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Preparation method of free-agglomeration MgAl2O4 nanometer particle powder

A nanoparticle and powder technology is applied in the field of preparation of non-agglomerated MgAl2O4 (magnesium aluminum spinel) nanoparticle powder, which can solve problems such as unfavorable densification and sintering of ceramics

Inactive Publication Date: 2013-08-28
SHANGQIU NORMAL UNIVERSITY
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Problems solved by technology

Coarsening and agglomerating nanoparticle powder will lead to a wider pore size distribution in the ceramic green body, which is not conducive to the densification and sintering of ceramics

Method used

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  • Preparation method of free-agglomeration MgAl2O4 nanometer particle powder
  • Preparation method of free-agglomeration MgAl2O4 nanometer particle powder
  • Preparation method of free-agglomeration MgAl2O4 nanometer particle powder

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Embodiment Construction

[0018] The present invention prepares MgAl 2 o 4 The method of nanoparticle powder is to dissolve soluble magnesium salt and aluminum salt in distilled water to prepare Al 3+ The concentration is 0.005~0.5mol / L, Mg 2+ / Al 3+ The ratio of the amount of substances is a mixed brine solution of 5 to 40, and the magnesium salt used can be Mg(NO 3 ) 2 , MgSO 4 , the aluminum salt used is Al(NO 3 ) 3 、Al 2 (SO 4 ) 3 . Then add network agent (C 3 h 5 NO, C 7 h 10 N 2 o 2 ), after being uniformly mixed by mechanical stirring, the initiator [(NH 4 ) 2 S 2 o 8 ] Initiate the polymerization reaction of the polymer network agent, and the polymer three-dimensional network formed in the mixed saline solution makes the mixed system into a wet gel. The wet gel was dried at 80oC in a drying oven to obtain a xerogel (MgAl 2 o 4 Precursor). Then the dry gel was calcined at 850~1000oC for 1~10 h, and the calcined product was washed with acid and water to obtain non-agglomer...

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Abstract

The invention discloses a preparation method of free-agglomeration MgAl2O4 (magnesia-alumina spinel) nanometer particle powder. The preparation method comprises the following steps of: adding network agent C3H5NO and C7H10N2O2 to a mixed saline solution of magnesium salt and aluminum salt; then mechanically stirring, uniformly mixing, and then adding an initiating agent (NH4)2S2O8 to initiate the polymerization reaction of a high-molecular network agent to form a high-molecular three-dimensional network in the mixed saline solution so that a mixed system becomes wet gel; carrying out drying processing on the wet gel to obtain dried gel, namely an MgAl2O4 precursor; and then calcining the dried gel at 850-1000 DEG C, and pickling and washing a calcined product to obtain a free-agglomeration MgAl2O4 target product.

Description

technical field [0001] The invention relates to a preparation method of ceramic powder used in the fields of electronic industry, catalyst and optical equipment, especially a non-agglomerated MgAl 2 o 4 (Magnesium-aluminum spinel) nanoparticle powder preparation method. Background technique [0002] MgAl 2 o 4 It is an important ceramic material, which not only has excellent ceramic properties in many aspects such as mechanics, heat and electricity, but also has light transmission properties similar to glass, and is used in optics, lighting technology, high temperature technology, laser technology and special instrument manufacturing. and other fields have special uses. In particular, it has good optical transmittance (T>70%) in the ultraviolet, visible, and infrared bands, making MgAl 2 o 4 Ceramics can be used to manufacture missile hoods, transparent armor, insulating skeletons of electronic components, infrared band window materials, etc. Therefore, MgAl 2 o ...

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Application Information

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IPC IPC(8): C04B35/443C04B35/626
Inventor 杜雪莲韩晓琴麻焕锋赵世华孙耀祖崔玉亭陈文聪
Owner SHANGQIU NORMAL UNIVERSITY
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