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Description
  • Pórovité keramické materiály mohou být vlivem působení obyčejné atmosférické vlhkosti nestabilní. Nekrystalická fáze keramiky může totiž nehydratovat, tj. dochází k chemisorpci vody. Tento proces je doprovázen zvětšením objemu, které nazýváme nevratná vlhkostní roztažnost, protože není vratná za normálních podmínek. Velikost NVR závisí na několika faktorech, je to zejména surovina a technologie výpalu. Velikost nevratné vlhkostní roztažnosti může být stanovena i na malých vzorcích použitím teplotního dilatometru, který je použit pro jeden vzorek opakovaně v několika krocích. (cs)
  • Porous fired clay materials could be instable due to invoke of common atmospheric relative humidity. The non-crystalline phase of ceramic body could re-hydrate, i.e., a chemi-sorption of water occurs. This process is accompanied by spontaneous increasing of volume which is called irreversible moisture expansion, because it is not reversible under common conditions. Value of moisture expansion depends on several factors, mainly on raw material and technology of firing procedure. The value of moisture expansion could be determined on small specimen of ceramic by thermal dilatometer witch is used for one sample in several stages more times.
  • Porous fired clay materials could be instable due to invoke of common atmospheric relative humidity. The non-crystalline phase of ceramic body could re-hydrate, i.e., a chemi-sorption of water occurs. This process is accompanied by spontaneous increasing of volume which is called irreversible moisture expansion, because it is not reversible under common conditions. Value of moisture expansion depends on several factors, mainly on raw material and technology of firing procedure. The value of moisture expansion could be determined on small specimen of ceramic by thermal dilatometer witch is used for one sample in several stages more times. (en)
Title
  • Irreversible moisture expansion of porous ceramic and its determination by thermal dilatometer
  • Irreversible moisture expansion of porous ceramic and its determination by thermal dilatometer (en)
  • Nevratná vlhkostní roztažnost a její stanovení teplotním dilatometrem (cs)
skos:prefLabel
  • Irreversible moisture expansion of porous ceramic and its determination by thermal dilatometer
  • Irreversible moisture expansion of porous ceramic and its determination by thermal dilatometer (en)
  • Nevratná vlhkostní roztažnost a její stanovení teplotním dilatometrem (cs)
skos:notation
  • RIV/68407700:21610/08:07152213!RIV09-GA0-21610___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA103/07/1082), P(GP103/08/P608)
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  • 373329
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  • RIV/68407700:21610/08:07152213
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  • ceramic; moisture expansion; porous ceramic (en)
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  • [B58F0F5B3F42]
http://linked.open...v/mistoKonaniAkce
  • Liblice
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  • Praha
http://linked.open...i/riv/nazevZdroje
  • New trends in experimental methods together with advanced numerical modelling
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
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http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Vokáč, Miroslav
  • Bouška, Petr
  • Hanykýř, V.
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http://linked.open.../riv/zahajeniAkce
number of pages
http://purl.org/ne...btex#hasPublisher
  • České vysoké učení technické v Praze. Fakulta dopravní
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  • 978-80-86246-34-5
http://localhost/t...ganizacniJednotka
  • 21610
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