Dielectric and ac ionic conductivity investigations in the monetite

Louati, B.; Guidara, K.; Gargouri, M.

doi:10.1016/j.jallcom.2008.04.050

Cited by 54 publications

(24 citation statements)

References 38 publications

(34 reference statements)

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“…There is an interesting study on the interaction of a blood coagulation factor on electrically polarized HA surfaces [355]. Further details on the electrical properties of calcium orthophosphate-based bioceramics are available in literature [279,[356][357][358][359][360].…”

Section: Electrical Propertiesmentioning

confidence: 99%

Medical Application of Calcium Orthophosphate Bioceramics

Dorozhkin¹

2011

BIO

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In the late 1960's, a strong interest was raised in biomedical applications of ceramic materials (named bioceramics a little bit later). Bioceramics was initially used as reasonable alternatives to metals in order to increase their biocompatibility. However, within a short period, it has grown into a diverse class of biomaterials, presently including three essential types: relatively bioinert, bioactive (or surface reactive) and bioresorbable bioceramics. This review is limited to bioceramics prepared from calcium orthophosphates only, which belong to the categories of bioactive and bioresorbable compounds. There have been a number of important advances in this field during the past 30 -40 years. The research was shifted from an initial study on the develop-ment of bioinert bioceramics towards bioactive and bioresorbable bioceramics, and these different types of calcium orthophosphate bioceramics can be tuned through the structural and compositional control. At the turn of the millennium, a new concept of calcium orthophosphate bioceramics has been developed to promote a regeneration of bones. Current biomedical applications of calcium orthophosphate bioceramics include artificial replacements for hips, knees, teeth, tendons and ligaments, as well as repair for periodontal disease, maxillofacial reconstruction, augmenttation and stabilization of the jawbone, spinal fusion and bone fillers after tumor surgery. Potential future applications of calcium orthophosphate bioceramics are demonstrated in drug delivery systems, effective carriers of growth factors, bioactive peptides and/or various types of cells for tissue engineering purposes.

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Section: Electrical Propertiesmentioning

confidence: 99%

Medical Application of Calcium Orthophosphate Bioceramics

Dorozhkin¹

2011

BIO

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“…There is an interesting study on the interaction of a blood coagulation factor on electrically polarized HA surfaces [423]. Further details on the electric properties of CaPO 4 -based bioceramics are available in literature [304,389,390,[424][425][426][427][428]. [498].…”

Section: Electric/dielectric and Piezoelectric Propertiesmentioning

confidence: 99%

Calcium orthophosphate bioceramics

Dorozhkin¹

2015

Ceramics International

209

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“…However, in ionically conducting materials, at low frequencies there is an unavoidable electrode polarization effect and the dielectric constant is rather high. This often yields a large experimental error during the separation of dc conductivity from the total conductivity [34]. An analysis of the ion conductivity relaxation process in polycrystalline has been undertaken in the complex modulus M* formalism.…”

Section: Dielectric Studymentioning

confidence: 99%

Electrical conduction and thermodynamic properties of K2NiP2O7

Said

Louati

Guidara

2013

Ionics

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The pyrophosphate K 2 NiP 2 O 7 has been synthesized by the classic ceramic method and characterized by Xray diffraction, solid-state 31 P magic angle spinning (MAS) NMR, and IR and electrical impedance spectroscopy. The solid-state 31 P MAS NMR, performed at 121.49 MHz, shows two isotropic resonances at −17.66 and −19.94 ppm, revealing the existence of two phosphorus environments in the structure. The electrical conductivity and dielectric properties have been investigated in the frequency and the temperature range of 200 Hz-1 MHz and 603-728 K, respectively. The frequency dependence of the conductivity is interpreted using the augmented Jonscher relation. The close values of activation energies obtained from the analysis of hopping frequency and dc conductivity imply that the transport is through ion hopping mechanism. The charge carrier concentration in the investigated sample has been evaluated using the Almond-West formalism and shown to be independent of temperature. Thermodynamic parameters such as the free energy of activation ΔF, the enthalpy ΔH , and the change in entropy ΔS have been calculated.

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Dielectric and ac ionic conductivity investigations in the monetite

Cited by 54 publications

References 38 publications

Medical Application of Calcium Orthophosphate Bioceramics

Medical Application of Calcium Orthophosphate Bioceramics

Calcium orthophosphate bioceramics

Electrical conduction and thermodynamic properties of K2NiP2O7

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