Method for preparing magnesium-aluminum spinel nano particle powder

A magnesium-aluminum spinel and nano-particle technology, which is applied in the direction of alumina/hydroxide, etc., can solve the problems of environmental pollution, high energy consumption, serious agglomeration of magnesium-aluminum spinel nano-particle powder, and achieve particle size Small size, low energy consumption, and the effect of preventing hard agglomeration

Inactive Publication Date: 2011-04-06
CHANGAN UNIV
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Problems solved by technology

This method requires high-temperature calcination conditions above 1000 °C and releases a large amount of CO 2 gas, which consumes a lot of energy and pollutes the environment in industrial production; and the magnesium aluminum spinel nanoparticle powder prepared by this method is seriously agglomerated

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  • Method for preparing magnesium-aluminum spinel nano particle powder
  • Method for preparing magnesium-aluminum spinel nano particle powder

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Embodiment Construction

[0016] The method for preparing magnesium-aluminum spinel nanoparticle powder in the present invention is to prepare aluminum soluble inorganic salts into Al 3+ An aqueous solution with a concentration of 0.5mol / L, the aluminum salt used can be AlCl 3 , or Al(NO 3 ) 3 , or Al 2 (SO 4 ) 3 . Then add alkali, such as ammonia water, sodium hydroxide or other alkali, adjust the pH value of the solution to 9, then filter out aluminum hydroxide, wash it, dry it at 80°C and grind it to 500 mesh Fine powder, then add the ground fine powder into the magnesium sulfate solution, wherein the molar ratio of magnesium sulfate to aluminum hydroxide is 10 to 100, after thorough stirring, carry out drying treatment at 80°C to obtain aluminum hydroxide and The mixed powder of magnesium sulfate is then calcined at 800-950°C for 2-5 hours, and the calcined product is washed with water to remove the magnesium sulfate and then dried at 80°C.

[0017] The preferred preparation method of the pr...

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Abstract

The invention discloses a method for preparing magnesium-aluminum spinel nano particle powder, which comprises the following steps of: preparing water soluble aluminate into an aqueous solution with the Al3<+> concentration of 0.05-1mol/L; then adding alkali; filtering aluminium hydroxide; after washing, carrying out drying treatment and grinding into fine powder in 200-1,000 meshes; adding the ground fine powder into a magnesium sulfate aqueous solution; after fully stirring, carrying out drying treatment to obtain the mixed powder of aluminium hydroxide and magnesium sulfate; calcining the mixed powder at 800-950 DEG C for 2-5 hours; and after washing a calcined product with water and removing magnesium sulfate, carrying out drying treatment under the condition of 80-100 DEG C. The invention discloses an environmental-friendly and energy-saving method for producing high-purity agglomeration-free magnesium-aluminum spinel nano particle powder at an industrial scale.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a preparation method of magnesium aluminum spinel nano particle powder. Background technique [0002] Magnesium aluminum spinel (MgAl 2 o 4 ) belongs to the cubic crystal system and has the characteristics of high melting point (2135°C), high hardness (Mohs hardness is 7.5-8.5), good chemical stability, high temperature resistance, corrosion resistance, small thermal expansion coefficient, and high resistivity. Applied ceramic materials. [0003] Magnesium-aluminum spinel has high melting point, stable physical and chemical properties, and has the advantages of acid and alkali resistance and corrosion resistance, so it is often used as a high-grade refractory material and widely used in cement, chemical and other fields. In the field of electronics industry, magnesium aluminum spinel is used as a substrate material for large-scale integrated circuits. In ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02
Inventor 苏兴华陈拴发艾涛周振君赵鹏
Owner CHANGAN UNIV
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