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A kind of rare earth green pigment without cobalt and chromium, its preparation method and application

A green pigment and rare earth technology, applied in the field of pigments, can solve the problems of complex preparation methods, poor acid and alkali resistance, etc., and achieve the effects of easy control of reaction conditions, low equipment requirements, and easy industrialization promotion.

Active Publication Date: 2022-05-13
BAOTOU RARE EARTH RES & DEV CENT CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, green inorganic pigments that do not contain heavy metals have the disadvantages of complicated preparation methods and poor acid and alkali resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of rare-earth green pigment not containing cobalt, chromium, comprises the raw material preparation of following weight:

[0034] scandium oxide 40g;

[0035] Copper oxide 25g;

[0036] Barium carbonate 40g;

[0037] Calcium carbonate 0.3g.

[0038] The preparation method of the above-mentioned rare earth green pigment not containing cobalt and chromium comprises the following steps:

[0039] (1) Weigh each raw material according to the weight ratio, place it in a ball mill jar, add zirconia balls 3 times the weight of the raw material, and mix evenly after ball milling for 4 hours to obtain a mixed raw material powder. The particle size of the mixed raw material powder is 400 mesh;

[0040] (2) Calcining the mixed raw material powder obtained in step (1) at 1000° C. for 3 hours to obtain a prefabricated green pigment;

[0041](3) Grinding the prefabricated green pigment obtained in step (2), first washing with deionized water, then washing with ethanol, filt...

Embodiment 2

[0043] A kind of rare-earth green pigment not containing cobalt, chromium, comprises the raw material preparation of following weight:

[0044] scandium oxide 40g;

[0045] Zinc oxide 3g;

[0046] Copper oxide 25g;

[0047] Barium carbonate 40g;

[0048] The preparation method of the above-mentioned rare earth green pigment not containing cobalt and chromium is the same as that of Example 1.

Embodiment 3

[0050] A kind of rare-earth green pigment not containing cobalt, chromium, comprises the raw material preparation of following weight:

[0051] Yttrium oxide 40g;

[0052] Zinc oxide 5g;

[0053] Copper oxide 20g;

[0054] Barium carbonate 25g;

[0055] Barium fluoride 0.3g.

[0056] The preparation method of the above-mentioned rare earth green pigment not containing cobalt and chromium comprises the following steps:

[0057] (1) Weigh each raw material according to the weight ratio, place it in a ball mill jar, add zirconia balls 3 times the weight of the raw material, and mix evenly after ball milling for 4 hours to obtain a mixed raw material powder. The particle size of the mixed raw material powder is 400 mesh;

[0058] (2) Calcining the mixed raw material powder obtained in step (1) at 700° C. for 1 hour to obtain a prefabricated green pigment;

[0059] (3) Grinding the prefabricated green pigment obtained in step (2), first washing with deionized water, then washi...

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Abstract

The invention provides a rare earth green pigment without cobalt and chromium, its preparation method and application. The rare earth green pigment is obtained by a solid phase synthesis method, the method is simple, and the reaction is easy to control; the obtained rare earth green pigment is made of rare earth oxides. Dopants, rare earth oxides can enter the lattice of other compounds, change the lattice structure or lattice parameters of other compounds to make the pigment appear bright and bright green, and play a color changing, color stabilizing and color aiding role in the pigment The role, thereby avoiding the use of traditional toxic coloring agent cobalt, chromium, environmental protection and non-toxic. The invention can obtain a series of green pigments from grass green to dark green with high hue saturation, good color rendering ability, high transparency and fine particle size by adjusting the ratio of each raw material. The green pigment provided by the invention has good acid resistance, alkali resistance, light resistance and weather resistance, can replace existing inorganic green pigments containing heavy metals, and can be used in fields such as ceramics and plastics.

Description

technical field [0001] The invention belongs to the technical field of pigments, and in particular relates to a cobalt- and chromium-free rare-earth green pigment, a preparation method and application thereof. Background technique [0002] At present, inorganic pigments are widely used in industry, especially in coatings, plastics and ceramics. The current research status of green pigments is formulated with chromium oxide as a chromogenic agent, adding natural mineral raw materials and some oxides, such as chromium cobalt green (CoCr 2 o 4 ), green chromite (Cr 2 o 3 ), garnet (Ca 3 Cr 2 [SiO 4 ] 3 ), spinel ((Co,Zn)(Cr,Al) 2 o 4 ) and rare earth chromate RECrO 3 (RE=Y, Nd and Sm). However, most green pigments contain heavy metal ions such as cobalt and chromium, which are not only harmful to human health, but also cause environmental pollution. Even a small amount of products seeping into the ground will cause great harm to drinking water. The dust can cause ir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/00C09D7/61C08K3/18C08K3/22C08K3/26C08K3/013C08K3/16
CPCC09C1/0009C09D7/61C08K3/18C08K3/22C08K3/26C08K3/00C08K3/16C08K2003/221C08K2003/2248C08K2003/265C08K2201/014C08K2003/2296C08K2003/166C08K2003/162
Inventor 解舒博王文村李本龙池建义高乐乐
Owner BAOTOU RARE EARTH RES & DEV CENT CHINESE ACADEMY OF SCI
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