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Nanocrystalline spinel-carbon composite powder and preparation method thereof

A technology of carbon composite powder and spinel, which is applied in the field of nanocrystalline spinel-carbon composite powder and its preparation, can solve problems such as unevenness and excessive dispersion of spinel grains, and achieve good interface bonding , avoid the effect of excessive grain size and clean interface

Inactive Publication Date: 2010-12-01
WUHAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to overcome the defects of the prior art, and the purpose is to provide a method which is simple in process, easy to realize industrial production, and can directly prepare nanocrystalline spinel-carbon composite powder; the nanocrystalline spinel prepared by this method Stone-carbon composite powder interface is well bonded, has high dispersion, and the crystal particle size is nano-scale, which can avoid the problem of excessive spinel grain size and uneven dispersion of carbon in spinel powder

Method used

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  • Nanocrystalline spinel-carbon composite powder and preparation method thereof
  • Nanocrystalline spinel-carbon composite powder and preparation method thereof
  • Nanocrystalline spinel-carbon composite powder and preparation method thereof

Examples

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Embodiment 1

[0023] A nanocrystalline spinel-carbon composite powder and a preparation method thereof. Using magnesite and metal aluminum powder as raw materials, mixing magnesite and metal aluminum powder at a molar ratio of 3:4 to form a mixed raw material. Then put the mixed raw material and steel ball into the stainless steel ball mill jar according to the mass ratio of mixed raw material and steel ball as 1: (40-60), seal it, vacuumize it to -0.1MPa, and then place it on a planetary ball mill for ball milling for 2-2 ~ After 50 hours, a nanocrystalline spinel-carbon composite powder was prepared.

Embodiment 2

[0025] A nanocrystalline spinel-carbon composite powder and a preparation method thereof. The industrial magnesium carbonate and metal aluminum powder are used as raw materials, and the industrial magnesium carbonate and metal aluminum powder are mixed at a molar ratio of 3:4 to form a mixed raw material. Then put the mixed raw material and steel ball into a stainless steel ball mill tank according to the mass ratio of mixed raw material and steel ball as 1: (40-60), seal it, vacuumize it to -0.1MPa, fill it with high-purity nitrogen, and place it on a planetary Milling on a ball mill for 2 to 50 hours to prepare nano crystal spinel-carbon composite powder.

Embodiment 3

[0027] A nanocrystalline spinel-carbon composite powder and a preparation method thereof. Using chemically pure magnesium carbonate and metal aluminum powder as raw materials, chemically pure magnesium carbonate and metal aluminum powder are mixed in a molar ratio of 3:4 to form a mixed raw material, and metal nickel powder less than 0.1wt% of the mixed raw material is added, and mixed evenly , forming a mixture. Then put the mixture and steel balls into a stainless steel ball mill tank according to the mass ratio of the mixture to steel balls is 1: (40-60) and seal it, vacuumize to -0.1MPa, fill with high-purity argon, and then place Milling on a planetary ball mill for 2 to 50 hours to prepare nano crystal spinel-carbon composite powder.

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Abstract

The invention relates to nanocrystalline spinel-carbon composite powder and a preparation method thereof. The preparation method comprises the following steps of: mixing magnesium carbonate and metal aluminum powder serving as raw materials in a molar ratio of 3:4 or mixing basic magnesium carbonate and the metal aluminum powder serving as the raw materials in a molar ratio of 3:28 to form mixed raw materials respectively, and adding metallic nickel powder, metallic iron powder and hydroxy-nickel powder in an amount which are respectively 0 to 10 weight percent of the mixed raw materials into the mixed raw materials to form a mixture; and loading the mixture and steel balls into a stainless steel ball-milling tank in a mass ratio of 1:(40-60) for sealing, vacuumizing to reach -0.1 MPa, and putting on a planetary ball mill for ball milling for 2 to 50 hours or vacuumizing to reach -0.1 MPa, introducing one of high-purity nitrogen, high-purity argon and CO2 gas, and putting on the planetary ball mill for the ball milling for 2 to 50 hours. The nanocrystalline spinel-carbon composite powder has the advantages of simple process, easy industrialization, direct preparation, good interface combination and high dispersity.

Description

technical field [0001] The invention belongs to the technical field of spinel-carbon composite powder. Specifically relates to a nano crystal spinel-carbon composite powder and a preparation method thereof. Background technique [0002] Magnesium-aluminum spinel is widely used in metallurgy, chemical industry, electronics, military and other industrial fields due to its high melting point, small thermal expansion coefficient, strong resistance to alkaline slag and many other excellent properties. [0003] Introducing carbon into oxide refractories can greatly improve the slag corrosion resistance and spalling resistance of refractories. The carbon content in traditional magnesium-carbon, aluminum-carbon, aluminum-magnesium-carbon and other carbon-containing composite refractory materials is generally 10-20%. With the rapid development of smelting technology, the requirements for the use of refractory materials are also getting higher and higher. Clean steel production pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 柯昌明倪月娥韩兵强
Owner WUHAN UNIV OF SCI & TECH
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