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| rdf:type
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| Description
| - Koeficinty difúze vodíku v Mg2NiH4 byly měřeny volumetrickou metodou v teplotním rozsahu 449 - 576 K. Experimentální materiál byl připraven dvěma způsoby: tavením a odlitím a kulovým mletím a zkompaktováním do tablet. Navodíkování proběhlo z plynné fáze vodíku za zvýšeného tlaku a teploty. Tablety byly navodíkovány ve dvou režimech, následkem čehož vznikl buď vysoký podíl dvojčatové nízkoteplotní fáze LT2 nebo nízký podíl LT2. Bylo pozorováno, že LT2 výrazně snižuje rychlost desorpce vodíku. Aktivační entalpie difúze vodíku ve vysokoteplotní fázi (na přechodovou teplotou Ttr=508 K) je přibližně poloviční než hodnota získaná pro nízkoteplotní oblast. Koeficienty difúze vodíku v nízkoteplotní nedvojčatové fázi LT1 jsou asi 20-ti násobně vyšší než hodnoty pro dvojčatovou fázi LT2. (cs)
- Coefficients of hydrogen diffusion in Mg2NiH4 were measured by a volumetric method at temperatures ranging from 449 to 576 K. Experimental material was prepared in two ways: by melting and casting, and by ball-milling and compacting into pellets. Hydrogen charging was performed from the hydrogen gas phase at elevated pressure and temperature. Pellets were charged in two different modes, resulting in structures with either a high fraction of twinned low-temperature phase LT2 or a low fraction of LT2. It was observed that LT2 considerably slowed down the hydrogen desorption rate. Activation enthalpy of hydrogen diffusion in high-temperature phase (above transition temperature Ttr=508 K) is approximately half of the value obtained for the low-temperature region. Coefficients of hydrogen diffusion in low-temperature un-twinned phase LT1 are by a multiplication factor of about 20 higher than those of the twinned phase LT2.
- Coefficients of hydrogen diffusion in Mg2NiH4 were measured by a volumetric method at temperatures ranging from 449 to 576 K. Experimental material was prepared in two ways: by melting and casting, and by ball-milling and compacting into pellets. Hydrogen charging was performed from the hydrogen gas phase at elevated pressure and temperature. Pellets were charged in two different modes, resulting in structures with either a high fraction of twinned low-temperature phase LT2 or a low fraction of LT2. It was observed that LT2 considerably slowed down the hydrogen desorption rate. Activation enthalpy of hydrogen diffusion in high-temperature phase (above transition temperature Ttr=508 K) is approximately half of the value obtained for the low-temperature region. Coefficients of hydrogen diffusion in low-temperature un-twinned phase LT1 are by a multiplication factor of about 20 higher than those of the twinned phase LT2. (en)
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| Title
| - Hydrogen diffusion in Mg2NiH4 intermetallic compound
- Hydrogen diffusion in Mg2NiH4 intermetallic compound (en)
- Difúze vodíku v intermetalické sloučenině Mg2NiH4 (cs)
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| skos:prefLabel
| - Hydrogen diffusion in Mg2NiH4 intermetallic compound
- Hydrogen diffusion in Mg2NiH4 intermetallic compound (en)
- Difúze vodíku v intermetalické sloučenině Mg2NiH4 (cs)
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| skos:notation
| - RIV/68081723:_____/08:00305863!RIV08-AV0-68081723
|
| http://linked.open.../vavai/riv/strany
| |
| http://linked.open...avai/riv/aktivita
| |
| http://linked.open...avai/riv/aktivity
| - P(GA106/07/0010), Z(AV0Z20410507)
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| http://linked.open...iv/cisloPeriodika
| |
| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
| |
| http://linked.open.../riv/druhVysledku
| |
| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/68081723:_____/08:00305863
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| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - diffusion; hydrogen storage; phase transformations (en)
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| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| - GB - Spojené království Velké Británie a Severního Irska
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| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
| |
| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...v/svazekPeriodika
| |
| http://linked.open...iv/tvurceVysledku
| - David, Bohumil
- Král, Lubomír
- Čermák, Jiří
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| http://linked.open...n/vavai/riv/zamer
| |
| issn
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| number of pages
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| is http://linked.open...avai/riv/vysledek
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