0000000000328892

AUTHOR

E. Moya

showing 3 related works from this author

A study of KNbO3in the pressure range to 12 GPa using synchrotron radiation

1997

Abstract Orthorhombic KNbO3 has been studied by x-ray diffraction as a function of pressure. The lattice cell parameters, volume and stability range of this phase have been determined as a function of the applied pressure. No structural transformation has been observed up to 12 GPa. The resulting P-V data are fitted to a Murnaghan equation state of first-order.

DiffractionMaterials sciencebusiness.industrySynchrotron radiationThermodynamicsCondensed Matter PhysicsStructural transformationElectronic Optical and Magnetic MaterialsPressure rangeCondensed Matter::Materials ScienceOpticsLattice (order)Orthorhombic crystal systembusinessFerroelectrics Letters Section
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Pressure dependence of the low-frequency dielectric constant of KNbO_3

1997

The effect of pressure on the low-frequency dielectric constant, $\epsilon_0$, of single crystals of KNbO_3 is investigated by means of capacitance measurements. The dielectric constant increases with pressure up to 22.5 kbar, where it exhibits a large value ($\epsilon_0$ = 5000), and then decreases. This change in its behaviour is related to a phase transition induced by pressure. On decompression, the samples do not revert back to the ambient pressure phase.

PermittivityCondensed Matter - Materials SciencePotassium niobateMaterials scienceCondensed matter physicsMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesFrequency dependenceDielectricLow frequencyPressure dependenceCondensed Matter PhysicsCapacitanceElectronic Optical and Magnetic Materialschemistry.chemical_compoundchemistry
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Optimización de las osteotomías de tibia mediante cálculos matemáticos

1995

El objetivo de este trabajo es aclarar con cálculos matemáticos las dificultades que existen en cuanto a la relación entre la cuña a resecar con la desviación a corregir y los diferentes alargamientos según que las osteotomías sean cuneiformes o bien arciformes. Así hemos llegado a las siguientes conclusiones: 1) Se ha establecido una fórmula matemática que nos permite obtener una relación exacta entre la cuña a resecar y la desviación a corregir; 2) Se demuestra el importante rol que juega el ancho de la metáfisis como factor relevante en la cuña a resecar; 3) Las osteotomías cuneiformes producen un acortamiento real del hueso, que se ve compensado con la corrección del eje del mismo; 4) L…

Medicina clínicaUNESCO::CIENCIAS MÉDICAS:CIENCIAS MÉDICAS [UNESCO]Ciencias de la salud
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