Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nano-scale rare earth oxide-doped powder and preparation method thereof

A rare earth oxide and nano-scale technology, applied in the field of powder metallurgy, can solve the problems of uneven particle size of the second phase, uneven performance at the microscopic level, and affecting the performance of macroscopic materials, achieving high safety, reliability, and high Integrated and continuous operation, promising results

Active Publication Date: 2019-07-09
XI AN JIAOTONG UNIV
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, after in-depth analysis of the current liquid-liquid doping process and the size of the second phase in the alloy, it is found that the existing liquid-liquid doping technology has non-uniform particle size and wide particle size distribution of the second phase in the alloy material. The phenomenon
Due to the different strengthening and toughening effects of the particle size of the second phase, it is inevitable that the performance of the material at the microscopic level will be uneven, which will affect the macroscopic performance of the material.

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
  • Nano-scale rare earth oxide-doped powder and preparation method thereof
  • Nano-scale rare earth oxide-doped powder and preparation method thereof
  • Nano-scale rare earth oxide-doped powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The preparation method of nanoscale rare earth oxide doped powder comprises the following steps:

[0036] (1) Preparation of raw material solution:

[0037] a. Preparation of rare earth nitrate solution:

[0038] Put the rare earth nitrate in the beaker, the rare earth nitrate can be one or more of lanthanum, yttrium, cerium, etc., then add pure water, stir and dissolve while heating until the solution becomes colorless and transparent, The concentration of the rare earth nitrate solution is controlled between 0.01 mol / L and 0.1 mol / L; the heating temperature is controlled between 40-60° C., and the stirring rate is controlled between 200-500 revolutions / min.

[0039] b. Mo / W salt solution preparation:

[0040] Dissolve the Mo / W salt solution in deionized water, such as one or more of ammonium meta-X (X represents Mo / W), ammonium para-X (X represents Mo / W), or Mo / W ammonium acid obtained by the reaction of molybdenum or tungsten trioxide with ammonia water, the solut...

Embodiment 1

[0045] See figure 1 As shown, the raw materials of the experimental method of this embodiment are example of molybdenum trioxide, ammonia water, and lanthanum nitrate.

[0046] 1) Preparation of raw material solution: dissolving lanthanum nitrate in ionized water to obtain a lanthanum nitrate solution with a concentration of 0.035mol / L; dissolving molybdenum trioxide in ammonia water to obtain an ammonium molybdate solution with a concentration of 0.07mol / L, Stir continuously until the solution becomes colorless and transparent.

[0047] 2) Connect the lanthanum nitrate solution to the solution inlet 1 of the micronizer through a connecting tube. Connect the solution inlet 2 of the ammonium molybdate solution miniaturization reactor. The outlet 3 is connected to the reaction product collector.

[0048] 3) Check the working status of the micronizer to confirm that the instrument is operating normally.

[0049] 4) Adjust the temperature of the water bath in the micronizer, t...

Embodiment 2

[0054] The raw materials of the experimental method in this embodiment are exemplified by molybdenum trioxide, ammonia water, and lanthanum nitrate.

[0055] 1) Preparation of raw material solution: dissolving lanthanum nitrate in deionized water to obtain a lanthanum nitrate solution with a concentration of 0.046mol / L; dissolving molybdenum trioxide in ammonia water to obtain an ammonium molybdate solution with a concentration of 0.092mol / L , and kept stirring until the solution became colorless and transparent.

[0056] 2) Connect the lanthanum nitrate solution to the solution inlet 1 of the micronizer through a connecting tube. Connect the solution inlet 2 of the ammonium molybdate solution miniaturization reactor. The outlet 3 is connected to the reaction product collector.

[0057] 3) Check the working status of the micronizer to confirm that the instrument is operating normally.

[0058] 4) Adjust the temperature of the water bath in the micronizer, the temperature is...

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 diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses nano-scale rare earth oxide-doped powder and a preparation method thereof. The preparation method of the powder comprises the steps: preparing a rare earth salt solution and aMo / W acid salt solution, introducing the raw materials into a micro-reactor, and controlling the proportion, flow rate and solution concentration of the raw materials and the bath temperature so as toobtain the nano-scale rare earth oxide-doped powder finally. The speed of a doping reaction is regulated through control on the ratio of the proportion, flow rate and solution concentration of the raw materials introduced into the micro-reactor and the bath temperature, so that the conditions of nucleation and growth of the product powder are controlled; and the nano-scale rare earth oxide-dopedpowder prepared by using the method has a particle size range of 3-20 nm, the doped powder has uniform components and good sphericity, and continuous and large-scale production of the doped powder canbe achieved through combination of the advantages of the micro-reactor.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and relates to a nanoscale rare earth oxide doped powder and a preparation method thereof. Background technique [0002] Metal molybdenum and tungsten are rare refractory metals with high melting point, elastic modulus, good electrical and thermal conductivity and low thermal expansion coefficient, as well as good acid and alkali resistance and liquid metal corrosion resistance, so they are used in aerospace It has been widely used in various fields such as machinery manufacturing, power electronics, iron and steel metallurgy, medical equipment, lighting, energy and chemical industry, and military industry, and is an indispensable high-temperature resistant material. With the development of science and technology, especially the increasing demand for national defense, higher requirements are put forward for the comprehensive performance of molybdenum alloys and tungsten alloys. For thi...

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): C01G39/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G39/006C01P2002/52C01P2002/72C01P2004/04C01P2004/32C01P2004/64
Inventor 丁向东李天宇孙军孙院军
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com