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Title:Efekt PTKU v močno donorsko dopirani keramiki ▫$BaTiO_3$▫
Authors:ID Ule, Nina (Author)
ID Makovec, Darko (Author)
ID Drofenik, Mihael (Author)
ID Inštitut za kovinske materiale in tehnologije (Copyright holder)
Files:.pdf Materiali_in_tehnologije_2000_Ule,_Makovec,_Drofenik_Efekt_PTKU_v_mocno_donorsko_dopirani_keramiki_BaTiOspodaj3.pdf (344,81 KB)
MD5: 1DF0245F16D32E8564B5EDA3C1F89AF4
PID: 20.500.12556/dkum/50396fc0-5aae-4e6f-b8e6-3b054e480dc5
 
URL http://mit.imt.si/Revija/izvodi/mit005/ule.pdf
 
Language:Slovenian
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract: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.
Keywords:polprevodni ▫$BaTiO_3$▫, donorsko dopiranje, električne lastnosti, PTKU-efekt, mikrostruktura
Publication status:Published
Publication version:Version of Record
Year of publishing:2000
Number of pages:str. 275-278
Numbering:Letn. 34, št. 5
PID:20.500.12556/DKUM-67030 New window
ISSN:1580-2949
UDC:666.3/.7:621.316.8:537.311.3
ISSN on article:1580-2949
COBISS.SI-ID:236458 New window
NUK URN:URN:SI:UM:DK:D8TG5GHC
Publication date in DKUM:27.07.2017
Views:1290
Downloads:122
Metadata:XML DC-XML DC-RDF
Categories:Misc.
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Record is a part of a journal

Title:Materiali in tehnologije
Shortened title:Mater. tehnol.
Publisher:Inštitut za kovinske materiale in tehnologije
ISSN:1580-2949
COBISS.SI-ID:106193664 New window

Secondary language

Language:English
Title:PTCR effect in highly donor-doped ▫$BaTiO_3$▫ ceramics
Abstract: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.
Keywords:semiconducting ▫$BaTiO_3$▫, donor doped, electrical properties, PTCR effect, microstructure


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