The effects of processing parameters on formation of nano-spinel (MgAl 2 O 4 ) from LiCl moltensalt
Source abstract
Abstract
Abstract Nano-MgAl 2 O 4 particles were successfully synthesized at 850 °C using the molten-salt method, and the effects of processing parameters, such as temperature, holding time and amount of salt on the crystallization of MgAl 2 O 4 were investigated. Nano-alumina, magnesia and lithium chloride were used as starting materials. LiCl molten salt provided a liquid medium for reaction of Al 2 O 3 and MgO to form MgAl 2 O 4 . The results demonstrated that MgAl 2 O 4 started to form at about 650 °C and that, after the temperature was increased to 1000 °C, the amounts of MgAl 2 O 4 in the resultant powders increased with a concomitant decrease in Al 2 O 3 and MgO contents. After washing with hot-distilled water, the samples heated for 3 h at 850 °C were single-phase MgAl 2 O 4 with 30–50 nm particle size. Furthermore, the synthesized MgAl 2 O 4 particles retained the size and morphology of the Al 2 O 3 powders, which indicated that a template formation mechanism dominated the formation of MgAl 2 O 4 by molten-salt method.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Magnesium Oxide Properties and Applications · Microwave Dielectric Ceramics Synthesis
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References (30)
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