{"id":25793,"date":"2019-01-31T23:48:51","date_gmt":"2019-01-31T22:48:51","guid":{"rendered":"https:\/\/icmsva.vallealto.es\/?articulos_sci=electrical-properties-of-bismuth-ferrites-bi2fe4o9-and-bi25feo39"},"modified":"2026-04-14T11:45:27","modified_gmt":"2026-04-14T09:45:27","slug":"electrical-properties-of-bismuth-ferrites-bi2fe4o9-and-bi25feo39","status":"publish","type":"articulos_sci","link":"https:\/\/icmsva.vallealto.es\/?articulos_sci=electrical-properties-of-bismuth-ferrites-bi2fe4o9-and-bi25feo39","title":{"rendered":"Electrical properties of bismuth ferrites: Bi2Fe4O9 and Bi25FeO39"},"content":{"rendered":"<figure><img decoding=\"async\" src=\"https:\/\/icmsva.vallealto.es\/wp-content\/uploads\/2019\/01\/Electrical-properties-of-bismuth-ferrites-Bi2Fe4O-1.png\" alt=\"Electrical properties of bismuth ferrites: Bi2Fe4O9 and Bi25FeO39\" \/><\/figure>\n<p>Bi2Fe4O9 was prepared by solid-state reaction and the electrical properties measured by impedance spectroscopy. After annealing in O-2 at 900 degrees C, Bi2Fe4O9 is an electrically-homogeneous insulator. Its high frequency permittivity is constant (similar to 14.1) over the temperature range 300-400 degrees C and shows no evidence of incipient ferroelectricity at lower temperatures. On annealing in N-2 at 900 degrees C, the pellets gradually decompose.<br \/>\nBi25FeO39 was prepared by both solid-state reaction and mechanosynthesis. It showed a modest amount of mixed conduction of both oxide ions and holes. Impedance analysis showed a complex response that best fitted an equivalent circuit consisting of a parallel combination of long-range conduction and short range dielectric relaxation elements.<br \/>\nThe electrical conductivity of both Bi-2 Fe4O9 and Bi25FeO39 is less than that of BiFeO3 prepared by solid-state reaction, which indicates that any leakage conductivity of BiFeO3 is not due to the possible presence of small amounts of these secondary phases.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bi2Fe4O9 was prepared by solid-state reaction and the electrical properties measured by impedance spectroscopy. After annealing in O-2 at 900 degrees C, Bi2Fe4O9 is an electrically-homogeneous insulator. Its high frequency permittivity is constant (similar to 14.1) over the temperature range 300-400 degrees C and shows no evidence of incipient ferroelectricity at lower temperatures. On annealing&hellip;<\/p>\n","protected":false},"featured_media":25797,"template":"","autores":[],"grupos_de_investigacion":[139],"revistas":[1015],"anos":[886],"class_list":["post-25793","articulos_sci","type-articulos_sci","status-publish","has-post-thumbnail","hentry","grupos_de_investigacion-reactividad-de-solidos","revistas-journal-of-the-european-ceramic-society","anos-886","description-off"],"acf":[],"_links":{"self":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/25793","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci"}],"about":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/types\/articulos_sci"}],"version-history":[{"count":1,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/25793\/revisions"}],"predecessor-version":[{"id":25798,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/25793\/revisions\/25798"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/media\/25797"}],"wp:attachment":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=25793"}],"wp:term":[{"taxonomy":"autores","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fautores&post=25793"},{"taxonomy":"grupos_de_investigacion","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fgrupos_de_investigacion&post=25793"},{"taxonomy":"revistas","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Frevistas&post=25793"},{"taxonomy":"anos","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fanos&post=25793"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}