Method for preparing microwave-assisted non ball milling rare-earth superfine powder

An ultra-fine powder, microwave-assisted technology, used in chemical instruments and methods, luminescent materials, etc., can solve problems such as small particle size, and achieve the effect of reducing sintering problems, reducing workload, and having great potential for industrialization.

Active Publication Date: 2011-02-23
广东炜林纳新材料科技股份有限公司
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rare earth red nano phosphor powder prepared by this patent has high purity, good uniformity, small particle size, and the particle size is between 10 and 30nm, but the method of this patent belongs to the gel method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing microwave-assisted non ball milling rare-earth superfine powder
  • Method for preparing microwave-assisted non ball milling rare-earth superfine powder
  • Method for preparing microwave-assisted non ball milling rare-earth superfine powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] According to chemical formula Y 2 o 3 :Eu x The molar ratio in (x=0.1) takes Y(NO 3 ) 3 and Eu(NO 3 ) 3 , add water to dissolve. In the process of stirring, add citric acid with twice the molar weight of the total metal ions, and stir until a homogeneous liquid. Adjust the pH to alkaline (no precipitation occurs), then back-adjust to pH 5 with acid, and stir evenly. Transfer the mixed liquid to a microwave system, irradiate for 10 minutes under microwave 480W, and keep the obtained powder at 400°C for 2h, and then keep warm at 600 and 800°C for 1h each to obtain rare earth ultrafine powder Y 2 o 3 :Eu.

Embodiment 2

[0033] According to chemical formula Y 2 o 3 :Eu x The molar ratio in (x=0.1) takes Y(NO 3 ) 3 and Eu(NO 3 ) 3 , add water to dissolve. During the stirring process, add citric acid with 2. times the molar weight of the total metal ions, and stir until a homogeneous liquid. Adjust the pH to alkaline (no precipitation occurs), then back-adjust to pH 6 with acid, and stir evenly. Transfer the mixed liquid to a microwave system, irradiate for 10 minutes under microwave 480W, and keep the obtained powder at 400°C for 1h, and then keep it at 800°C for 2h to obtain rare earth ultrafine powder Y 2 o 3 :Eu.

Embodiment 3

[0035] According to chemical formula Y 2 o3 :Eu x The molar ratio in (x=0.15) takes YCl 3 and EuCl 3 , add water to dissolve. In the process of stirring, add EDTA complexing agent with 2.5 times the molar weight of total metal ions, and stir until a homogeneous liquid. Adjust the pH to alkaline (no precipitation occurs), then back-adjust to pH 7 with acid, and stir evenly. Transfer the mixed solution to a microwave system, irradiate for 15 minutes under microwave 320W, and keep the obtained powder at 400°C for 2h, and at 600°C and 800°C for 1h each to obtain rare earth ultrafine powder Y 2 o 3 :Eu.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing microwave-assisted non ball milling rare-earth superfine powder. A rare-earth compound is used as a raw material; ethylene diamine tetraacetic acid (EDTA), citric acid and the like are used as complexing agents; and the Y2O3: Eu and Y2O3: Er, Yb rare-earth superfine powder with small size and uniform distribution can be obtained by simple control of microwave, pH and heat insulation mode without any milling means. The preparation method is quick, time-saving, energy-saving, simple in equipment and safe and controllable to operate; an auxiliary dispersant does not need adding in the process, so the cost is saved and pollution is reduced; because milling is not needed, the damage to the crystal structure of the material is avoided, and the workload is relieved; and the obtained product has low hardness, small granule size (less than 100 nanometers) and uniform distribution.

Description

technical field [0001] The invention relates to a method for preparing rare earth inorganic functional materials; more specifically, the invention relates to a method for preparing uniformly distributed ultrafine powder without a grinding process. technical background [0002] With the progress of modern cutting-edge technology and the development of new material industry, many products are developing towards miniaturization and miniaturization. This requires the material to have the characteristics of high purity, fine particles (<2μm), and narrow distribution. Rare earth ultrafine powder functional materials are developing rapidly in my country and are widely used in optoelectronic devices, magnetic materials, ceramic powder materials and other fields. See "Ultrafine Powder Application and Classification" by Wang Jinzhao, Tian Changan, Zhao Difang, etc., China Non-Metallic Mineral Industry Guide, 2009, 2: 46-49. [0003] At present, the high-temperature solid-phase me...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 郑德冯嘉春贺彬艳陈俊钱玉英刘小梅
Owner 广东炜林纳新材料科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap