Study of new relaxor materials in BaTiO3BaZrO3La2/3TiO3 system
| hal.structure.identifier | Laboratoire de Cristallographie Thermodynamique | |
| dc.contributor.author | ALIOUANE, K. | |
| hal.structure.identifier | Laboratoire de Cristallographie Thermodynamique | |
| dc.contributor.author | GUEHRIA-LAIDOUDI, A. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | SIMON, Annie | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | RAVEZ, Jean | |
| dc.date.issued | 2005 | |
| dc.identifier.issn | 1293-2558 | |
| dc.description.abstractEn | Dielectric studies were performed on new lead-free ceramics derived from BaTiO3 by iso-valent and off-valent substitutions in both octahedral and dodecahedral sites and having the compositions (Ba1−xLa2x/3)(Ti1−yZry)O3, with 0 < x < 0.35 and 0 < y < 0.35. The dielectric permittivities of samples measured as a function of temperature and frequency showed relaxor or classical transition phase. The classical ferroelectric behaviour is exhibited by compositions close to the binary systems BaTiO3–La2/3TiO3 (BT–LT) or BaTiO3–BaZrO3 (BT–BZ), as long as the substitution rates remained small (x <0.15 and y <0.30). The relaxor behaviour occurred in compositions BT–LT, BT–BZ and BT–LT–BZ which deviated strongly from BaTiO3. The values of peak temperature TC (or Tm) decreased with increasing x and/or y, being less sensitive to y variations than that of x. In the relaxor zone, the decreasing of Tm is accompanied with an increasing of the characteristic ΔTm, in BT–LT (x < 0.15) and BT–LT–BZ (x = 0.10; 0.05 < y < 0.35) solid solutions. For the best relaxor material of composition (Ba0.90La0.2/3)(Ti0.95Zr0.05)O3, the dielectric constant (ε'r ) and the peak temperature Tm exhibited interesting values (22 000 and 200 K, respectively) if compared to other similar perovskite-like materials. Moreover, such ceramics are lead-free and could fit to environmental friendly requirements in the case of applications. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Ceramic | |
| dc.subject.en | Ferroelectrics | |
| dc.subject.en | Lead-free relaxors | |
| dc.subject.en | Off-valent substitution | |
| dc.subject.en | A-site deficient perovskite | |
| dc.title.en | Study of new relaxor materials in BaTiO3BaZrO3La2/3TiO3 system | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.solidstatesciences.2005.06.010 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Solid State Sciences | |
| bordeaux.page | p. 1324-1332 | |
| bordeaux.volume | vol. 7, n° 11 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00019051 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Non spécifiée | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00019051v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Solid%20State%20Sciences&rft.date=2005&rft.volume=vol.%207,%20n%C2%B0%2011&rft.spage=p.%201324-1332&rft.epage=p.%201324-1332&rft.eissn=1293-2558&rft.issn=1293-2558&rft.au=ALIOUANE,%20K.&GUEHRIA-LAIDOUDI,%20A.&SIMON,%20Annie&RAVEZ,%20Jean&rft.genre=article |
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