Enhanced high-temperature electrical response of hydroxyapatite upon grain size refinement
Abstract
Correlation between high-temperature electrical response and microstructural properties of dense hydroxyapatite with average grain size from micrometer to nanometer level in heating/cooling cycle was investigated. Grain interior and grain boundary contributions to overall conductivity were determined. Nanostructured hydroxyapatite exhibited enhanced grain interior conductivity, with significantly higher activation energy (∼2.4 eV) than that of coarsed microstructures (∼1.7 eV). This difference in activation energies is explained by the possible influence of dehydroxylation during materials fabrication procedure, which affected the amount of OH- ions as the main charge carriers. Grain boundary conductivity was similar for all microstructures, with activation energy above ∼2 eV, implying the OH- ions migration across grain boundaries. Electrical response in cooling cycle confirmed the trends found during heating. © 2014 Elsevier B.V. All rights reserved.
Source:
Materials Research Bulletin, 2015, 61, 534-538Publisher:
- Elsevier
Funding / projects:
DOI: 10.1016/j.materresbull.2014.10.072
ISSN: 0025-5408
WoS: 000347498700084
Scopus: 2-s2.0-84909644161
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Lukić, Miodrag J. AU - Jovalekić, Čedomir AU - Marković, Smilja AU - Uskoković, Dragan PY - 2015 UR - https://dais.sanu.ac.rs/123456789/3548 AB - Correlation between high-temperature electrical response and microstructural properties of dense hydroxyapatite with average grain size from micrometer to nanometer level in heating/cooling cycle was investigated. Grain interior and grain boundary contributions to overall conductivity were determined. Nanostructured hydroxyapatite exhibited enhanced grain interior conductivity, with significantly higher activation energy (∼2.4 eV) than that of coarsed microstructures (∼1.7 eV). This difference in activation energies is explained by the possible influence of dehydroxylation during materials fabrication procedure, which affected the amount of OH- ions as the main charge carriers. Grain boundary conductivity was similar for all microstructures, with activation energy above ∼2 eV, implying the OH- ions migration across grain boundaries. Electrical response in cooling cycle confirmed the trends found during heating. © 2014 Elsevier B.V. All rights reserved. PB - Elsevier T2 - Materials Research Bulletin T1 - Enhanced high-temperature electrical response of hydroxyapatite upon grain size refinement SP - 534 EP - 538 VL - 61 DO - 10.1016/j.materresbull.2014.10.072 UR - https://hdl.handle.net/21.15107/rcub_dais_3548 ER -
@article{ author = "Lukić, Miodrag J. and Jovalekić, Čedomir and Marković, Smilja and Uskoković, Dragan", year = "2015", abstract = "Correlation between high-temperature electrical response and microstructural properties of dense hydroxyapatite with average grain size from micrometer to nanometer level in heating/cooling cycle was investigated. Grain interior and grain boundary contributions to overall conductivity were determined. Nanostructured hydroxyapatite exhibited enhanced grain interior conductivity, with significantly higher activation energy (∼2.4 eV) than that of coarsed microstructures (∼1.7 eV). This difference in activation energies is explained by the possible influence of dehydroxylation during materials fabrication procedure, which affected the amount of OH- ions as the main charge carriers. Grain boundary conductivity was similar for all microstructures, with activation energy above ∼2 eV, implying the OH- ions migration across grain boundaries. Electrical response in cooling cycle confirmed the trends found during heating. © 2014 Elsevier B.V. All rights reserved.", publisher = "Elsevier", journal = "Materials Research Bulletin", title = "Enhanced high-temperature electrical response of hydroxyapatite upon grain size refinement", pages = "534-538", volume = "61", doi = "10.1016/j.materresbull.2014.10.072", url = "https://hdl.handle.net/21.15107/rcub_dais_3548" }
Lukić, M. J., Jovalekić, Č., Marković, S.,& Uskoković, D.. (2015). Enhanced high-temperature electrical response of hydroxyapatite upon grain size refinement. in Materials Research Bulletin Elsevier., 61, 534-538. https://doi.org/10.1016/j.materresbull.2014.10.072 https://hdl.handle.net/21.15107/rcub_dais_3548
Lukić MJ, Jovalekić Č, Marković S, Uskoković D. Enhanced high-temperature electrical response of hydroxyapatite upon grain size refinement. in Materials Research Bulletin. 2015;61:534-538. doi:10.1016/j.materresbull.2014.10.072 https://hdl.handle.net/21.15107/rcub_dais_3548 .
Lukić, Miodrag J., Jovalekić, Čedomir, Marković, Smilja, Uskoković, Dragan, "Enhanced high-temperature electrical response of hydroxyapatite upon grain size refinement" in Materials Research Bulletin, 61 (2015):534-538, https://doi.org/10.1016/j.materresbull.2014.10.072 ., https://hdl.handle.net/21.15107/rcub_dais_3548 .