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Method for preparing spinel structure cobalt aluminate pigment by solution combustion method

A technology of spinel structure and solution combustion, applied in chemical instruments and methods, preparation of alkali metal aluminate/alumina/aluminum hydroxide, cobalt compounds, etc., can solve complicated operation, high cost, and limited use of high-quality pigments range and other issues, to achieve the effect of wide application and high yield

Inactive Publication Date: 2020-01-07
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet method is easier to control the shape, particle size and chemical composition of the product than the dry method, but the cost is high and the operation is complicated, which is not conducive to large-scale production
In addition, the gas phase method can also prepare nano-scale cobalt blue, but it is difficult to produce on a large scale because of the high cost and complicated operation as the wet method.
[0005] Although the performance of cobalt blue is outstanding, the price of cobalt blue is high because of the cobalt contained in the components, which seriously limits the scope of use of this high-quality pigment

Method used

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  • Method for preparing spinel structure cobalt aluminate pigment by solution combustion method
  • Method for preparing spinel structure cobalt aluminate pigment by solution combustion method
  • Method for preparing spinel structure cobalt aluminate pigment by solution combustion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Spinel Al 2 o 3 preparation of

[0035] Weigh 0.7503g Al(NO 3 )·9H 2 O (2mmol) and 0.1501g C 2 h 5 NO 2 (glycine 2mmol) in a 100mL quartz beaker, then add 10mL distilled water and stir thoroughly to dissolve it completely. Adjust the temperature of the flat furnace to 400°C, place the prepared solution on the flat furnace, and burn the solution after evaporation and concentration (about 5 minutes in the whole process) to generate a gray foamy precursor. Put the precursor into a crucible, heat up to 900°C in a muffle furnace and calcinate for 4 hours, then cool to room temperature, the product is a white powder, see the physical photo figure 1 .

[0036] The scanning electron micrograph of the product of the present embodiment is as figure 2 As shown, the XRD diffraction pattern and the standard spectrum line contrast figure are as follows image 3 As shown, the X-ray diffraction pattern and the spinel structure of γ-Al 2 o 3 The peak position and...

Embodiment 2

[0039] Example 2: Spinel Co 0.1 Al 2 o 3.1 preparation of

[0040] Weigh 0.0291g Co(NO 3 ) 2 ·6H 2 O (0.1mmol), 0.7503g Al (NO 3 )·9H 2 O (2mmol) and 0.1501g C 2 h 5 NO 2 (glycine 2mmol) in a 100mL quartz beaker, then add 10mL distilled water and stir thoroughly to dissolve it completely. Adjust the temperature of the flat furnace to 400°C, place the prepared solution on the flat furnace, and burn the solution after evaporation and concentration (about 5 minutes in the whole process) to generate a gray foamy precursor. The precursor was put into a crucible and heated to 900°C in a muffle furnace for calcination for 4 hours, then cooled to room temperature, and the product was a light blue powder.

[0041] After the X-ray diffraction pattern of the product of this embodiment is indexed, the unit cell parameters are consistent with the spinel structure, and there is no diffraction peak of the impurity phase. The product was determined to be in the spinel phase. The ...

Embodiment 3

[0044] Example 3: Spinel Co 0.2 Al 2 o 3.2 preparation of

[0045] Weigh 0.0582g Co(NO 3 ) 2 ·6H 2 O (0.2mmol), 0.7503g Al (NO 3 )·9H 2 O (2mmol) and 0.1501g C 2 h 5 NO 2 (glycine 2mmol) in a 100mL quartz beaker, then add 10mL distilled water and stir thoroughly to dissolve it completely. Adjust the temperature of the flat furnace to 400°C, place the prepared solution on the flat furnace, and burn the solution after evaporation and concentration (about 5 minutes in the whole process) to generate a gray foamy precursor. The precursor was put into a crucible and heated to 900°C in a muffle furnace for calcination for 4 hours, then cooled to room temperature, and the product was a light blue powder. real photo see figure 1 (Note: Since the Patent Office does not support color drawings, the figure 1 In the photos shown, each product shows different degrees of gray, and the actual removal of Al 2 o 3 In addition to being white, the rest of the products are blue in va...

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Abstract

The invention discloses a method for preparing a spinel structure cobalt aluminate pigment by a solution combustion method, and belongs to the technical field of inorganic synthesis. A solution combustion method is used, metal nitrate is used as a raw material, organic amine used as a fuel and water are prepared to a solution, the reaction temperature and the raw material proportion are controlledto selectively synthesize CoxAl2O3 + x (x = 0-1) series spinel structure cobalt blue powder pigments with different element proportions, and the preparation requirements of high-purity and high-yieldcobalt blue nano powder are met. The method provides a new green and high-yield reaction route for the cobalt blue pigment, and has the advantages of low raw material cost, high yield, low energy consumption, no pollution, selective synthesis and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic synthesis. Especially related to green, high-yield and controllable preparation of Co with different Co content x Al 2 o 3+x (x=0-1) Solution combustion method of cobalt blue pigment. [0002] technical background [0003] Spinel aluminate is an important industrial material, which is used as ceramics, pigments, optical materials, nanomaterials, catalysts, etc. Of which cobalt blue CoAl 2 o 4 It is a non-toxic and environmentally friendly inorganic pigment with excellent hiding power, coloring power and dispersibility. With another commonly used blue inorganic pigment ultramarine blue Na 6 Al 4 Si 6 S 4 o 20 In contrast, because cobalt blue has the characteristics of spinel structure, it does not precipitate free cobalt metal ions, and has stable chemical properties, high temperature resistance, acid and alkali resistance. It is widely used in high-temperature coatings, engineering pl...

Claims

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Application Information

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IPC IPC(8): C01F7/04C01G51/00C09C1/40
CPCC01F7/046C01G51/00C01P2002/72C01P2004/03C01P2006/60C09C1/40
Inventor 陈岩张琪
Owner JILIN UNIV
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