Jožef Stefan Institute, Lj. (IJS)
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Študij citratno-nitratnih gelov za pripravo keramike na osnovi ▫$LaCrO_3▫$ = Study of citrate-nitrate gels for ▫$LaCrO_3▫$ based ceramics preparationZupan, Klementina ; Kolar, DragoLantanov kromit sodi med najobetavnejše visokotemperaturne materiale. Uporablja se lahko kot elektroda ali vmesnik v gorivnih celicah s trdnim elektrolitom ter kot grelni element ali obloga v ... visokotemperaturnih pečeh zaradi svoje obstojnosti pri visokih temperaturah in električnih lastnosti. Materiale na osnovi ▫$LaCrO_3$▫ smo pripravljali z zgorevalno sintezo citratno-nitratnih gelov. Zaradi nekoliko manj eksotermne reakcije, kot so reakcije eksplozivnih mešanic npr. v sistemih glicin nitrat ali urea nitrat, lahko pri tej sintezi uporabljamo preprosto laboratorijsko steklovino, brez težav pa je mogoče pripraviti tudi nekaj deset gramov produkta. Sintezni postopek smo modificirali s sušenjem gelov pri znižani temperaturi (60°C) in nižjem tlaku. Na potek sinteze in s tem na lastnosti končnih produktov smo vplivali s spreminjanjem molskega razmerja med citronsko kislino in nitratnimi ioni. Tako pripravljene prahove čistega lantanovega kromita in lantanovega kromita, dopiranega s kalcijem, smo karakterizirali z rentgensko praškovno analizo, elektronsko mikroskopijo in termično analizo. Ugotovili smo, da zniževanje molskega razmerja citrat/nitrat pod stehiometrijsko razmerje omogoča popolnejše zgorevanje gelov.Source: Kovine zlitine tehnologije = Metals alloys technologies. - ISSN 1318-0010 (Let. 32, št. 5, 1998, str. 355-358)Type of material - article, component partPublish date - 1998Language - slovenianCOBISS.SI-ID - 82090
Author
Zupan, Klementina |
Kolar, Drago
Topics
lantanov kromit |
zgorevalna sinteza |
termična analiza |
lanthanum chromite |
combustion synthesis |
thermal analysis
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source: Kovine zlitine tehnologije = Metals alloys technologies. - ISSN 1318-0010 (Let. 32, št. 5, 1998, str. 355-358)
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Database name | Field | Year |
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Zupan, Klementina | 07557 |
Kolar, Drago | 00066 |
Source: Personal bibliographies
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