{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-JCD6QBVS/8c9625c2-1414-4d77-8a09-eb916453d716/HTML","dcterms:extent":"17 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-JCD6QBVS/18a80654-3c28-4511-856f-f6dabad86a01/PDF","dcterms:extent":"344 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-JCD6QBVS/ffdea712-f58a-44be-a706-944a692a2caa/TEXT","dcterms:extent":"16 KB"}],"edm:TimeSpan":{"@rdf:about":"2000-2024","edm:begin":{"@xml:lang":"en","#text":"2000"},"edm:end":{"@xml:lang":"en","#text":"2024"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:DOC-JCD6QBVS","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/urn:nbn:si:spr-ihg6vo21"},{"@xml:lang":"sl","#text":"Materiali in tehnologije"}],"dcterms:issued":"2000","dc:creator":["Drofenik, Mihael","Makovec, Darko","Ule, Nina"],"dc:format":[{"@xml:lang":"sl","#text":"letnik:34"},{"@xml:lang":"sl","#text":"4 strani"},{"@xml:lang":"sl","#text":"številka:5"},{"@xml:lang":"sl","#text":"str. 275-278"}],"dc:identifier":["ISSN:1580-2949","COBISSID:236458","URN:URN:NBN:SI:doc-JCD6QBVS"],"dc:language":"sl","dc:publisher":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"dc:subject":[{"@xml:lang":"sl","#text":"barijev titanat"},{"@xml:lang":"en","#text":"ceramic"},{"@xml:lang":"sl","#text":"električne lastnosti"},{"@xml:lang":"sl","#text":"keramika"},{"@xml:lang":"sl","#text":"mikrostruktura"},{"@rdf:resource":"http://www.wikidata.org/entity/Q45621"}],"dcterms:temporal":{"@rdf:resource":"2000-2024"},"dc:title":{"@xml:lang":"sl","#text":"Efekt PTKU v močno donorsko dopirani keramiki BaTiO3| PTCR effect in highly donor-doped BaTiO3 ceramics|"},"dc:description":[{"@xml:lang":"sl","#text":"PTC resistors are normally produced by sintering donor-doped ?$BaTiO_3$? in air. The concentration of donor must be lower than a critical value (0,3 mol.%in air), which blocks the grain growth during sintering. The critical donor concentration can be significantly increased by sintering in a reducing atmosphere.In this way, a coarse-grained, highly donor-doped ?$BaTiO_3$? may be obtained. In such ceramics the PTCR effect can be developed by annealing in air. In the present work the PTCR effect in ?$BaTiO_3$? ceramics, doped with La from 0 to 20 mol.% has been studied. The samples were sintered in a reducing mixture of ?$N_2$? containing 1 % of ?$H_2$? and subsequently reoxidized by annealing in air"},{"@xml:lang":"sl","#text":"Navadno izdelujejo upore s pozitivnim temperaturnim koeficientom upornosti (PTK-upore) s sintranjem nizko donorsko dopiranega ?$BaTiO_3$? na zraku. Koncentracija donorja ne sme preseči kritične velikosti (-0,3 mol.% med sintranjem na zraku), ki povzroči zaustavitev pretirane rasti zrn med sintranjem. S sintranjem v redukcijski atmosferi lahko povišamo kritično koncentracijo donorja, in tako dobimo močno donorsko dopiran ?$BaTiO_3$? z grobo zrnato mikrostrukturo. V grobo zrnatem ?$BaTiO_3$? lahko s poznejšo reoksidacijo z žganjem na zraku uravnavamo PTKU-efekt. V tem delu so predstavljeni rezultati raziskave PTKU-efekta v keramikah ?$BaTiO_3$?, dopiranih s koncentracijami La od o do 20 ml.%. Vzorci so bili sintrani v redukcijski mešanici ?$N_2$? z 1 % ?$H_2$? in pozneje reoksidirani z žganjem na zraku"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:DOC-JCD6QBVS","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-JCD6QBVS"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-JCD6QBVS/18a80654-3c28-4511-856f-f6dabad86a01/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:DOC-JCD6QBVS/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-JCD6QBVS"}}}}