647, which report pigments containing transition metal elements or rare earth elements, but these pigments have many defects, such as toxic metal elements exceeding the standard, reflective properties Not good enough, the preparation process is complicated, etc.

Method used

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  • Vanadium-doped calcium zirconate inorganic pigment and preparing method thereof
  • Vanadium-doped calcium zirconate inorganic pigment and preparing method thereof

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preparation example Construction

[0021] The preparation method of the present invention comprises the following steps:

[0022] (1) According to the molar ratio of calcium carbonate: zirconia: vanadium pentoxide=1: (1-x): x, calcium carbonate, zirconia and vanadium pentoxide are used, wherein 0<x≤0.4.

[0023] (2) Dry ball mill the above raw materials for 24-48 hours and mix them evenly.

[0024] (3) Calcinate the mixture after dry ball milling at 1400-1700°C for 2-10 hours, after it is cooled, put it into a ball mill for 24-48 hours, and grind it into powder to obtain vanadium-doped zirconic acid Calcium inorganic pigments.

[0025] The vanadium-doped calcium zirconate inorganic pigment that the present invention makes is that chemical formula can be written as CaZr (1-x) V x o 3 , 0<x≤0.4, which is a perovskite structure.

Embodiment 1

[0028] According to the molar ratio of calcium carbonate: zirconia: vanadium pentoxide = 1:0.9:0.1, take the raw materials calcium carbonate, zirconia and vanadium pentoxide, put them into a ball mill for dry mixing and ball milling for 24 hours; the mixture after ball milling Calcined in a resistance furnace at 1600°C for 3 hours, after cooling, put it into a ball mill for 24 hours, and grind it into powder to obtain a yellow pigment sample, whose chemical formula is CaZr 0.9 V 0.1 o 3 .

[0029] The prepared above-mentioned pigment samples were subjected to RigakuUltima Ⅳ X-ray diffractometer (XRD), using CuK in the range of 2θα1 (λ=0.15418nm) the obtained powder of radiation photodetection, XRD collection of patterns such as figure 1 As shown, it can be indicated as a perovskite phase.

[0030] According to the CIE1976CIE color scale, the chromaticity coordinates of this embodiment are L*=93.66, a*=-4.73, b*=34.65, C*=34.97; values ​​a* (red-green axis) and b* (yellow-bl...

Embodiment 2

[0042] According to the molar ratio of calcium carbonate: zirconia: vanadium pentoxide = 1:0.6:0.4, take the raw materials calcium carbonate, zirconia and vanadium pentoxide, put them into a ball mill for dry mixing and ball milling for 36 hours; the mixture after ball milling Calcined in a resistance furnace at 1400°C for 10 hours, after cooling, put it into a ball mill for 36 hours, and grind it into powder to obtain a yellow pigment sample, whose chemical formula is CaZr 0.6 V 0.4 o 3 .

[0043] The measured chromaticity coordinates of this embodiment are L*=97.05, a*=-3.01, b*=27.88, C*=28.04, and the near-infrared reflectivity is 83.74%.

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Abstract

The invention relates to a vanadium-doped calcium zirconate inorganic pigment and a preparing method thereof. The preparing method comprises the steps of mixing calcium carbonate, zirconium oxide and vanadium pentoxide according to the molar ratio of 1: (1-x) : x to obtain a mixture, wherein 0<x<=0.4; conducting dry ball-milling on the mixture, conducting even mixing, conducting calcination at 1400-1700 DEG C, and conducting ball milling again to obtain powder after cooling, so that the vanadium-doped calcium zirconate inorganic pigment is obtained. The prepared vanadium-doped calcium zirconate inorganic pigment has high infrared reflection performance and can effectively reflect the energy of sunlight; meanwhile, through vanadium doping, the color generation performance of calcium zirconate can be improved, the pigment appears yellow, and the problem of poor contamination resistance is effectively solved. Production equipment mainly includes a ball mill and a firing electric furnace, equipment investment is low, the preparing process is simple, operation is easy, and therefore the preparing method is suitable for large-scale industrial production.

Description

【Technical field】 [0001] The invention relates to the field of preparation of reflective heat-insulating pigments, in particular to a vanadium-doped calcium zirconate inorganic pigment and a preparation method thereof. 【Background technique】 [0002] With the expansion of city size, the "heat island effect" has attracted people's attention. White-coated buildings, automobiles, ships, etc. can effectively reflect the energy of sunlight, but the white coating is not resistant to dirt, and the dirt is very conspicuous, and it cannot meet people's aesthetic requirements. At present, a small amount of infrared reflective pigments have been developed, such as U.S. Patents US6468647, US6521038, US7455904, and US6468647, which report pigments containing transition metal elements or rare earth elements, but these pigments have many defects, such as toxic metal elements exceeding the standard, reflective properties Not good enough, the preparation process is complicated, etc. 【Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/06
CPCC09C1/02C01P2002/34C01P2006/62C01P2006/63C01P2006/64C01P2006/65C09C3/06
Inventor 张营堂马飞闫欠
Owner SHAANXI UNIV OF TECH
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