Dielectric characteristics of biocompatible Ca10(PO4)6(OH)2 ceramics

Zakharov, N. A.; Орловский, В. П.

doi:10.1134/1.1398950

Cited by 19 publications

(11 citation statements)

References 4 publications

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“…At lower frequency, it was enhanced in incorporated samples perhaps due to the raised ionic polarization. There was reduction in permittivity at higher frequency, possibly due to the lagging of dipole oscillation with the applied field [28][29][30]. The relative permittivity of Mg 2+ ion incorporated HAp enhanced considerably by 99% and 60% compared to FeHAp and BaTiO 3 -HAp respectively [16,31].…”

Section: Real Part Of Relative Permittivitymentioning

confidence: 99%

Green synthesis of magnesium ion incorporated nanocrystalline hydroxyapatite and their mechanical, dielectric and photoluminescence properties

Arul

Kolanthai

Manikandan

et al. 2015

Materials Research Bulletin

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Section: Real Part Of Relative Permittivitymentioning

confidence: 99%

Green synthesis of magnesium ion incorporated nanocrystalline hydroxyapatite and their mechanical, dielectric and photoluminescence properties

Arul

Kolanthai

Manikandan

et al. 2015

Materials Research Bulletin

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“…A frequency dispersion is observed when the temperature increases from room temperature. This frequency dependence of the relative permittivity becomes dominant with the increase in HA content due to the contribution of OH − ions to HA polarization . Such dispersion could also arise from the reduction in the sintered piezocomposites of BT under SPS processing (Ti 4+ partially reduced in Ti 3+ during sintering under low oxygen partial pressure).…”

Section: Resultsmentioning

confidence: 99%

“…This frequency dependence of the relative permittivity becomes dominant with the increase in HA content due to the contribution of OH À ions to HA polarization. [47][48][49] Such dispersion could also arise from the reduction in the sintered piezocomposites of BT under SPS processing (Ti 4+ partially reduced in Ti 3+ during sintering under low oxygen partial pressure). Dubey et al 18,27 and Bowen et al 22 reported that composites with BT content ≤60 wt% exhibit the lowest values (<40) of dielectric permittivity.…”

Section: Resultsmentioning

confidence: 99%

Hydroxyapatite‐barium titanate piezocomposites with enhanced electrical properties

et al. 2017

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The present work aims to obtain Hydroxyapatite (HA) ‐ Barium Titanate (BT) piezocomposites with improved electrical properties by retaining OH− ions and tuning BT grain size. Dense piezocomposites of HA‐BT were obtained, using single step Spark Plasma Sintering. The presence of OH− ions in the sintered piezocomposites of HA‐BT was confirmed by thermal characterization and Fourier transform infrared transmittance. No decomposition/interaction between HA and BT phases were observed in the complete range of temperature studied. The dielectric and pyroelectric properties were studied as a function of temperature (100 K to 450 K) and frequency (100 Hz to 2 MHz). The influence of the ferroelectric grain size (300 and 500 nm) on the electrical properties of HA‐BT has been analyzed. The dielectric permittivity of HA‐BT ceramics can be enhanced with appropriate ferroelectric grain size and volume fraction of BT (<80%).

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“…Zakharov et al showed clear temperature dependence of permittivity and dielectric loss of HAp (Zakharov & Orlovskii, 2001). (Kobayashi et al, 2001) Kizuki, Katsura, & Yamashita, 2001).…”

Section: Surface-polarized Materialsmentioning

confidence: 99%

“…When the material is cooled and the electric field is removed, the ion carriers remain locked in the same position (Figure 3b) on the materials’ surface and thus results in residual surface charge (S. Nakamura et al., 2001; Royce, 1974). Zakharov et al showed clear temperature dependence of permittivity and dielectric loss of HAp (Zakharov & Orlovskii, 2001).…”

Section: In Situ Electrical Stimulationmentioning

confidence: 99%

In situ electrical stimulation for enhanced bone growth: A mini‐review

2020

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The role of electrical stimuli in directing cellular activities during natural tissue healing and regeneration process has been well recognized. This observation has prompted the development and use of exogenous electrical stimulations in the treatment of delayed unions and non‐unions of bone fracture in different parts of the human skeletal system. Considerable amount of clinical evidences has also been generated on the benefits of exogenous bone growth stimulators. However, the clinical efficacy and safety of these exogenous electrical stimulating methods are being argued to be inconsistent and inconclusive, due to lack of sufficient number of well‐controlled, randomized clinical studies. As a result, there has been significant interest in the development of smart biomaterials, which can generate in situ electrical stimuli, for accelerated bone repair, healing and regeneration. These smart biomaterials are essentially either composite biomaterials containing electrically active materials or biomaterials that can be polarized. The primary objective of this mini review was to provide an overview of different exogenous electrical stimulation methods and biocomposites for in situ stimulation, which can be used for bone growth and healing. The first part is focused on exogenous stimulation methods, and the second part discusses the use of biocomposites containing electrically active materials such as piezoelectric materials and multiferroic materials for accelerated repair and regeneration of bone.

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Dielectric characteristics of biocompatible Ca10(PO4)6(OH)2 ceramics

Cited by 19 publications

References 4 publications

Green synthesis of magnesium ion incorporated nanocrystalline hydroxyapatite and their mechanical, dielectric and photoluminescence properties

Green synthesis of magnesium ion incorporated nanocrystalline hydroxyapatite and their mechanical, dielectric and photoluminescence properties

Hydroxyapatite‐barium titanate piezocomposites with enhanced electrical properties

In situ electrical stimulation for enhanced bone growth: A mini‐review

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