Synthesis of CuAlO2 from chemically precipitated nano-sized precursors
| dc.contributor.author | Akyıldız, Hasan | |
| dc.date.accessioned | 2020-03-26T19:07:16Z | |
| dc.date.available | 2020-03-26T19:07:16Z | |
| dc.date.issued | 2015 | |
| dc.department | Selçuk Üniversitesi | en_US |
| dc.description.abstract | A study was carried out on the synthesis of CuAlO2 at temperatures below 1000 degrees C, using a simple approach based on mechanical mixing of chemically precipitated CuO and Al(OH)(3) nanoparticles. Synthesis of precursor powders was achieved at low temperatures (<100 degrees C) via precipitation from their corresponding aqueous solutions. After drying at room temperature, precursors were mixed in equimolar ratios by a combination of ball milling and sonication. Green pellets were obtained by filtration casting of the mixed powder slurry followed by dry compaction. X-ray diffraction study showed that the single phase CuAlO2 samples with high crystallinity formed only after 5 h of firing at 900 degrees C under flowing nitrogen. Electron microscopy images revealed a loosely packed microstructure with high surface area consisting of nanosized grains after the heat treatment. The achieved relative density was 45% of the theoretical density. The crystallite size was estimated to be 39 nm and the specific surface area of the sintered sample was measured as 9.67 m(2)/g. The bandgap was calculated as 3.07 eV with a transmittance of 60% in the visible region. The measured electrical conductivity was 4 x 10(-3) mS/cm at room temperature and showed an increase with increasing measurement temperature, which indicates semiconducting behavior. The conductivity was shown to increase by an order of magnitude with a higher degree of densification by sintering at 1150 degrees C. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved. | en_US |
| dc.description.sponsorship | Scientific Research Foundation (BAP) of Selcuk UniversitySelcuk University [13401016] | en_US |
| dc.description.sponsorship | Funding from the Scientific Research Foundation (BAP) of Selcuk University (Project no 13401016), is greatly appreciated. I would also like to thank Dr. M. Seymen Aygiin and Dr. Volkan Kalem for usefull discussions. | en_US |
| dc.identifier.doi | 10.1016/j.ceramint.2015.07.031 | en_US |
| dc.identifier.endpage | 14115 | en_US |
| dc.identifier.issn | 0272-8842 | en_US |
| dc.identifier.issn | 1873-3956 | en_US |
| dc.identifier.issue | 10 | en_US |
| dc.identifier.scopusquality | Q1 | en_US |
| dc.identifier.startpage | 14108 | en_US |
| dc.identifier.uri | https://dx.doi.org/10.1016/j.ceramint.2015.07.031 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.12395/32597 | |
| dc.identifier.volume | 41 | en_US |
| dc.identifier.wos | WOS:000362919900021 | en_US |
| dc.identifier.wosquality | Q1 | en_US |
| dc.indekslendigikaynak | Web of Science | en_US |
| dc.indekslendigikaynak | Scopus | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | ELSEVIER SCI LTD | en_US |
| dc.relation.ispartof | CERAMICS INTERNATIONAL | en_US |
| dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
| dc.rights | info:eu-repo/semantics/closedAccess | en_US |
| dc.selcuk | 20240510_oaig | en_US |
| dc.subject | Mixing | en_US |
| dc.subject | Firing | en_US |
| dc.subject | Functional applications | en_US |
| dc.subject | CuAlO2 | en_US |
| dc.title | Synthesis of CuAlO2 from chemically precipitated nano-sized precursors | en_US |
| dc.type | Article | en_US |
