Thermal and spectroscopic characterization of nanostructured zirconia–scandia–dysprosia

Grosso, Robson L.; Matos, J. R.; Muccillo, E.N.S.

doi:10.1007/s10973-014-3766-7

Cited by 7 publications

(4 citation statements)

References 21 publications

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“…In this context, continuing efforts have been made to find a suitable additive allowing for phase stabilization without excessive deterioration of the ionic conductivity. The additives investigated include those oxides with relatively high solubility such as rare earths [4][5][6][7][8] and other oxides [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Influence of additives on phase stabilization of scandia-doped zirconia

Muccillo¹,

Grosso²,

Reis³

et al. 2017

Matéria (Rio J.)

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The effects of small additions of tin, zinc, calcium and boron oxides on phase composition and electrical conductivity of zirconia-10 mol% scandia were investigated. Compounds containing 1 mol% zinc, tin and calcium oxides and 1, 3 and 5 wt.% boron oxide were prepared by solid state reaction and characterized by X-ray diffraction, density measurements, scanning electron microscopy and impedance spectroscopy. Full stabilization of the cubic structure at room temperature was obtained with additions of 1 mol% calcium oxide and 2 wt.% boron oxide. Partially stabilized compounds exhibit herringbone structure, characteristic of the β-rhombohedric phase. Specimens with calcium as additive show total conductivity of 23.8 mS.cm -1 at 750ºC with activation energy of 1.13 eV. Liquid phase sintering by boron oxide addition is effective to enhance the densification of the solid electrolyte.

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Section: Introductionmentioning

confidence: 99%

Influence of additives on phase stabilization of scandia-doped zirconia

Muccillo¹,

Grosso²,

Reis³

et al. 2017

Matéria (Rio J.)

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“…For example, Gupta et al [18] calculated vapor pressure from constant rates and determined sublimation enthalpy of fentanyl and TATP, respectively, using the Clausius-Clapeyron linear equation [13][14][15][16][17][18][19]. On the other hand, other authors have combined spectroscopic and thermal techniques to study physical and chemical properties of different materials [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…Experimental Experimental decaying of acetyl salicylic acid considering a linear and nonlinear fitting[20] …”

mentioning

confidence: 99%

Nonlinear models of the experimental thermal profile

Espinosa-Fuentes

Pájaro-Payares

Colpas-Castillo

et al. 2015

J Therm Anal Calorim

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This manuscript deals with a mathematical analysis of the functions that should be used in the Clausius-Clapeyron thermodynamic modeling, which is usually modeled as a linear fit; this research emphasizes that the thermal models are nonlinear even taking into account the heat capacity functions as a constant. Specifically, the mathematical analysis of the thermal models proposes what equations should be used depending on the type of enthalpy function. Consequently, the enthalpy functions depend on the model of the heat capacity proposed by Albert Einstein. The magnitude of the errors that would be committed by using linear regressions was also estimated, as is the case for the vast majority of publications in this area. This study also shows how the models behave in a wide temperature range and how they are becoming apparently linear as the temperature range decreases.

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“…For example, in 2008, Gupta et al and in 2011, Felix et al calculated vapor pressure from constants rate and determined sublimation enthalpy of Fentanyl and TATP respectively using the Clausius-Clapeyron linear equation [15][16]. On the other hand, others authors have combined spectroscopic and thermal techniques in order to study physical chemistry properties of different materials [17][18][19]. In this work, we are proposing a mathematical analysis of the several thermal model of the pressure and constant evaporation depending on the H function.…”

Section: Introductionmentioning

confidence: 99%

Non Linear Thermal Decaying Functions

Fuentes¹,

Cervantes²,

Castillo³

2015

Proceedings of the 13th Latin American and Caribbean Conference for Engineering and Technology Engineering Education Facing The

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The present manuscript deals with a deep mathematical analysis of the functions that should be used in the Clausius Clapeyron thermodynamic modelling, which is usually modelled linearly, this research emphasizes that the thermal models are nonlinear even taking into account the heat capacities as a constant. Specifically, the mathematical analysis of the thermal decaying models proposes what equations should be used depending on the type of enthalpy function. Consequently, the enthalpy functions depend on the model of the heat capacity proposed by Albert Einstein. The magnitude of the errors that would be committing by using linear regressions on experimental data were also estimated; as is the case for the vast majority of publications in this area. The study also shows how the models behave in wide temperature range; and how they are becoming apparent linear as the temperature range decreases.

show abstract

Thermal and spectroscopic characterization of nanostructured zirconia–scandia–dysprosia

Cited by 7 publications

References 21 publications

Influence of additives on phase stabilization of scandia-doped zirconia

Influence of additives on phase stabilization of scandia-doped zirconia

Nonlinear models of the experimental thermal profile

Non Linear Thermal Decaying Functions

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