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Blue ceramic pigment with high sunlight reflectance ratio and preparation method thereof

A technology of ceramic pigments and solar light, applied in the direction of fibrous fillers, etc., can solve the problems of environmental pollution, expensive raw materials, high energy consumption, etc., and achieve the effects of economical preparation cost, high solar reflectance, and simple preparation process

Inactive Publication Date: 2017-10-10
FUJIAN CONSTR ENG GRP BUILDING MATERIAL SCI & TECH DEV
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Problems solved by technology

Currently used to prepare Zn x co 1-x Al 2 o 4 The typical methods of type pigments are: combustion synthesis method, co-precipitation method, polymer precursor method (Pechini method), hot sol method and spray pyrolysis method; Long-time immersion, expensive raw materials, etc., have brought about high energy consumption and environmental pollution, which is contrary to the original intention of preparing pigments with solar reflectance
[0004] In view of the current problems of cobalt-based blue pigments such as high price, certain toxicity, and poor reflectivity, it is an urgent need for professionals to develop blue pigments with low cost, low cobalt doping, and high solar reflectance. The problem

Method used

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  • Blue ceramic pigment with high sunlight reflectance ratio and preparation method thereof
  • Blue ceramic pigment with high sunlight reflectance ratio and preparation method thereof

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preparation example Construction

[0018] A kind of preparation method of the blue ceramic pigment with high sunlight reflectance of the present invention, this preparation method specifically comprises following operation steps:

[0019] Step (1), preparation of raw material mixed solution: take zinc nitrate tetrahydrate, cobalt nitrate hexahydrate, aluminum nitrate nonahydrate, glycine, respectively adopt deionized water to dissolve into saturated solutions and mix each saturated solution with urea to control nitric acid tetrahydrate The molar ratio of zinc, cobalt nitrate hexahydrate, aluminum nitrate nonahydrate, glycine and urea is 81:9:180:100:675; stir at 80°C for 30-40 minutes to obtain a raw material mixture;

[0020] Step (2), product synthesis: heating the obtained raw material mixture to above 300°C, the system undergoes a self-propagating combustion reaction, and after the reaction is completed, naturally cool to room temperature to obtain the crude product;

[0021] Step (3), product purification:...

Embodiment 1

[0025] Weigh each substance according to the following mass and make corresponding saturated solution:

[0026] 235.3g Zn(NO 3 ) 2 4H 2 O, dissolved in 421g deionized water;

[0027] 29.1g Co(NO 3 ) 2 ·6H 2 O, dissolved in 33.5g deionized water;

[0028] 750.3g Al(NO 3 ) 3 9H 2 O, dissolved in 963.7g deionized water;

[0029] Glycine 84.1g, dissolved in 336.3g deionized water;

[0030] The prepared above saturated solution and 450.5 g of urea were placed in a 2.5 liter mixed glass vessel, and stirred at 300 rpm for 30 minutes at 80°C to obtain a raw material mixture;

[0031] The obtained raw material mixture is heated. During the heating process, as the temperature rises, the water in the raw material mixture volatilizes, and the viscosity of the system increases. When the raw material mixture is heated to 290°C, the raw material mixture is ignited and a self-propagating combustion reaction occurs, during which a large number of reactions are accompanied. Heat and...

Embodiment 2

[0034] The product prepared in Example 1 is subjected to X-ray diffraction to obtain the XRD spectrum of the product, as figure 1 shown; will figure 1 and ZnAl 2 o 4 Compared with the standard spectrum 01-070-8181, it is found that the product has crystal ZnAl 2 o 4 of all diffraction peaks, therefore, the product has ZnAl 2 o 4 (01-070-8181) in the spinolite crystal form; and due to figure 1 There are only diffraction peaks of zinc aluminate and no other miscellaneous peaks, indicating that Co has been well doped into ZnAl 2 o 4 In the crystal, the molecular composition of the product is Zn 0.9 co 0.1 Al 2 o 4 .

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Abstract

The invention provides a blue ceramic pigment with high sunlight reflectance ratio. A crystal structure thereof is of spinel shape. The blue ceramic pigment has a chemical formula as follows: Zn0.9Co0.1Al2O4. The invention also discloses a preparation method for the blue ceramic pigment. The method comprises the following steps: firstly, taking zinc nitrate hydrate, cobalt nitrate hexahydrate, aluminum nitrate nonahydrate and glycine and preparing a raw material mixed solution; heating the raw material mixed solution to above 300 DEG C and performing self-propagating combustion reaction in the system; after the reaction is ended, naturally cooling to room temperature, thereby acquiring a crude product; grinding the crude product, washing with distilled water and drying, thereby acquiring the end product, namely, the blue ceramic pigment. The blue ceramic pigment prepared according to the invention is low in cost and has high sunlight reflectance ratio and low cobalt content. Besides, the preparation method is simple in preparation process, is easy in operation and has convenience.

Description

【Technical field】 [0001] The invention belongs to the technical field of inorganic metal oxide pigments, and in particular relates to a blue ceramic pigment with high solar reflectance and a preparation method thereof. 【Background technique】 [0002] With the depletion of energy and the increasing demand, its use cost continues to rise, saving energy and improving utilization efficiency have become important means to promote the development of new technologies. The widely used near-infrared reflective pigments are used in reflective heat-insulating coatings. When the coated substrate is exposed to sunlight, the pigments in the coating reflect solar light waves, reducing the accumulation of electromagnetic waves on the irradiated surface and the conversion of heat energy. Thereby reducing the accumulation of heat, which ultimately leads to the reduction of cooling system load and achieves the purpose of energy saving. If the roof of a building is decorated with a paint conta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00
CPCC09C1/0009
Inventor 沈航王夏郑敏升林顺官黄春文王剑锋
Owner FUJIAN CONSTR ENG GRP BUILDING MATERIAL SCI & TECH DEV
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