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Preparation of a near-infrared reflective phosphate color pigment

A near-infrared and color technology, applied in the field of ion-doped and composite high near-infrared reflection pigment preparation, can solve the problem of less research on coloration of aluminum phosphate pigments

Active Publication Date: 2021-11-19
浙大宁波理工学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have found that white phosphates have high reflectivity, such as NaZnPO 4 and KZnPO 4 The high near-infrared reflectivity has been confirmed, but there are few studies on the colorization of aluminum phosphate pigments

Method used

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  • Preparation of a near-infrared reflective phosphate color pigment
  • Preparation of a near-infrared reflective phosphate color pigment
  • Preparation of a near-infrared reflective phosphate color pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019]Measure 1ml phosphoric acid (purity is 85%), weigh 7.5g aluminum nitrate nonahydrate and 3.84g citric acid, all dissolve in 20ml deionized water. The above system was placed in an experimental microwave oven and stirred at a temperature of 80°C for 90 minutes to form a precursor. The precursor was transferred to a crucible, put into a muffle furnace and calcined at 1000 °C for 2 hours, and finally the product AlPO was obtained 4 .

Embodiment 2

[0021] Measure 0.02mol phosphoric acid (purity is 85%), according to molecular formula Co 0.05 al 0.95 PO 4 , Weigh cobalt nitrate and aluminum nitrate, citric acid is weighed with the equimolar amount of phosphoric acid, all dissolve in 20ml deionized water. The above system was placed in an experimental microwave oven and stirred at a temperature of 80°C for 90 minutes to form a precursor. The precursor was transferred to a crucible, put into a muffle furnace and calcined at 1000 °C for 2 h, and finally the product Co 0.05 al 0.95 PO 4 .

Embodiment 3

[0023] Measure 0.02mol phosphoric acid (purity is 85%), according to molecular formula Co 0.2 al 0.8 PO 4 , Weigh cobalt nitrate and aluminum nitrate, citric acid is weighed with the equimolar amount of phosphoric acid, all dissolve in 20ml deionized water. The above system was placed in an experimental microwave oven and stirred at a temperature of 80°C for 90 minutes to form a precursor. The precursor was transferred to a crucible, put into a muffle furnace and calcined at 1000 °C for 2 h, and finally the product Co 0.1 al 0.9 PO 4 .

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Abstract

A near-infrared reflective pigment and a preparation method thereof, which are characterized in that a porous heat-insulating pigment with high near-infrared reflection in color is prepared by adopting a combined process of microwave-gel method-combustion method. Pigment chemical general formula provided by the invention is M x al 1‑x PO 4 (M is a non-ferrous metal ion, x=0‑0.2). The present invention uses AlPO 4 Doped with non-ferrous metal ions as the matrix, it not only ensures the high heat insulation performance of the pigment, but also enriches its color.

Description

technical field [0001] The invention belongs to technical field, relate to a kind of preparation method of inorganic pigment, relate in particular to aluminum phosphate (AlPO 4 ) as a substrate, ion-doped and compounded high near-infrared reflection (NIR) pigment preparation method. Background technique [0002] Phosphate has excellent anti-corrosion and flame-retardant properties, and is non-toxic and low-cost. Therefore, in recent years, phosphate pigments have been widely used in the fields of building materials, chemicals, and refractory materials. In fact, the advantages of phosphate in near-infrared reflection are also obvious. The near-infrared reflectance of white phosphate is 95%. Co-precipitation is commonly used in China to prepare phosphate materials. Among them, Su Dagen et al. prepared white phosphate by coprecipitation. NaZPO 4 Porous material, under the optimal process, the reflectivity of the product in the near-infrared band is as high as 95.2%, which is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40
CPCC09C1/40
Inventor 张艳辉尚龙安许冠杰
Owner 浙大宁波理工学院