Oxygen diffusion in Bi2O3-doped ZnO
In order to clarify the influence of Bi-doping on oxygen diffusion in ZnO, the bulk and grain boundary oxygen diffusion coefficients were measured in Bi2O3-doped ZnO polycrystals by means of the gas-solid exchange method using the isotope 18O as the oxygen tracer. The experiments were performed on Z...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2008-06-01
|
| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392008000200019 |
| _version_ | 1818959231467913216 |
|---|---|
| author | Antônio Claret Soares Sabioni Antônio Márcio J.M. Daniel Wilmar Barbosa Ferraz Rafael Witter Dias Pais Anne-Marie Huntz François Jomard |
| author_facet | Antônio Claret Soares Sabioni Antônio Márcio J.M. Daniel Wilmar Barbosa Ferraz Rafael Witter Dias Pais Anne-Marie Huntz François Jomard |
| author_sort | Antônio Claret Soares Sabioni |
| collection | DOAJ |
| description | In order to clarify the influence of Bi-doping on oxygen diffusion in ZnO, the bulk and grain boundary oxygen diffusion coefficients were measured in Bi2O3-doped ZnO polycrystals by means of the gas-solid exchange method using the isotope 18O as the oxygen tracer. The experiments were performed on ZnO sintered samples containing 0.1, 0.3 and 0.5 mol% Bi2O3. The diffusion annealings were performed at 942, 1000 and 1092 °C, in an Ar+18O2 atmosphere under an oxygen partial pressure of 0.2 atm. After the diffusion annealings, the 18O diffusion profiles were established by secondary ion mass spectrometry (SIMS). The results show an increase in the oxygen diffusion in the Bi2O3-doped ZnO, when compared to the oxygen diffusion in the undoped ZnO polycrystal under the same experimental conditions, both in bulk and in grain-boundaries. Moreover, it was observed that the higher the Bi2O3 concentration, the higher the oxygen diffusion. These results suggest that the incorporation of Bi2O3 increases the interstitial oxygen concentration which agrees with an interstitial diffusion mechanism both in bulk and in grain-boundaries. |
| first_indexed | 2024-12-20T11:38:21Z |
| format | Article |
| id | doaj.art-89451c0027f642568727d1616e5d9b02 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-20T11:38:21Z |
| publishDate | 2008-06-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-89451c0027f642568727d1616e5d9b022022-12-21T19:42:04ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392008-06-0111222122510.1590/S1516-14392008000200019Oxygen diffusion in Bi2O3-doped ZnOAntônio Claret Soares SabioniAntônio Márcio J.M. DanielWilmar Barbosa FerrazRafael Witter Dias PaisAnne-Marie HuntzFrançois JomardIn order to clarify the influence of Bi-doping on oxygen diffusion in ZnO, the bulk and grain boundary oxygen diffusion coefficients were measured in Bi2O3-doped ZnO polycrystals by means of the gas-solid exchange method using the isotope 18O as the oxygen tracer. The experiments were performed on ZnO sintered samples containing 0.1, 0.3 and 0.5 mol% Bi2O3. The diffusion annealings were performed at 942, 1000 and 1092 °C, in an Ar+18O2 atmosphere under an oxygen partial pressure of 0.2 atm. After the diffusion annealings, the 18O diffusion profiles were established by secondary ion mass spectrometry (SIMS). The results show an increase in the oxygen diffusion in the Bi2O3-doped ZnO, when compared to the oxygen diffusion in the undoped ZnO polycrystal under the same experimental conditions, both in bulk and in grain-boundaries. Moreover, it was observed that the higher the Bi2O3 concentration, the higher the oxygen diffusion. These results suggest that the incorporation of Bi2O3 increases the interstitial oxygen concentration which agrees with an interstitial diffusion mechanism both in bulk and in grain-boundaries.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392008000200019oxygen diffusionBi2O3-doped ZnObulk diffusiongrain boundary diffusion |
| spellingShingle | Antônio Claret Soares Sabioni Antônio Márcio J.M. Daniel Wilmar Barbosa Ferraz Rafael Witter Dias Pais Anne-Marie Huntz François Jomard Oxygen diffusion in Bi2O3-doped ZnO Materials Research oxygen diffusion Bi2O3-doped ZnO bulk diffusion grain boundary diffusion |
| title | Oxygen diffusion in Bi2O3-doped ZnO |
| title_full | Oxygen diffusion in Bi2O3-doped ZnO |
| title_fullStr | Oxygen diffusion in Bi2O3-doped ZnO |
| title_full_unstemmed | Oxygen diffusion in Bi2O3-doped ZnO |
| title_short | Oxygen diffusion in Bi2O3-doped ZnO |
| title_sort | oxygen diffusion in bi2o3 doped zno |
| topic | oxygen diffusion Bi2O3-doped ZnO bulk diffusion grain boundary diffusion |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392008000200019 |
| work_keys_str_mv | AT antonioclaretsoaressabioni oxygendiffusioninbi2o3dopedzno AT antoniomarciojmdaniel oxygendiffusioninbi2o3dopedzno AT wilmarbarbosaferraz oxygendiffusioninbi2o3dopedzno AT rafaelwitterdiaspais oxygendiffusioninbi2o3dopedzno AT annemariehuntz oxygendiffusioninbi2o3dopedzno AT francoisjomard oxygendiffusioninbi2o3dopedzno |