Sintering and grain growth control of high dense YIG

Ali, Wan Fahmin Faiz Wan; Abdullah, Norazharuddin Shah; Kamarudin, Maslinda; Ain, Mohd Fadzil; Ahmad, Zainal Arifin

doi:10.1016/j.ceramint.2016.06.004

Cited by 11 publications

(3 citation statements)

References 41 publications

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“…In order to produce with densities above 98%, YAG needs to be sintered at high temperature from 1600 o C to 1800 o C which time consuming especially in mass production. Not only this, since YAG is having complex structures in a single cubic crystal may encourage the formation of secondary phases such as YAM (Y4Al2O9) and YAP (YAlO3) albeit they may also be formed because of incomplete diffusion process [6]. The presence of these phases are suggested will hinder or deteriorate the application performance.…”

Section: Introductionmentioning

confidence: 99%

“…In this studies, the phase formation and sintering of YAG synthesized through microwave-assisted sintering is further investigated. The microwave sintering was chosen in this research because of rapid heating, enhanced densification rate, decreased sintering active energy and improved microstructure [6][7][8]. Various sintering temperatures (1300 o C to 1450 o C and holding time (2 h to 8 h) were used to shade the phenomenon of material-microwave interaction.…”

Section: Introductionmentioning

confidence: 99%

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Formation of Yttria Aluminium Garnet by Microwave Sintering

Halim

Izman

Ali

et al. 2020

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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%

Section: Introductionmentioning

confidence: 99%

Formation of Yttria Aluminium Garnet by Microwave Sintering

Halim

Izman

Ali

et al. 2020

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“…Tailoring these sites lead to the improved electrical and magnetic properties in which would enhance the application performance [3]. For example, minute addition of cerium onto dodecahedral sites has produce highly dense final product [4] and wider bandwidth range for dielectric antenna application [5]. While modification of Fe 3+ sites via Al 3+ have improved magnetic interaction [6].…”

Section: Introductionmentioning

confidence: 99%

Investigation of YIG’s Active Site Using Density Functional Theory

Ali

Kamarudin

Abdullah

et al. 2017

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Numerous materials characteristic including yttrium iron garnet (YIG) are directly dependent on its crystal structure; phase diversity. However, only a few examination of energy and its mechanism at atomistic scales was reported. In this article, a density functional theory (DFT) based calculations have been carried out to study electronic properties of cubic Y3Fe5O12 (YIG) at its known active sites; (0,0,4), (2,2,4) and (2,2,4). The density of state (DOS) these sites were presented at-19 eV to-14 eV for lower valance band and-6 eV to 0 for upper valance band. Both (0,0,4) and (0,2,4) planes shows highest possibility of cation substitution since the energy substitution are the lowest (~40 KeV). (2,2,4) plane composed of O-O interaction in which would contribute to the oxygen vacancy.

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