Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparing method of superfine M1-xTixB2 powder

A m1-xtixb2-b2o3 powder technology, applied in the field of preparation of ultra-fine M1-xTixB2 powder, can solve the problems of unfavorable powder sintering and post-processing, difficult to remove residue, coarse powder particle size, etc., and achieve low cost , small particle size and low degree of agglomeration

Active Publication Date: 2017-03-22
GUANGDONG UNIV OF TECH
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the raw materials are expensive, and the synthetic MB 2 Coarse powder particle size and low activity are not conducive to powder sintering and post-processing
2) High-temperature self-propagating method: Although the traditional SHS method can obtain high-purity ZrB 2 powder, but the residue is difficult to remove; the existing SHS method uses zirconium hydride and elemental boron as raw materials and synthesizes it under an argon atmosphere, although powders with a particle size of less than 1 μm can be obtained
Even for those preparation methods that can synthesize particles with a particle size of less than 1 μm, the process is too complicated and the purity is not high

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
  • Preparing method of superfine M1-xTixB2 powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Choose ZrO 2 、TiO 2 and boron powder as powder raw material, ZrO 2 and TiO 2 The particle size distribution is 1μm and 0.1μm, weigh 100mmol ZrO 2 Doped with 5% TiO 2 ZrO 2 -TiO 2 Mix powder and 367mmol elemental boron, use acetone as solvent, Si 3 N 4 The balls were used as the ball milling medium, mixed on a roller mill for 24 hours, and dried by rotary evaporation to obtain ZrO 2 -TiO 2 -B mixed powder, then ZrO 2 -TiO 2 -B The mixed powder is placed in a graphite crucible, heated to 1000°C and kept for 2 hours in a graphite furnace at a pressure lower than 200Pa to obtain Zr 0.95 Ti 0.05 B 2 -B 2 o 3 Powder.

[0028] Will get Zr 0.95 Ti 0.05 B 2 -B 2 o 3 Under the condition that the air pressure is lower than 200Pa, continue heating to 1550°C and keep it for 1 hour to obtain ultrafine Zr 0.95 Ti 0.05 B 2 Powder, the average particle size is 500nm.

[0029] figure 1 For the prepared Zr 0.95 Ti 0.05 B 2 The SEM photograph of the powder, by f...

Embodiment 2

[0031] The only difference between this example and Example 1 is: under the condition that the air pressure is lower than 200Pa, it is heated to 900°C and kept for 1 hour.

[0032] The rest of the content is exactly the same as described in Example 1.

[0033] Know through detecting and analyzing: the Zr that present embodiment makes 0.95 Ti 0.05 B 2 The average particle diameter of the powder is 300nm, and the oxygen content is 0.15wt%.

Embodiment 3

[0035] The only difference between this example and Example 1 is that: under the condition that the air pressure is lower than 200Pa, the solid-dissolved TiB 2 The content x is 0.5%.

[0036] The rest of the content is exactly the same as described in Example 1.

[0037] Know through detecting and analyzing: the Zr that present embodiment makes 0.995 Ti 0.005 B 2 The average particle diameter of the powder is 500nm, and the oxygen content is 0.10wt%.

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
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparing method of superfine M1-xTixB2 powder. The preparing method comprises the following steps: doping TiO2 powder into MO2 powder so as to obtain mixed MO2-TiO2 powder, wherein the molar percent x of the TiO2 powder is 0.5-20%, blending the MO2-TiO2 powder and elementary boron powder according to a molar ratio of 1:2.5 to 1:5, ball-milling, mixing, obtaining MO2-TiO2-B mixed powder after drying, putting the MO2-TiO2-B mixed powder in a graphite crucible, first carrying out first-step low-temperature heat preservation under atmospheric pressure which is lower than 200Pa or at an inert atmosphere, and then continuously raising the temperature to carry out second-step heat preservation so as to obtain the M1-xTixB2 powder. By doping the TiO2 into the MO2 to modify the MO2, the superfine M1-xTixB2 powder is synthesized. The cost is obviously reduced, the preparing technology is simple, and the cost is low.

Description

technical field [0001] The present invention relates to the use of MO 2 Powder (particle size ≤ 10μm) doped with TiO 2 Afterwards, superfine M is obtained by reduction reaction with boron powder 1-x Ti x B 2 A preparation method of (M=Zr, Hf) powder (particle size ≤ 1 μm), specifically, based on TiB 2 and MB 2 have similar properties, involving a MB 2 Medium solid solution TiB 2 method to achieve changing MB 2 and B 2 o 3 The purpose of blending between each other is to prevent MB 2 at high temperature B 2 o 3 grow in the formed liquid phase, thus preparing ultrafine M 1-x Ti x B 2 The method for powder (particle size ≤ 1 μm) belongs to the technical field of powder preparation. Background technique [0002] Transition metal boride MB 2 (M=Zr, Hf) has excellent properties such as high melting point, hardness, thermal stability, and corrosion resistance. It is widely used in the production of ultra-high temperature structural materials, composite materials, a...

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): C01B35/04B82Y40/00
CPCC01B35/04C01P2004/03C01P2004/62C01P2004/64
Inventor 郭伟明吴利翔林华泰
Owner GUANGDONG UNIV OF TECH