Preparation method of gadolinium oxysulfide powder

A technology of gadolinium oxysulfide and powder is applied in the field of preparation of infrared materials, which can solve the problems of long reaction time, uneven particle size distribution of powder, agglomeration and the like, and achieve the effect of avoiding the discharge of harmful by-products.

Pending Publication Date: 2022-03-11
安徽光智科技有限公司
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has defects such as high reaction temperature, long reaction time, uneven powder particle size distribution, more impurities, harsh reaction conditions, and easy generation of more pollutants and chemical waste.
The vulcanization method can make rare earth oxides or specific precursors in a certain S steam or H 2 S, CS 2 Vulcanize into sulfur oxides under the same atmosphere. If the s...

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
  • Preparation method of gadolinium oxysulfide powder

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] Aiming at the problem of environmental pollution in the preparation of gadolinium oxysulfide powder by vulcanization method in the prior art, this application provides a preparation method for preparing gadolinium oxysulfide powder, the preparation method is green and environmentally friendly, and the gadolinium oxysulfide powder has The particle size is small. The preparation process of the application gadolinium oxysulfide powder is as follows figure 1 As shown, the embodiment of the present invention specifically discloses a preparation method of gadolinium oxysulfide powder, comprising the following steps:

[0023] A) will Gd 2 o 3 , activator, flux and sulfur are mixed in a stoichiometric ratio to obtain a mixed powder;

[0024] B) ball milling the mixed powder and the mineralizer to obtain a precursor powder;

[0025] C) Calcining the precursor powder to obtain a primary powder, pickling the primary powder, and drying in a vacuum to obtain a gadolinium oxysulf...

Embodiment 1

[0033] A preparation method of ideal matrix material ultrafine gadolinium oxysulfide powder, the Gd 2 o 2 The preparation method of S powder comprises the steps:

[0034] (1) 181.3g Gd 2 o 3 , 15.312g Tb 4 o 7 or 20.428g Pr 6 o 11 One of the flux Na 2 CO 3 , 128.24g S is proportioned according to stoichiometry, and is initially mixed to obtain a mixed powder; the addition of flux is 0.5wt%;

[0035] (2) Add a certain proportion of mineralizers KF and KCl to the mixed powder, the addition amount is 0.5wt%, and add it into the planetary ball mill according to a certain ball-to-material ratio and mix evenly, and the ball-mill ratio is 2:1 to obtain the precursor powder;

[0036] (3) Calcining the obtained precursor powder at 1100°C for 1 h in a reducing atmosphere to obtain a primary powder; the SO produced during the calcination process 2 The gas can be recovered SO by activated carbon dry method 2 ; The reducing atmosphere is N 2 +H 2 Mix in proportion, where N 2...

Embodiment 2

[0040] A preparation method of ideal matrix material ultrafine gadolinium oxysulfide powder, the Gd 2 o 2 The preparation method of S powder comprises the steps:

[0041] (1) 181.3g Gd 2 o 3 , 15.312g Tb 4 o 7 or 20.428g Pr 6 o 11 One of the flux Li 2 CO 3 , 128.24g S is proportioned according to stoichiometry, and is initially mixed to obtain a mixed powder; the addition of flux is 0.5wt%;

[0042] (2) Add a certain proportion of mineralizers KF and KCl to the mixed powder, the addition amount is 0.5wt%, and add it into the planetary ball mill according to a certain ball-to-material ratio and mix evenly, and the ball-mill ratio is 8:1 to obtain the precursor powder;

[0043] (3) Calcining the obtained precursor powder at 1100°C for 1 h in a reducing atmosphere to obtain a primary powder; the SO produced during the calcination process 2 The gas can be recovered SO by activated carbon dry method 2 ; The reducing atmosphere is N 2 +H 2 Mix in proportion, where N 2...

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
Melting pointaaaaaaaaaa
Login to view more

Abstract

The invention provides a preparation method of gadolinium oxysulfide powder, which comprises the following steps: A) mixing Gd2O3, an activating agent, a fluxing agent and sulfur according to a stoichiometric ratio to obtain mixed powder; b) carrying out ball milling on the mixed powder and a mineralizing agent to obtain precursor powder; and C) calcining the precursor powder to obtain primary powder, and performing acid pickling and vacuum drying on the primary powder to obtain the gadolinium oxysulfide powder. The preparation method of the gadolinium oxysulfide powder provided by the invention is green and environment-friendly, and the gadolinium oxysulfide powder with fine and uniform particle size can be prepared.

Description

technical field [0001] The invention relates to the technical field of preparation of infrared materials, in particular to a preparation method of gadolinium oxysulfide powder. Background technique [0002] Rare earth sulfur oxides have a hexagonal crystal structure, that is, space group P3m1, are insoluble in water, and have a chemical formula of RE 2 o 2 S, where RE=Y, La, Gd and Lu, are the hosts of luminescent materials, which are white. Gd 2 o 2 S, namely GOS, high melting point (2070°C-2200°C), lattice constant Large band gap (4.6eV), high density (7.34g / cm 3 ), wherein the atomic number of Gd is 60, which has high resistance to X-rays, high luminous efficiency, strong oxidation resistance, high light absorption rate and transmission efficiency, and is non-toxic. Due to the existence of anisotropy, there is birefringence on the grain boundary, and it is not easy to prepare transparent ceramics. Phonons have low energy and good physical and chemical stability, s...

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
IPC IPC(8): C01F17/294C01F17/10C09K11/84
CPCC01F17/294C01F17/10C09K11/7701C01P2004/61
Inventor 安宁于金凤
Owner 安徽光智科技有限公司
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