Translucent yttrium aluminum garnet: Microwave-assisted route to synthesis and processing

Panneerselvam, M.; Subanna, GN; Rao, K. J.

doi:10.1557/jmr.2001.0379

Cited by 32 publications

(17 citation statements)

References 24 publications

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“…This isotherm gives an expression encompassing the surface heterogeneity and the exponential distribution of active sites and their energies [13], [14]. The adsorption data were tested on the following linearized form of Freundlich adsorption isotherm by plotting q e verses Ce (6) where Ce is the amount adsorbed at equilibrium or the equilibrium concentration of adsorbate [mg.L -1 ], and n and K are the Freundlich constants characteristics of the system indicating the extent of the adsorption and the degree of non-linearity between metal solution concentrates and adsorption, respectively. Fig.…”

Section: E Freundlich Adsorption Isotherm Modelmentioning

confidence: 99%

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Adsorption of Pb(II) on Nano Sized SnO2 Derived from Sol-Gel Method

Rejani¹,

Radhakrishnan²,

Beena³

2014

IJCEA

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Abstract-This study investigates the applicability of SnO 2 nanoparticles for the removal of Pb(II) from waste water . SnO 2 nano particles of 15 nm size were synthesized using a solgel method and characterized by X-ray diffraction (XRD), FTIR, SEM and transmission electron microscope (TEM). Batch experiments were carried out to study the adsorption kinetics of Pb(II) on SnO 2 . The effect of varying parameters such as contact time and P H on the adsorption process were examined. The adsorption process was found to be highly P H dependent. Experimental kinetic data were tested with pseudofirst -order and pseudo-second-order kinetic equations. The equilibrium data were modeled using general isotherm models. The experimental data agreed well with Langmuir isotherm model.Index Terms-Sol-gel method, adsorption, removal of lead.

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Section: E Freundlich Adsorption Isotherm Modelmentioning

confidence: 99%

“…The versatility of sol-gel chemistry provides a means of controlling the shape, morphology and textural properties of the final materials [4], [5]. Sol-gel chemistry also provides a means of preparing mixed oxide phases and can be controlled on both the molecular and nanoscales [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) on Nano Sized SnO2 Derived from Sol-Gel Method

Rejani¹,

Radhakrishnan²,

Beena³

2014

IJCEA

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“…The differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) of as‐dried powders are shown in Figure . In Figure A (A 1 powder with 0 wt% TEOS), an endothermic peak below 200°C was accompanied by 6 wt% weight loss; it belonged to the removal of adsorbed water . Two sharp endothermic peaks could be observed in the range of 450°C‐550°C and 550°C‐700°C in DSC curve that were accompanied by 19 wt% weight loss in the TGA curve; these were due to the decomposition of nitrate ions and the removal of organic molecules (the decomposition of precipitant agent (urea molecules)), respectively .…”

Section: Resultsmentioning

confidence: 94%

The effects of TEOS on the microstructure and phase evolutions of YAG phase by formation of alumina/yttria core‐shell structures

et al. 2017

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In this work, pure yttrium aluminum garnet was obtained by the partial chemical method at the low temperature. In this approach, alpha‐alumina nanoparticle, yttrium nitrate, urea, and tetraethyl orthosilicate (TEOS) were used as Al3+, Y3+, precipitation agent, and both dispersant and phase formation assistant agents, respectively. The results showed that TEOS molecules as a dispersant agent caused the less agglomeration of the alumina‐yttria core‐shell structure with a diameter of 200‐300 nm, as compared to particles obtained without using TEOS molecules. Furthermore, by using 0.5 and 1 wt% of TEOS, the YAG formation temperature was decreased from 1400°C to 1200°C through the liquid‐phase diffusion mechanism. Thus, in this case, the TEOS molecules acted as phase formation assistant agent for the constitution of YAG phases.

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“…The synthesis of undoped YAG powder and sintering of compacts with the use of microwave power of 2.45 GHz was described in [12], where a 45% transmission of 520 nm radiation was obtained in a 0.86 mm thick pellet. The use of the millimeter-wave power for the sintering of optical ceramics started in 2005 [13].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of transparent ceramics by millimeter‐wave sintering

Bykov

Eremeev

2013

Phys. Status Solidi C

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The distinctive features of the millimeter‐wave sintering which make a method appealing for fabrication of optical ceramics are discussed. Among them are the absence of high temperature resistive heaters and the problem of their service life, favorable for elimination of porosity the inverse temperature distribution inherent in the volumetric microwave heating, highly uniform distribution of the millimeter‐wave energy in applicators allowing for the sintering of large‐size articles. This paper reports the results of the research on fabrication of optically transparent ceramics of compositions Nd:Y2O3, Yb:YAG, and Yb:(LaY)2O3 using a gyrotron‐based set‐up operating at frequency of 24 GHz. The green bodies of different compositions were compacted from powders produced by different methods: Nd:Y2O3 from the powder synthesized by laser evaporation of the target, Yb:YAG from a mixture of commercial powders, Yb:(LaY)2O3 from powder fabricated by self‐propagating high‐temperature synthesis. Laser oscillation was obtained from the sintered samples of all compositions. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Translucent yttrium aluminum garnet: Microwave-assisted route to synthesis and processing

Cited by 32 publications

References 24 publications

Adsorption of Pb(II) on Nano Sized SnO2 Derived from Sol-Gel Method

Adsorption of Pb(II) on Nano Sized SnO2 Derived from Sol-Gel Method

The effects of TEOS on the microstructure and phase evolutions of YAG phase by formation of alumina/yttria core‐shell structures

Fabrication of transparent ceramics by millimeter‐wave sintering

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