From optimization to dielectric resonator antenna (DRA) application of YIG: Synthesis approach

Ali, Wan Fahmin Faiz Wan; Othman, Mohamadariff; Ain, Mohd Fadzil; Abdullah, Norazharuddin Shah; Ahmad, Zainal Arifin

doi:10.1016/j.jallcom.2015.05.092

Cited by 9 publications

(2 citation statements)

References 27 publications

(27 reference statements)

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“…YAG has been widely used as a host material in various solid-state laser [1] as such in dental lasers for softening tissue in the oral cavity, developing laser igniters, spark plug in the automotive industry [2,3]. However, these applications are highly dependent on the microstructural features of these ceramics such as high density, fine grain size with uniform crystal structure/phases [4]. In a practical process, the characteristic so-called impeccable materials are almost impossible to synthesized using a conventional solid-state method.…”

Section: Introductionmentioning

confidence: 99%

Formation of Yttria Aluminium Garnet by Microwave Sintering

Halim

Izman

Ali

et al. 2020

MSF

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Polycrystalline yttrium aluminium garnet (YAG) ceramic has been prepared using microwave sintering. Micron-sized of Al2O3 and Y2O3 powders were mixed through in house fabrication mixer for 24 hours before calcined at 1100 °C and palletization process. The effect of sintering parameters on the microstructures was observed at various and holding times. X-ray diffraction (XRD) analysis was carried out to determine and quantify phase transformation with respect to these parameters. It was found that three phases namely YAM (Y4Al2O9), YAP (YAlO3) and YAG have been identified. While both grain sizes and density of sintered samples were found increased from 1.4 μm to 2.46 μm and 90% to 98%, respectively. Therefore, microwave sintering has a significant effect on the densification behavior of YAG.

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Section: Introductionmentioning

confidence: 99%

Formation of Yttria Aluminium Garnet by Microwave Sintering

Halim

Izman

Ali

et al. 2020

MSF

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“…This phase evolution (i.e., control) has been studied by many researchers. Both [3,4] in their work were investigated high purity YIG can be achieved by modification of YIG stoichiometry at various reaction temperatures.…”

Section: Introductionmentioning

confidence: 99%

Phase Evolution of Yttrium Iron Garnet (YIG) Made by Solid State Sintering: Particle Size Effect

Ali

Abdullah

Ain

et al. 2016

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The phase evolution of yttrium iron garnet (YIG) during reaction 3Y2O3-5Fe2O3 was investigated by modifying Fe2O3 particle sizes (FPS). Five different sizes of Fe2O3, (d50) are used to prepare YIG powder. Solid state reaction (SSR) was applied at 1200 °C in order to gain insight on the effect of FPS towards the YIG formation. Rietveld refinement method was used to quantify the amount of YIG yielded (%). Larger FPS (> 50 μm) initiates only 5Fe2O3 + 3Y2O3 à 3YFeO3 + Fe2O3 + Y3Fe5O12.. However, when the fine FPS (5 μm) is used, the reaction pathway was changed into 5Fe2O3 + 3Y2O3 à 6YFeO3 + 2Fe2O3 à 2Y3Fe5O12. These behaviors is explained that the smaller FPS consumed quickly to form YIG due to the smaller particle distance between Fe2O3 and Y2O3. This shall be leading to higher reaction rates (mass-transfer kinetics).

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