White powder and method for production thereof

一种制造方法、粉体的技术，应用在白色粉体及其制造领域，能够解决粉体亮度不充分等问题，达到亮度提高的效果

Inactive Publication Date: 2006-05-24
NITTETABU MINING CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the whitening technology described in the above-mentioned Patent Document 1 does not have sufficient brightness of the obtained powder, so a whitening technology for obtaining a powder with higher brightness is desired.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]

[0046] In 0.34kg titanium tetrachloride solution reagent (Kanto Chemical), mix 2.09kg deionized water, 0.56kg ammonia water reagent (Kanto Chemical), 2.16kg hydrogen peroxide water reagent (Kanto Chemical), to obtain yellow transparent titanium peroxide acid solution.

[0047] Next, dissolve 0.53 kg of boron trioxide reagent (Kanto Chemical), 0.64 kg of potassium chloride reagent (Kanto Chemical), and 0.14 kg of sodium hydroxide reagent (Kanto Chemical) in 30 kg of deionized water, and suspend 3.00 kg of silica coating Lamellar permalloy powder. In addition, the particle size measurement value D of the silica-coated plate-shaped permalloy powder measured by the laser diffraction method 50 The diameter is 17 μm (the refractive index of the powder is measured to be 1.53 using Microtrac X100 manufactured by Nikkiso Co., Ltd.), and the mass magnetization under an applied magnetic field of 79.6 kA / m (1 kOe) is 59 A m / kg (59 emu / g) , brightness L * is 53.

[0048] The...

Embodiment 2-4

[0056]

[0057] In 0.28kg titanium tetrachloride solution reagent (Sumitomo titanium (チタニウム), Ti concentration is 16.5%), mix 1.74kg deionized water, 0.49kg ammonia water reagent (Kanto Chemical), 1.80kg hydrogen peroxide water reagent (Kanto Chemical ), to obtain a yellow transparent peroxotitanic acid solution.

[0058] Next, dissolve 0.44 kg of boron trioxide reagent (Kanto Chemical), 0.53 kg of potassium chloride reagent (Kanto Chemical), 0.11 kg of sodium hydroxide reagent (Kanto Chemical) in 2.5 kg of deionized water, and suspend 1.84 kg of silica Coated platy permalloy powder. In addition, the particle size measurement value D of the silica-coated plate-shaped permalloy powder measured by the laser diffraction method 50 The diameter is 17 μm (the refractive index of the powder is measured to be 1.53 using Microtrac X100 manufactured by Nikkiso Co., Ltd.), and the mass magnetization under an applied magnetic field of 79.6 kA / m (1 kOe) is 56 A m / kg (56 emu / g) , bright...

Embodiment 5-6

[0075]

[0076] In 25g of titanium trichloride solution reagent (Kanto Chemical), mix 51g of ammonia water reagent (Kanto Chemical), 25g of hydrogen peroxide water reagent (Kanto Chemical), to obtain a yellow transparent peroxytitanic acid solution.

[0077] Next, 100 g of spherical iron powder was suspended in 700 g of 0.4 mol / L boric acid-potassium chloride-sodium hydroxide solution. In addition, the particle size measurement value D of the spherical iron powder measured by the laser diffraction method 50The diameter is 3 μm (measured using the Microtrac X100 manufactured by Nikkiso Co., Ltd., using the powder as a reflector), and the mass magnetization under an applied magnetic field of 79.6 kA / m (1 kOe) is 55 A m / kg (55 emu / g) , brightness L * is 58.

[0078] While stirring the suspension at 1000 rpm, the mixed peroxotitanic acid solution was added dropwise at a rate of 1.4 g / min. After completion of dropwise mixing, stirring was continued for 2 hours.

[0079] After...

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Abstract

The invention provides a white powder with high brightness and a manufacturing method thereof. The white powder has a titanium oxide film and a metal silver film in this order on the surface of the matrix particles, and the brightness L* is preferably 75 or more, and the brightness L* of the matrix particles is preferably 70 or less. In addition, the base particle is preferably a magnetic material, and the film thickness of the titanium oxide film is preferably 5 to 500 nm.

Description

technical field [0001] The present invention relates to a white powder, in particular, to a white powder with higher brightness (whiteness) than the existing white powder, which can be used for color ink, color filler for plastic and paper, color toner, spray paint, etc. White powders for various purposes such as color inks for ink printers and methods for producing the same. Background technique [0002] In order to use the powder for various purposes, it is known that the powder is coated with another substance to add a new function. For example, conventional one-component color magnetic toners or color magnetic inks are prepared by providing a colored layer on magnetic base particles such as iron powder. In order to obtain a vivid color image by the single-component system colored magnetic toner or colored magnetic ink, it is necessary to color the magnetic toner and the ink itself into a bright color, but since the magnetic particles as its matrix are usually black, Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/06C09C1/00
CPCC01P2006/62C09C3/063Y10T428/2991C09C3/06
Inventor 中塚胜人岸本章新子贵史小仓慎一星野希宜干场哲朗
Owner NITTETABU MINING CORP
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