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Plate-type bismuth oxychloride crystal with controllable shape and preparation method thereof

A technology of bismuth oxychloride and crystals, applied in the field of bismuth oxychloride crystals and its preparation, can solve the problems of affecting brightness, restricting applications, irregularities, etc., and achieve enhanced hiding power, high coverage, improved brightness and brilliant light effect of effect

Active Publication Date: 2011-01-05
FUJIAN KUNCAI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All the above-mentioned inventions and the preparation of bismuth oxychloride crystals have a plate-like structure, but their irregular crystal shapes affect their own brightness and limit their application in the field of application.

Method used

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  • Plate-type bismuth oxychloride crystal with controllable shape and preparation method thereof
  • Plate-type bismuth oxychloride crystal with controllable shape and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 250ml of concentrated hydrochloric acid to 12 liters of deionized water. After heating to 73°C, start stirring and maintain the solution at 73°C. After 5 minutes, add 3.8g of oleylamine SV / 12 dropwise and control the speed to 0.3g / min bismuth The salt solution and 0.39g / min 20wt% NaOH solution were sent to the system at the same time. After 30 minutes, 640ml of bismuth nitrate solution was continuously added to control the dropping rate of 0.6g / min of bismuth salt solution and 0.8g / min of 20wt % NaOH solution. After adding the bismuth salt solution, continue to add NaOH to pH 10, and stop heating and stirring. After cooling to room temperature, the solution was allowed to stand and the supernatant was removed after layering. The obtained solid was washed with deionized water to obtain BiOCl crystals. Observed through a microscope, the resulting product exhibited square thin plate crystals with a particle size of 8-15μ. Disperse the prepared crystals in organic sol...

Embodiment 2

[0023] Add 200ml of concentrated hydrochloric acid to 12 liters of deionized water. After heating to 73°C, start stirring and maintain the solution at 73°C. After 5 minutes, add 3.8 g of oleylamine T13 dropwise and control the speed to 0.3g / min bismuth salt solution And 0.39g / min 20wt% NaOH solution were sent to the system at the same time. After 30 minutes, continue to add 620ml bismuth nitrate solution to control the dropping rate of 0.6g / min bismuth salt solution and 0.8g / min 20wt% NaOH The solution, after adding the bismuth salt solution, continue to add NaOH to pH 10, stop heating and stirring, after cooling to room temperature, let the solution stand for stratification, remove the supernatant, and wash the obtained solid with deionized water. BiOCl crystals. Observed through a microscope, the resulting product presents regular octagonal thin plate crystals with a particle size of 8-15μ. Disperse the prepared crystals in organic soluble resin to make pearl paste.

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Abstract

The invention provides a bismuth oxychloride crystal and a preparation method thereof. The bismuth oxychloride crystal is a square and regular octagonal thin-plate bismuth oxychloride crystal with a regular shape. In the preparation process, different selected surfactants are covered on the surface of the bismuth oxychloride seed crystal, so that the bismuth oxychloride crystal can directionally grow in different acidic mediums. The bismuth oxychloride crystal has better brightness, effulgent effect and covering capability, compared with irregular bismuth oxychloride crystal.

Description

Technical areas: [0001] The present invention relates to a bismuth oxychloride crystal and a preparation method thereof. More specifically, the invention relates to regular square and regular octagonal thin plate bismuth oxychloride crystals and their preparation. Background technique: [0002] Pearlescent pigments, called effect pigments, give the objects using them a pearlescent color or pearlescent luster with their layered or flake-like structures. At present, the most common effect pigments are mica and glass coated with metal oxides. Synthetic inorganic effect pigments include pearlescent pigments containing basic lead acetate and lead carbonate crystals composed of hexagonal platelets, etc., because they contain toxic substances. Lead, therefore, is restricted in more and more countries when physiological aspects and environmental protection interests must be taken into consideration. [0003] Due to its high gloss, BiOCl is used as a substitute for green non-toxic i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B11/00C09D17/00C08L101/00C08K3/24
Inventor 袁占辉王莉玮谢秉坤
Owner FUJIAN KUNCAI MATERIAL TECH
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