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Preparation method of nano spherical ferrosilicon red pigment with high dispersity and high encapsulation rate

A technology with high dispersibility and encapsulation rate, which can be used in chemical instruments and methods, fibrous fillers, dyed polymer organic compounds, etc., and can solve the problems of low encapsulation rate and poor monodispersity of ferrosilicon red

Inactive Publication Date: 2018-05-04
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art such as low encapsulation rate and poor monodispersity of ferrosilicon red, and provide a preparation method of nano-spherical ferrosilicon red material with high dispersibility and high encapsulation rate

Method used

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  • Preparation method of nano spherical ferrosilicon red pigment with high dispersity and high encapsulation rate
  • Preparation method of nano spherical ferrosilicon red pigment with high dispersity and high encapsulation rate

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Embodiment 1

[0025] Dissolve 2.89g of ferric chloride and 3.39g of sodium carbonate in 80ml of deionized water, stir evenly, and pour the solution into a 100ml reaction kettle. Then place it in an oven at 180°C for 6 hours. The reacted solution was suction filtered, washed three times with absolute ethanol and deionized water, and dried to obtain nano-Fe 2 o 3 particles. Take the prepared nano-Fe 2 o 3 Add 0.1g and 0.8g of PVP powder into 200ml of deionized water, stir for 12 hours after ultrasonic dispersion, and then centrifuge to obtain PVP modified Fe 2 o 3 . Weigh 0.1g of PVP modified Fe 2 o 3 Disperse in 160ml of ethanol, add 10ml of ammonia water with a mass fraction of 25% in stirring, to obtain Fe 2 o 3 dispersion solution. Subsequently, 1 ml of tetraethyl orthosilicate was dissolved in ethanol with a volume ratio of 1:4, and Fe was added dropwise at a constant speed of 40 s / ml. 2 o 3 In the dispersion, stir continuously for 16h. Finally, Fe can be obtained by centri...

Embodiment 2

[0029] Dissolve 3.38g of ferric chloride and 4.23g of sodium dihydrogen phosphate in 80ml of deionized water, stir evenly, and pour the solution into a 100ml reaction kettle. Then put it in an oven at 190°C for 8 hours. The reacted solution was suction filtered, washed three times with absolute ethanol and deionized water, and dried to obtain nano-Fe 2 o 3 particles. Take the prepared nano-Fe 2 o 3 Add 0.35g and 2.8g of PVP powder into 200ml deionized water, stir for 16 hours after ultrasonic dispersion, and then centrifuge to obtain PVP modified Fe 2 o 3 . Weigh 0.35g of PVP modified Fe 2 o 3 Be dispersed in the ethanol of 250ml, add 24ml mass fraction in stirring and be the ammoniacal liquor of 25%, obtain Fe 2 o 3 dispersion solution. Subsequently, 3.5 ml of tetraethyl orthosilicate was dissolved in ethanol with a volume ratio of 1:6, and was dropped into Fe at a constant speed of 100 s / ml. 2 o 3 In the dispersion, stir continuously for 20h. Finally, Fe can be...

Embodiment 3

[0032] Dissolve 4.56g of ferric perchlorate and 5.73g of sodium carbonate in 80ml of deionized water, stir evenly, and pour the solution into a 100ml reaction kettle. Then place it in an oven at 200°C for 10 hours. The reacted solution was suction filtered, washed three times with absolute ethanol and deionized water, and dried to obtain nano-Fe 2 o 3 particles. Take the prepared nano-Fe 2 o 3 Powder 0.48g and 3.84g PVP were added to 200ml deionized water, stirred for 24 hours after ultrasonic dispersion, and then centrifuged to obtain PVP modified Fe 2 o 3 . Weigh 0.48g of PVP modified Fe 2 o 3 Disperse in 500ml of ethanol, add 42ml of ammonia water with a mass fraction of 25% in stirring, to obtain Fe 2 o 3 dispersion solution. Subsequently, 6.8 ml of silicon chloride was dissolved in ethanol with a volume ratio of 1:10, and Fe was added dropwise at a constant speed of 120 s / ml. 2 o 3 In the dispersion, stir continuously for 24h. Finally, Fe can be obtained by ...

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Abstract

The invention discloses a preparation method of a nano spherical ferrosilicon red pigment with high dispersity and a high encapsulation rate. Fe2O3 with a particle size of 40nm is prepared by virtue of a hydrothermal method, and PVP (polyvinylpyrrolidone) is used for modifying the Fe2O3. The PVP is adsorbed on the surface of the Fe2O3 to form a layer of macromolecular protection membrane and a steric hindrance layer, so that the repelling force and the particle stability can be improved, and the dispersity is improved. Then the surfaces of the Fe2O3 surface particles are uniformly coated witha layer of SiO2 to form Fe2O3@SiO2 having a core-shell structure by adopting a simple St-ber method. By virtue of high-temperature calcinations, the nano spherical ferrosilicon red pigment with high encapsulation rate and high dispersity can be obtained, the synthesized red pigment is pure in color, uniform in particle size and stable in performance, can be used in various glaze bodies and has higher economic value.

Description

technical field [0001] The invention belongs to the technical field of ceramic pigments, in particular to a method for preparing nano-spherical ferrosilicon red pigments with high dispersion and high encapsulation rate. Background technique [0002] As one of the three primary colors, red has an important influence on the harmony and presentation of colors. Therefore, the demand for red materials in ceramic pigments is huge, and the application prospects are broad. However, there are some problems in the existing ceramic red material system: (1) some red materials contain heavy metals such as lead and cadmium, which endanger the ecological environment and human health during production and use; (2) most ceramic red materials use solid-phase methods Synthesis (Reference: Patent Application No. 200610057529.2), not only the preparation method is energy-intensive and highly polluting; but also for the encapsulation of red material, the solid-phase method cannot guarantee a high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/24C09C3/06C09C3/10
CPCC09C1/0009C09C3/006C09C3/063C09C3/10
Inventor 汪长安陈仕乐魏红康郎莹田传进
Owner JINGDEZHEN CERAMIC INSTITUTE
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