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Hollow MAX phase powder with controllable morphology and preparation method thereof

A hollow and powder technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as the inability to achieve controllable morphology of hollow MAX phases

Pending Publication Date: 2022-07-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a hollow MAX phase powder with controllable morphology and its preparation method, which is used to solve the technology that the preparation method cannot realize the controllable morphology of the hollow MAX phase question

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  • Hollow MAX phase powder with controllable morphology and preparation method thereof
  • Hollow MAX phase powder with controllable morphology and preparation method thereof
  • Hollow MAX phase powder with controllable morphology and preparation method thereof

Examples

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Embodiment 1

[0035] A hollow rod-shaped Ti 2 (Al 0.9 , Ga 0.1 ) The preparation method of C powder, comprises the following steps:

[0036] S1: The chopped carbon fiber, NaCl and KCl are mixed and simply ground according to the molar ratio of 1:1:1, and then loaded into a magnetic boat, and the magnetic boat is placed in a tube furnace under an argon atmosphere for molten salt heating treatment. The heating rate of the molten salt heating treatment is 4°C / min, the treatment temperature is 800°C, the cooling rate is 2°C / min, the holding time is 3h, and the first reaction product is obtained after the reaction is completed;

[0037] S2: Mix Ti powder, Al powder, Ga powder, NaCl and KCl according to a molar ratio of 2:0.9:0.1:1:1, put them into a magnetic boat, and place the magnetic boat in a tube furnace under an argon atmosphere. Low temperature molten salt heating treatment, the temperature rising rate of the low temperature molten salt heating treatment is 4°C / min, the treatment tempe...

Embodiment 2

[0040] A hollow spherical (Ti 0.8 V 0.1 Cr 0.1 ) 2 The preparation method of AlC powder comprises the following steps:

[0041] S1: The carbon microspheres, NaCl and KCl are mixed and simply ground according to the molar ratio of 1:1:1 and then loaded into a magnetic boat, and the magnetic boat is placed in a tube furnace under an argon atmosphere for molten salt heating treatment. The heating rate of the molten salt heating treatment is 4°C / min, the treatment temperature is 600°C, the cooling rate is 2°C / min, the holding time is 3h, and the first reaction product is obtained after the reaction is completed;

[0042] S2: Mix Ti powder, V powder, Cr powder, Al powder, NaCl and KCl according to the molar ratio of 1.6:0.2:0.2:1:1:1, load into a magnetic boat, and place the magnetic boat in a tube furnace The low-temperature molten salt heating treatment is carried out under an argon atmosphere. The heating rate of the low-temperature molten salt heating treatment is 4°C / min, ...

Embodiment 3

[0045] A hollow rod-shaped Ti 3 AlC 2 The preparation method of powder comprises the following steps:

[0046] S1: The chopped carbon fiber, NaCl and KCl are mixed and simply ground according to the molar ratio of 1:1:1, and then loaded into a magnetic boat, and the magnetic boat is placed in a tube furnace under an argon atmosphere for molten salt heating treatment. The heating rate of the molten salt heating treatment is 4°C / min, the treatment temperature is 800°C, the cooling rate is 2°C / min, the holding time is 3h, and the first reaction product is obtained after the reaction is completed;

[0047] S2: Mix Ti powder, Al powder, NaCl and KCl according to the molar ratio of 3:1:1:1, load into a magnetic boat, place the magnetic boat in a tube furnace under argon atmosphere for low temperature molten salt heating treatment , the heating rate of the low-temperature molten salt heating treatment is 4°C / min, the processing temperature is 1200°C, the cooling rate is 2°C / min, th...

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Abstract

The invention discloses shape-controllable hollow MAX phase powder and a preparation method thereof, belongs to the technical field of ceramic material preparation, and aims to solve the technical problem that shape-controllable preparation of a hollow MAX phase cannot be realized by an existing preparation method. Firstly, amorphous carbon powder and inorganic mixed salt are subjected to fused salt heating treatment, then M-site metal powder, A-site metal powder and the inorganic mixed salt are mixed and subjected to low-temperature fused salt heating treatment, reaction products obtained in the two steps are mixed and subjected to high-temperature fused salt heating reaction treatment, and finally the shape-controllable hollow MAX phase powder is obtained. According to the method disclosed by the invention, the hollow MAX phase powder is prepared by adopting different carbon sources and a two-step molten salt pretreatment process, so that the purpose of controllable morphology is achieved.

Description

technical field [0001] The invention belongs to the technical field of ceramic material preparation, in particular to a hollow MAX phase powder with controllable morphology and a preparation method thereof. Background technique [0002] The MAX phase is a class of ternary layered compound materials, because it has both metal and ceramic properties, including high temperature stability, electrical properties, excellent mechanical properties, corrosion resistance, and hardness and mechanical properties. Originals, high temperature and oxidation resistant coatings, electrodes, biological materials, and corrosion-resistant materials have a broad application background. Especially with the successful preparation of MXene, the MAX phase as its sole precursor has received extensive attention, and the MAX phase with special morphologies has gradually gained attention. The controllable morphology of MAX phase or the preparation of hollow MAX phase can realize the lightweight of MAX ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/90C04B35/56C04B35/626
CPCC01B32/90C04B35/56C04B35/62675C01P2002/72C01P2004/03C01P2004/10C01P2004/34
Inventor 刘毅王闯业罗威严尧袁宁凯张利锋郭守武
Owner SHAANXI UNIV OF SCI & TECH