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Efekt PTKU v močno donorsko dopirani keramiki ▫$BaTiO_3$▫ = PTCR effect in highly donor-doped ▫$BaTiO_3$▫ ceramicsUle, Nina ; Makovec, Darko ; Drofenik, MihaelNavadno 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.Source: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 34, št. 5, 2000, str. 275-278)Type of material - article, component part ; adult, seriousPublish date - 2000Language - slovenianCOBISS.SI-ID - 236458
source: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 34, št. 5, 2000, str. 275-278)
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Ule, Nina | 19940 |
Makovec, Darko | 10372 |
Drofenik, Mihael | 01360 |
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and: SICRIS
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