Preparation by solar physical vapor deposition (SPVD) and nanostructural study of pure and Bi doped ZnO nanopowders |
| |
| Affiliation: | 1. Laboratoire CNRS/PROMES, Odeillo 66120 Font Romeu, France;2. Département de Physique, Faculté des Sciences, Université Mouloud Mammeri, Tizi Ouzou 15000, Algeria;3. Laboratoire des Matériaux de l’ENSMP, 91003 Evry, France;4. Laboratoire SPMS, CNRS-CEA, Ecole Centrale Paris, Chatenay-Malabry, France;5. Laboratoire de physique chimie des Semiconducteurs, Université Mentouri, Constantine 25000, Algeria;1. Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan;2. Mold & Precision Machining Technology Section, Micro/Meso Mechanical Manufacturing R&D Department, Metal Industries Research & Development Centre (MIRDC), Kaohsiung 811, Taiwan;3. Department of Mold and Die Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan;1. Institute of Solid State Physics, University of Latvia, Riga, Latvia;2. Institute of Inorganic Chemistry, Riga Technical University, Latvia;3. Procédés, Matériaux et Energie Solaire CNRS, France;1. Université de Toulouse, UPS, INPT, Institut Carnot CIRIMAT, 118, route de Narbonne, F-31062 Toulouse Cedex 9, France;2. CNRS, Institut Carnot Cirimat, F-31062 Toulouse, France;1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Qianjin Street 2699, Changchun 130012, PR China;2. School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471003, PR China;3. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116023, PR China |
| |
| Abstract: | Pure and Bi doped ZnO nanopowders have been prepared by a physical vapor deposition process in a solar reactor (SPVD). From X-ray diffraction (XRD) spectra performed on initial targets and on the nanopowders obtained, the lattice parameters and the phase changes as well as the average grain sizes and the grain shape anisotropies have been determined. High Resolution Transmission Electron Microscopy (HRTEM) observations support the results. The pure ZnO nanopowders “grain size” and “grain shape anisotropy” (whiskers with an average diameter of 20–40 nm) is a function of the air pressure during the vaporisation–condensation process: the higher the pressure, the longer the whiskers. The bismuth doped ZnO nanopowders are polyphased but the ZnO based majority phases behave similarly to pure ZnO with a tendency to form whiskers but with a grain size and grain shape anisotropy decreasing when the Bi content increases.Preliminary electrical measurements at temperatures below 300 °C have shown that the ionic conductivity of the nanocomposites obtained starting from ZnO + 23 wt% Bi2O3 targets is high and promising for applications. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
