2004
DOI: 10.1111/j.1151-2916.2004.tb06354.x
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Mechanochemical Synthesis of Magnesium Aluminate Spinel Powder at Room Temperature

Abstract: MgAl 2 O 4 spinel was successfully synthesized using a mechanochemical route that avoided the formation and calcination of its precursors at high temperatures. The method involved a single step in which ␥-Al 2 O 3 -MgO, AlO(OH)-MgO, and ␣-Al 2 O 3 -MgO mixtures were milled at room temperature under air atmosphere. The formation of MgAl 2 O 4 occurred faster with ␥-Al 2 O 3 than with AlO(OH) or ␣-Al 2 O 3 . After 140 h, the mechanochemical treatment of the ␥-Al 2 O 3 -MgO mixture yielded 99% of MgAl 2 O 4 .

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Cited by 88 publications
(40 citation statements)
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“…That is why one of the major research directions in the field of materials science is represented by the development of new more efficient synthesis methods. As a result, several different methods have been suggested for the MgAl 2 O 4 synthesis: the ceramic method, [9,10] mechanochemical synthesis, [11,12] sol-gel, [13][14][15] thermal decomposition of complex combinations, [16,17] coprecipitation, [18,19] Pechini, [20] SHS (self-propagating high-temperature synthesis) [21] etc. Yet, in all these in the MgAl 2 O 4 low-temperature combustion synthesis leads to the formation of an amorphous powder.…”
Section: Introductionmentioning
confidence: 99%
“…That is why one of the major research directions in the field of materials science is represented by the development of new more efficient synthesis methods. As a result, several different methods have been suggested for the MgAl 2 O 4 synthesis: the ceramic method, [9,10] mechanochemical synthesis, [11,12] sol-gel, [13][14][15] thermal decomposition of complex combinations, [16,17] coprecipitation, [18,19] Pechini, [20] SHS (self-propagating high-temperature synthesis) [21] etc. Yet, in all these in the MgAl 2 O 4 low-temperature combustion synthesis leads to the formation of an amorphous powder.…”
Section: Introductionmentioning
confidence: 99%
“…A similar methodology was employed in another work (Domanski et al, 2004). According to this semi-quantitative analysis the proportion of the major phase CaZrO 3 in the final mixture, at 1400°C, is 66 %.…”
Section: Evolution Of the Phases D-z On Heating By X-ray Diffractionmentioning
confidence: 96%
“…In some years later the addition of MgAl 2 O 4 -spinel to MgO was a possible alternative for refractories with a significant improvement of the thermomechanical properties of magnesia material. The spinel mixed oxide is very attractive as refractory material in heavy industries because it exhibits an unusual combination of properties: high melting point (2135°C), low thermal expansion, considerable hardness, high resistance to chemical attack, favourable chemical stability, and good thermal spalling (Domanski et al, 2004). Based on their properties these materials are being used for lining by glass, cement and siderurgy industries.…”
mentioning
confidence: 99%
“…Pós mais puros dependem de um rigoroso processo de beneficiamento das matérias-primas, o qual pode aumentar muito o custo final [10,11]. A síntese por combustão em solução é um método interessante para a preparação de óxidos cerâmicos altamente puros e nanocristalinos.…”
Section: (Preparation and Characterization Of Nanostructured Mgal 2 Ounclassified