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Method for producing nano chromium nitride powder

A nano-nitridation and powder technology, applied in the direction of nanotechnology, nanotechnology, nitrogen-metal/silicon/boron binary compounds, etc., can solve the problems of increasing difficulty and dangerous yield

Active Publication Date: 2013-07-17
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

High temperature treatment of organic solvents is potentially dangerous and the yield is low, which increases the difficulty of its industrial production

Method used

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  • Method for producing nano chromium nitride powder
  • Method for producing nano chromium nitride powder

Examples

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Effect test

Embodiment 1

[0019] Weigh 0.05 mol of chromium nitrate and 0.05 mol of glycine and dissolve them in 150 ml of distilled water to prepare a solution, and heat the solution on a temperature-controllable electric furnace at 300°C. After the solution undergoes a series of processes such as volatilization, concentration, and bubbling, the precursor powder is obtained. After the precursor powder is pulverized, it is reacted in the furnace at 800 °C and the flow rate of ammonia gas is 0.25 L / min for 6 hours to obtain Nano chromium nitride powder.

Embodiment 2

[0021] Weigh 0.05 moles of chromium nitrate, 0.05 moles of glycine, and 0.075 moles of glucose and dissolve them in 150 ml of distilled water to prepare a solution, and heat the solution on a temperature-controllable electric furnace at 300°C. After the solution undergoes a series of processes such as volatilization, concentration, and bubbling, the precursor powder is obtained. After the precursor powder is pulverized, it is treated in the air at 700°C for 90 minutes. / min under the condition of reaction in the furnace for 6 hours to obtain nano-chromium nitride powder.

Embodiment 3

[0023] Weigh 0.05 moles of chromium nitrate, 0.05 moles of glycine, and 0.05 moles of glucose and dissolve them in 150 ml of distilled water to prepare a solution, and heat the solution on a temperature-controllable electric furnace at 300°C. After the solution undergoes a series of processes such as volatilization, concentration, and bubbling, the precursor powder is obtained. After the precursor powder is pulverized, it is treated in the air at 700°C for 60 minutes. / min conditions in the furnace for 4 hours to obtain nano-chromium nitride powder.

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Abstract

The invention belongs to the technical field of the preparation of ceramic powder, and in particular relates to a method for producing nano chromium nitride powder. The technical process comprises the following steps of: (1) dissolving chromic nitrate, glycine or glycine and glucose in a certain proportion in distilled water; (2) heating and stirring, volatilizing, concentrating and bubbling the liquid to obtain precursor powder; and (3) introducing ammonia to the precursor powder or power untreated in a furnace at 600-1000 DEG C to react for 0.5-20 hours, wherein the ammonia flow is 0.25-5L / min. The method provided by the invention is simple in preparation process, short in production period and easy to realize industrial production, and chromium nitride powder obtained is better in dispersibility.

Description

technical field [0001] The invention belongs to the technical field of ceramic powder preparation, and in particular relates to a method for producing nano chromium nitride powder. Background technique [0002] Chromium nitrides are CrN and Cr 2 N, CrN is a cubic crystal structure, Cr 2 N is a hexagonal crystal system. CrN [0003] Insoluble in water and acid, good chemical stability. CrN and Cr 2 N is an important metallurgical second phase of heat-resistant alloys. [0004] Especially for special steel, it can be used as a strengthening additive. Chromium nitride (CrN) powder has many excellent properties, such as high hardness, good acid and alkali corrosion resistance, high chemical stability, good wear resistance, high melting point, etc., making it widely used in magnetism, electronics industry, high temperature resistance Structural ceramics, catalysts and many other aspects have been widely used. Chromium nitride is also the only material that is antiferroma...

Claims

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Application Information

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IPC IPC(8): C01B21/06C04B35/626C04B35/58B82Y30/00
Inventor 秦明礼曹知勤曲选辉储爱民黄敏吴昊阳刘烨贾宝瑞
Owner UNIV OF SCI & TECH BEIJING
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