Secondary thermal treatment effect on PTCR BaTiO3
The effect of secondary thermal treatments (450-650 C/10-30 min) on previously processed PTCR BaTiO3 samples was found to decrease the room temperature resistivity by 0.5 to 3 orders and enhance the PTCR jump accordingly. It is proposed that a strong internal stress exists near grain boundaries in m...
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| Veröffentlicht in: | Journal of materials science letters 1999, Vol.18 (22), p.1875-1878 |
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| container_end_page | 1878 |
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| container_issue | 22 |
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| container_title | Journal of materials science letters |
| container_volume | 18 |
| creator | GAOSHENG LIU ROSEMAN, R. D |
| description | The effect of secondary thermal treatments (450-650 C/10-30 min) on previously processed PTCR BaTiO3 samples was found to decrease the room temperature resistivity by 0.5 to 3 orders and enhance the PTCR jump accordingly. It is proposed that a strong internal stress exists near grain boundaries in modified barium titanate, which originates from the interaction between the elastic dipoles and spontaneous polarisation. Secondary thermal treatments result in a relief in the internal stress through the reorientation of oxygen vacancies, leading to more directional domain alignment, thereby more effective compensation to the electrical potential barrier. 16 refs. |
| doi_str_mv | 10.1023/A:1006676028662 |
| format | Article |
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| fulltext | fulltext |
| identifier | ISSN: 0261-8028 |
| ispartof | Journal of materials science letters, 1999, Vol.18 (22), p.1875-1878 |
| issn | 0261-8028 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_27123560 |
| source | Alma/SFX Local Collection |
| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Conductivity phenomena in semiconductors and insulators Electronic transport in condensed matter Exact sciences and technology Low-field transport and mobility piezoresistance Physics |
| title | Secondary thermal treatment effect on PTCR BaTiO3 |
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