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| Description
| - %22Selective leaching is process used mainly in analytical praxis - alloy matrix is dissolved and the residuum can be study by different methods. In this article, modification of selective leaching determined for production of metallic nanoparticles is described. Selective leaching technique lays in preparation of supersaturated solid solution of desired element in matrix metal - by convenient heat treatment or by rapid solidification of the binary alloy. Consequently, the matrix metal is selectively dissolved and metal nanoparticles from other metal are formed. The size, shape and agglomeration of forming metallic nanoparticles are dependent on many factors such as reaction temperature, concentration of leaching solution, additives present in leaching solution. The metal mainly used as matrix component is aluminium due to is amphoteric behaviour. It enables aluminium dissolution in sodium hydroxide without affecting the minor metal. Nobel metals like silver or copper forms monocrystalline nanoparticles and their size is dependent on temperature (increasing with increasing temperature). Nickel forms polycrystalline sub-micrometer particles, that grain size is dependent on temperature. As prepared nanoparticles exhibit massive agglomeration. It is not limitation of the process, because the application of nanoparticles is as a precursor for bottom-up processing of bulk nanocrystalline materials (metals, alloys and metal matrix composites). Compaction of nanoparticles prepared by selective leaching is possible by several methods. The most suitable seems to be spark plasma sintering which enables to obtain extremely high heating rates and the thermal exposure of material is as short as necessary. This prevents the unwanted grain coarsening of compacted material and helps to keep superior properties of bulk nanocrystalline metals.%22
- %22Selective leaching is process used mainly in analytical praxis - alloy matrix is dissolved and the residuum can be study by different methods. In this article, modification of selective leaching determined for production of metallic nanoparticles is described. Selective leaching technique lays in preparation of supersaturated solid solution of desired element in matrix metal - by convenient heat treatment or by rapid solidification of the binary alloy. Consequently, the matrix metal is selectively dissolved and metal nanoparticles from other metal are formed. The size, shape and agglomeration of forming metallic nanoparticles are dependent on many factors such as reaction temperature, concentration of leaching solution, additives present in leaching solution. The metal mainly used as matrix component is aluminium due to is amphoteric behaviour. It enables aluminium dissolution in sodium hydroxide without affecting the minor metal. Nobel metals like silver or copper forms monocrystalline nanoparticles and their size is dependent on temperature (increasing with increasing temperature). Nickel forms polycrystalline sub-micrometer particles, that grain size is dependent on temperature. As prepared nanoparticles exhibit massive agglomeration. It is not limitation of the process, because the application of nanoparticles is as a precursor for bottom-up processing of bulk nanocrystalline materials (metals, alloys and metal matrix composites). Compaction of nanoparticles prepared by selective leaching is possible by several methods. The most suitable seems to be spark plasma sintering which enables to obtain extremely high heating rates and the thermal exposure of material is as short as necessary. This prevents the unwanted grain coarsening of compacted material and helps to keep superior properties of bulk nanocrystalline metals.%22 (en)
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| Title
| - Selective leaching as a method of metallic nanoparticles preparation
- Selective leaching as a method of metallic nanoparticles preparation (en)
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| skos:prefLabel
| - Selective leaching as a method of metallic nanoparticles preparation
- Selective leaching as a method of metallic nanoparticles preparation (en)
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| skos:notation
| - RIV/60461373:22310/14:43897658!RIV15-GA0-22310___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/60461373:22310/14:43897658
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - powder metallurgy; intermetallics; SPS (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
| - 2nd International Conference on Chemical Technology
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Marek, Ivo
- Novák, Pavel
- Vojtěch, Dalibor
- Michalcová, Alena
- Svobodová, Petra
- Kubatík, Tomáš František
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| http://linked.open...vavai/riv/typAkce
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| http://linked.open.../riv/zahajeniAkce
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| number of pages
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| http://purl.org/ne...btex#hasPublisher
| - Česká společnost průmyslové chemie
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| https://schema.org/isbn
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| http://localhost/t...ganizacniJednotka
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