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Method for preparing nanometer MAX phase ceramic powder with laminated structure or slurry through ball milling and regulating oxygen content of powder

A technology of ceramic powder and lamellar structure, which is applied in the field of ceramic materials to achieve the effects of enhancing portability, meeting material requirements, and achieving effectiveness and universality

Active Publication Date: 2019-02-01
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the MAX phase powder material used as a precursor is micron-scale, and the MXenes material particles after etching and stripping are also micron-scale, which completely limits the nanometer characteristics of the nanosheet MXenes material as a functional material

Method used

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  • Method for preparing nanometer MAX phase ceramic powder with laminated structure or slurry through ball milling and regulating oxygen content of powder
  • Method for preparing nanometer MAX phase ceramic powder with laminated structure or slurry through ball milling and regulating oxygen content of powder
  • Method for preparing nanometer MAX phase ceramic powder with laminated structure or slurry through ball milling and regulating oxygen content of powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In this example, the method of ball milling to prepare nano MAX phase ceramic powder or slurry with lamellar structure and control the oxygen content of the powder is as follows:

[0043] (1) Weigh the product name Ti 3 AlC 2 50 grams of MAX phase ceramic powder, the ceramic powder laser particle size analyzer measured particle size median diameter of 100 microns, weighed 0.2 grams of dispersant sodium polymethacrylate.

[0044] (2) Put Ti 3 AlC 2 Ceramic powder and dispersant are packed into a stainless steel ball mill jar with a volume of 500mL that can be fed into the gas, and 400 grams of stainless steel balls are put into it.

[0045] (3) Install the ball mill jar on a planetary ball mill that can continuously feed gas, start to feed a mixed gas with a volume ratio of hydrogen and argon of 1:5, and the gas flow rate is 5 liters / hour, and keep the gas flowing until the ball mill jar The temperature drops to the set point.

[0046] (4) Set the ambient temperatur...

Embodiment 2

[0051] In this example, the method of ball milling to prepare nano MAX phase ceramic powder or slurry with lamellar structure and control the oxygen content of the powder is as follows:

[0052] (1) Weigh the product name as Nb 3 AlC 2 500 grams of MAX phase ceramic powder, the ceramic powder laser particle size analyzer has a particle size of 50 microns in diameter, and liquid argon is used as a medium for ball milling.

[0053] (2) Nb 3 AlC 2 Ceramic powder, put into a polyurethane ball mill tank with a volume of 10L that can pass through gas or liquid, and put 8 kg of polyurethane-coated iron balls.

[0054] (3) Install the ball mill jar on the roller ball mill, start to feed liquid argon and liquid hydrogen into the ball mill jar, the flow rate of liquid argon is 2 liters / hour, and the flow rate of liquid hydrogen is 0.5 liters / hour.

[0055] (4) Maintain the feeding of the liquid gas until the temperature in the ball mill tank is kept constant at -150° C., start the b...

Embodiment 3

[0060] In this example, the method of ball milling to prepare nano MAX phase ceramic powder or slurry with lamellar structure and control the oxygen content of the powder is as follows:

[0061] (1) Weigh the product name Ti 2 AlC MAX phase ceramic powder 500g, powder scanning electron microscope photo see figure 1 . The ceramic powder laser particle size analyzer measures the median diameter of the particle size to be 80 microns (see the results of the particle size measurement data) figure 2 ), measure 1000 milliliters of liquid toluene.

[0062] (2) Put Ti 2 AlC ceramic powder, deionized water packing volume is that 5L can pass into the vacuum agate mill mixing tank of gas, puts into 4 kilograms of agate balls.

[0063] (3) Install the ball mill tank on a stirring ball mill with a temperature-controlled medium jacket and temperature control, start to feed a mixed gas with a volume ratio of oxygen and nitrogen of 1:4, and the gas flow rate is 10 liters / hour, and keep th...

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Abstract

The invention relates to the field of ceramic materials, in particular to a method for preparing nanometer MAX phase ceramic powder with a laminated structure or a slurry through ball milling and regulating the oxygen content of the powder. Micron-sized MAX phase ceramic coarse powder is adopted as a raw material, and during ball milling, a gas or a liquid-state gas with a special effect is fed into a ball milling tank. Through multi-dimensional functions and adjustment such as ball milling parameters and gas reaction, the nanometer laminated MAX phase ceramic powder or the slurry containing the component are obtained, so that the particle size adjustment control of the powder is realized, and meanwhile, the surface components and the activated state of the powder are regulated. The finally obtained powder or slurry can be used as a precursor so as to meet the demands on high-end MXenes material stripping and functionalization, or can be used as MAX phase ceramic nanometer raw materialpowder so as to be used for sintering and preparing the in-situ synthesis nanometer MAX phase / oxide composite ceramic with the regulatable oxide content.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a method for preparing nano MAX phase ceramic powder or slurry with a lamellar structure by ball milling and regulating the oxygen content of the powder. Background technique [0002] MAX phase ceramics (such as: Ti 3 SiC 2 、Ti 2 AlC, Nb 2 AlC, etc.) is a class of machinable ceramics with many unique and excellent properties. This ceramic has covalent bonds, metal bonds, and ionic bonds at the same time, so it has both the properties of ceramics and metals. Such as: high melting point, anti-oxidation and corrosion resistance of ceramic materials, electrical conductivity, machinability, damage capacitance, thermal shock resistance and other properties of metals, and radiation damage resistance of nano-ceramics. The above characteristics make MAX-phase ceramics expected to be applied in high-temperature service parts, friction-resistant parts, conductive elements, corrosion-res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/10B02C17/14B02C23/06B02C25/00
CPCB02C17/10B02C17/14B02C23/06B02C25/00B02C17/1815B02C17/1875C04B2235/723C04B35/5618C04B35/62615C04B35/5607C04B2235/3217C04B2235/3251C04B2235/5454C04B2235/5445C04B2235/5436C04B2235/5427B02C17/04B02C23/24
Inventor 柏春光谢曦崔玉友杨锐
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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