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Coalification – properties and classification of coal
Sýkorová, Ivana
2011 - Czech
The rank, properties and composition of peat and coal are discussed in relation to classification and utilization of coals. Prouhelnění, vlastnosti a složení rašeliny a uhlí byly diskutované v souvislosti s klasifikací a využitím uhlí.
Keywords:
coalification; reflectance; maceral composition
Available at various institutes of the ASCR
Coalification – properties and classification of coal
The rank, properties and composition of peat and coal are discussed in relation to classification and utilization of coals.
Microporous inorganic polymers based on metakaolinite and their open porosity structure of a size of 10-20 nm in diameter
Steinerová, Michaela
2011 - English
Geopolymer monomodal pore size distribution of 15 nm in diameter can change within 10-120 nm according to Si/Al ratio and water content in the space between clusters of condensed precursor nanoparticles. Results provided by mercury porosimetry, SEM and AFM.
Keywords:
inorganic polymer matrix; Si/Al ratio systems; condensation-reactions
Available at various institutes of the ASCR
Microporous inorganic polymers based on metakaolinite and their open porosity structure of a size of 10-20 nm in diameter
Geopolymer monomodal pore size distribution of 15 nm in diameter can change within 10-120 nm according to Si/Al ratio and water content in the space between clusters of condensed precursor ...
Strength, elasticity, and fracture of composites with pyrolysed matrices based on methylsiloxane resins with optimized ratio of “T” and “D” components
Černý, Martin; Žaloudková, Margit; Glogar, Petr; Sucharda, Zbyněk; Strachota, Adam; Chlup, Zdeněk
2010 - Czech
The investigated composites reinforced with Nextel720 fibers reveal acceptable mechanical properties for applications exposed to temperature up to 1300 °C. Mechanical properties were studied after three-hour exposition at 1300, 1400 and 1500 °C without a protective atmosphere. This temperature treatment increases the mechanical strength up to 15 %. Studované kompozity vyztužené vlákny Nextel720 mají mechanické vlastnosti přijatelné pro aplikace vystavené teplotám do 1300 °C. Byly studovány mechanické vlastnosti po tříhodinové expozici při 1300, 1400 a 1500 °C bez ochranné atmosféry. Po tomto tepelném zpracování dochází ke zvýšení mechanické pevnosti až o 15 %.
Keywords:
mechanical properties; composites, pyrolysis; methylsiloxane resin
Available at various institutes of the ASCR
Strength, elasticity, and fracture of composites with pyrolysed matrices based on methylsiloxane resins with optimized ratio of “T” and “D” components
The investigated composites reinforced with Nextel720 fibers reveal acceptable mechanical properties for applications exposed to temperature up to 1300 °C. Mechanical properties were studied after ...
Inorganic wastes like raw material for geopolymer binders
Hanzlíček, Tomáš; Perná, Ivana
2010 - Czech
Great amount of industry wastes lead to the technology which are able to use waste materials as additives to different types of matter or convert industry waste materials to the new basic material. Velké množství průmyslových odpadů vede k rozvoji technologií, které jsou schopné buď odpady využít jako plniva do jiných hmot, nebo mohou průmyslové odpady přímo konvertovat na nový základní materiál.
Keywords:
waste materials; raw materials; geopolymer
Available at various institutes of the ASCR
Inorganic wastes like raw material for geopolymer binders
Great amount of industry wastes lead to the technology which are able to use waste materials as additives to different types of matter or convert industry waste materials to the new basic material.
Optimizing and Evaluating the Biocompatibility of Fiber Composites with CaP Additives
Suchý, Tomáš; Sucharda, Zbyněk; Balík, Karel; Sochor, M.; Bačáková, Lucie
2010 - English
Composite materials based on a polyamide fabric (aramid) and a polydymethyl-siloxane (PDMS) matrix were designed for application in bone surgery. In order to increase the bioactivity, 2, 5, 10, 15, 20 and 25 vol. % of nano/micro hydroxyapatite (HA) and tricalcium phosphate (TCP) were added. The effect of the additives on the biocompatibility was studied. It appears that nano additives have a more favorable effect than micro particles on mechanical properties. For final application of the composites as substitutes for bone tissues, 15 vol. % of nano hydroxyapatite additives is an optimum amount: in this case both the mechanical properties and the biological properties are optimized without distinct changes in the inner structure of the composite.
Keywords:
biocomposites; calcium phosphate; polyamide fibers; polydimethylsiloxane
Available at various institutes of the ASCR
Optimizing and Evaluating the Biocompatibility of Fiber Composites with CaP Additives
Composite materials based on a polyamide fabric (aramid) and a polydymethyl-siloxane (PDMS) matrix were designed for application in bone surgery. In order to increase the bioactivity, 2, 5, 10, 15, 20 ...
The use of mixed waste polymers in thermal treatment with brown coal
Kříž, Vlastimil; Bičáková, Olga; Machač, P.
2010 - English
Samples of brown coal from Jiří Mine alone and its mixtures with waste plastics were gasified on a laboratory scale. Using a thermal-degratation module, inserted in the stream of volatile products of pyrolysis and gasification, energetic gas with with higher hydrogen content was obtained.
Keywords:
brown coal; waste polymers; gasification
Available at various institutes of the ASCR
The use of mixed waste polymers in thermal treatment with brown coal
Samples of brown coal from Jiří Mine alone and its mixtures with waste plastics were gasified on a laboratory scale. Using a thermal-degratation module, inserted in the stream of volatile products of ...
The comparison of the corrosion layers character of 3 samples of Zr1Nb alloys by means of water vapor sorption
Weishauptová, Zuzana
2010 - Czech
The performed study is aimed on the comparison of ZrO2 corrosion layers by means of the analysis of water vapour sorption isotherms together with microhardness determination. Provedená studie je zaměřena na porovnání charakteru korozních vrstev ZrO2 s pomocí analýzy sorpčních izoterem vodní páry spolu se stanovením mikrotvrdostí.
Keywords:
zirconium alloys; corrosion layer; hydrated ZrO2
Available at various institutes of the ASCR
The comparison of the corrosion layers character of 3 samples of Zr1Nb alloys by means of water vapor sorption
The performed study is aimed on the comparison of ZrO2 corrosion layers by means of the analysis of water vapour sorption isotherms together with microhardness determination.
Examples of influence of structural conditions on landslide development in Beskydy and Vsetínské vrchy Mountains
Rybář, Jan; Klimeš, Jan
2009 - Czech
The influence of structural conditions on slope stability in the Western Carpathians flysh region was described and assessed using results of systematic engineering-geological mapping. S využitím výsledků systematického inženýrskogeologického mapování svahových deformací v měřítku 1 : 10 000 je na vybraných příkladech analyzován vliv strukturně geologických poměrů na stabilitu svahů v regiónu flyše Západních Karpat.
Keywords:
structurally controlled slope movements; flysh; West Carpathians
Available at various institutes of the ASCR
Examples of influence of structural conditions on landslide development in Beskydy and Vsetínské vrchy Mountains
The influence of structural conditions on slope stability in the Western Carpathians flysh region was described and assessed using results of systematic engineering-geological mapping.
Indirect stress measurement by static vertical pendulum
Kalenda, Pavel; Neumann, L.; Wandrol, I.
2009 - English
Static pendulums were used for indirect stress measurement in Bohemian Massif. The anomalous tilt and/or noise were recognised before the biggest earthquakes on the Euroasian lithospheric plate. The Kurile EQ (24.11.2008) was predicted a day advance.
Keywords:
stress; earthquake; pendulum
Available at various institutes of the ASCR
Indirect stress measurement by static vertical pendulum
Static pendulums were used for indirect stress measurement in Bohemian Massif. The anomalous tilt and/or noise were recognised before the biggest earthquakes on the Euroasian lithospheric plate. The ...
The use and disposal of the cinders from wooden masses and bio-wastes combustion
Hanzlíček, Tomáš; Perná, Ivana
2009 - Czech
The results of the 2009 year were focused on knowledge showing and proving that the bio-cinders do not contain the toxic or dangerous elements. Their composition of calcium and potassium salts predestinates the ashes as fertilizers. The composition of offered fertilizer was protected by patent proposal. Výstupem práce v roce 2009 je návrh na využití v rámci poznání, že popely neobsahují žádné toxické látky a naopak jejich obsah vápníku a draslíku je předurčuje k výrobě organicko-minerálního hnojiva. Jeho kompozice a způsob výroby je chráněn podaným průmyslovým vzorem a návrhem na udělení patentu.
Keywords:
bio-cinders; composition; combustion
Available at various institutes of the ASCR
The use and disposal of the cinders from wooden masses and bio-wastes combustion
The results of the 2009 year were focused on knowledge showing and proving that the bio-cinders do not contain the toxic or dangerous elements. Their composition of calcium and potassium salts ...
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