Materials · 2020 · 13 citations · 51 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsCeramicsMaterials ChemistryCeramic ProcessingEnergy-efficient SynthesisMicrowave MaterialsMicrowave-assisted SynthesisPowder ProcessingPowder TechnologyMicrowave Irradiation EffectsMicrowave-assisted Materials SynthesisMicrowave-assisted PreparationMicrowave-assisted Solid-phase SynthesisParticle Size ReductionPyrometallurgyTitanium OxidesYttrium Aluminum Garnet Ceramics
In the paper, a novel technique for highly dispersed pyrochlore Y2Ti2O7 is proposed. The experimental results proved that the application of microwave irradiation at a certain stage of calcination allowed synthesizing of Y2Ti2O7 in much shorter time, which ensured substantial energy savings. An increase up to 98 wt.% in the content of the preferred phase with a pyrochlore-type structure Y2Ti2O7 was obtained after 25 h of yttrium and titanium oxides calcination at a relatively low temperature of 1150 °C, while the microwave-supported process took only 9 h and provided 99 wt.% of pyrochlore. The proposed technology is suitable for industrial applications, enabling the fabrication of large industrial amounts of pyrochlore without solvent chemistry and high-energy mills. It reduced the cost of both equipment and energy and made the process more environmentally friendly. The particle size and morphology did not change significantly; therefore, the microwave-assisted method can fully replace the traditional one.
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