阅读说明：本技术 一种环保无毒的稀土黄色颜料及其制备方法 (Environment-friendly nontoxic rare earth yellow pigment and preparation method thereof ) 是由 解舒博 池建义 李本龙 王文村 白云龙 白宇琦 高乐乐 张耀 于 2020-05-06 设计创作，主要内容包括：本发明涉及一种环保无毒的稀土黄色颜料及其制备方法,所述稀土黄色颜料通过采用稀土氧化物、氧化锌、氧化铋、氧化铝和矿化剂为原料并进行适当重量配比,不使用有毒害作用的偏钒酸铵和五氧化二钒,通过稀土元素的掺杂,采用固相合成法制备得到的稀土黄色颜料,环保无毒,且颜料的粒度细,显色能力好,耐酸、耐碱、耐温性和耐候性较好,在涂料、塑料、建筑等行业具有广泛的应用前景。本发明采用的方法为固相合成法,制备工艺简单,操作简便易实行,条件易控制,对环境和操作人员没有任何危害,在大规模生产的过程中对设备的要求较低,容易实现工业化生产。(The invention relates to an environment-friendly nontoxic rare earth yellow pigment and a preparation method thereof, the rare earth yellow pigment is prepared by adopting rare earth oxide, zinc oxide, bismuth oxide, aluminum oxide and mineralizer as raw materials and carrying out proper weight proportion, ammonium metavanadate and vanadium pentoxide with toxic action are not used, and the rare earth yellow pigment is prepared by adopting a solid phase synthesis method through doping of rare earth elements, is environment-friendly and nontoxic, has fine granularity, good color development capability, better acid resistance, alkali resistance, temperature resistance and weather resistance, and has wide application prospect in the industries of coatings, plastics, buildings and the like. The method adopted by the invention is a solid-phase synthesis method, has simple preparation process, simple and convenient operation, easy control of conditions, no harm to environment and operators, low requirement on equipment in the process of large-scale production and easy realization of industrial production.)

1. The environment-friendly nontoxic rare earth yellow pigment is characterized by comprising the following raw material components:

20-35 parts of rare earth oxide;

15-30 parts of zinc oxide;

15-25 parts of bismuth oxide;

10-20 parts of alumina;

0.1-1 weight part of mineralizer.

2. The rare earth yellow pigment of claim 1, wherein the rare earth oxide is one or more of yttrium oxide, lanthanum oxide, cerium oxide and neodymium oxide.

3. The rare earth yellow pigment of claim 1, wherein the mineralizer is one or more of barium fluoride, magnesium fluoride, calcium chloride, magnesium chloride, sodium chloride and calcium carbonate.

4. The method of preparing a rare earth yellow pigment of claim 1, comprising the steps of:

(1) taking the raw material components according to the weight parts, fully grinding and uniformly mixing for later use;

(2) calcining the ground material obtained in the step (1) to obtain a yellow pigment primary product;

(3) and (3) grinding the yellow pigment primary product obtained in the step (2), and washing and drying to obtain the rare earth yellow pigment.

5. The method according to claim 4, wherein in the step (1), the milling is a ball mill.

6. The method as claimed in claim 4, wherein in step (1), the particle size of the ground material is 300-500 mesh.

7. The method as claimed in claim 4, wherein the calcination is carried out at a temperature of 700 ℃ to 1200 ℃ for a time of 30 to 180min in step (2).

8. The method according to claim 4, wherein in the step (3), the washing with deionized water is performed, and then the washing with ethanol is performed.

9. The production method according to claim 4, wherein in the step (3), the drying is vacuum drying.

10. The method according to claim 9, wherein the drying is carried out at a temperature of 80 to 100 ℃ for 1 to 4 hours.

Technical Field

The invention relates to the technical field of pigments, in particular to an environment-friendly nontoxic rare earth yellow pigment and a preparation method thereof.

Background

Bismuth vanadate (BiVO) as an important inorganic composite oxide pigment₄) The yellow pigment has the characteristics of strong weather resistance, environmental protection, no toxicity and the like, and is expected to replace the traditional yellow pigments containing toxic heavy metals of lead, chromium and cadmium, such as lead-cadmium yellow, zinc-chromium yellow and the like. BiVO exhibiting green phase₄The yellow pigment has the characteristics of brightness, vividness, high color and strong covering power, the color generation effect of the yellow pigment is close to that of a high-performance yellow organic pigment with the same color, and the yellow pigment is favored by multiple industries.

BiVO reported in the prior literature₄The preparation method of the pigment comprises a coprecipitation method, a hydrothermal method, a molten salt method, a solvothermal method, a spray pyrolysis method and a solid phase method. Among them, the solid phase method and the coprecipitation method are most common.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides an environment-friendly and nontoxic rare earth yellow pigment and a preparation method thereof. According to the invention, ammonium metavanadate and vanadium pentoxide with toxic effects are not used, and the environment-friendly and non-toxic rare earth yellow pigment is prepared by doping rare earth elements, has the advantages of fine granularity, good color development capability, good acid resistance, alkali resistance, temperature resistance and weather resistance, and has wide application prospects in the industries of coatings, plastics, buildings and the like. The invention uses the solid-phase synthesis method, has simple preparation process, simple and easy operation, easy control of conditions, no harm to environment and operators, low requirement on equipment in the process of large-scale production and easy realization of industrial production.

The technical scheme adopted by the invention is as follows:

an environment-friendly nontoxic rare earth yellow pigment comprises the following raw material components:

20-35 parts of rare earth oxide;

15-30 parts of zinc oxide;

15-25 parts of bismuth oxide;

10-20 parts of alumina;

0.1-1 weight part of mineralizer.

The rare earth oxide is one or a mixture of more of yttrium oxide, lanthanum oxide, cerium oxide and neodymium oxide.

The mineralizer is one or a mixture of more of barium fluoride, magnesium fluoride, calcium chloride, magnesium chloride, sodium chloride and calcium carbonate.

The preparation method of the rare earth yellow pigment comprises the following steps:

(1) taking the raw material components according to the weight parts, fully grinding and uniformly mixing for later use;

(2) calcining the ground material obtained in the step (1) to obtain a yellow pigment primary product;

(3) and (3) grinding the yellow pigment primary product obtained in the step (2), and washing and drying to obtain the rare earth yellow pigment.

In the step (1), the grinding is ball milling.

In the step (1), the particle size of the ground material is 300-500 meshes.

In the step (2), the calcination temperature is 700-1200 ℃, and the calcination time is 30-180 min.

In the step (3), washing is carried out by using deionized water firstly, and then washing is carried out by using ethanol.

In the step (3), the drying is vacuum drying.

The drying temperature is 80-100 ℃, and the drying time is 1-4 h.

The invention has the beneficial effects that:

the environment-friendly nontoxic rare earth yellow pigment is prepared by adopting rare earth oxide, zinc oxide, bismuth oxide, aluminum oxide and mineralizer as raw materials according to a proper weight ratio without using ammonium metavanadate and vanadium pentoxide with toxic action and adopting a solid phase synthesis method through doping of rare earth elements, is environment-friendly and nontoxic, has fine granularity, good color development capability, acid resistance, alkali resistance, temperature resistance and weather resistance, and has wide application prospects in the industries of coatings, plastics, buildings and the like. The method adopted by the invention is a solid-phase synthesis method, has simple preparation process, simple and convenient operation, easy control of conditions, no harm to environment and operators, low requirement on equipment in the process of large-scale production and easy realization of industrial production.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an XRD pattern of a rare earth yellow pigment prepared by the method of example 1 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.