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Application of mica based pigments
Štengl, Václav; Kalendová, A.; Trojan, M.
2001 - Czech
Properties of sandwich pigments based on mica coated with metal oxide layers are described. Various mica types were characterized and used for pilot plant scale synthesis of pigments. Paints containing this kind of pigments were formulated and tested anticorrosive coatings. Synthesis and characterization of some thermally stable pigments based on mixed metal oxides is also described. Popsána syntéza bariérových pigmentů na bázi slídy, pokryté oxidy kovů. Charakterizovány různé typy slídových nosičů a syntetizovány vzorky pigmentů i v poloprovozním měřítku. Byly formulovány nátěrové hmoty s využitím těchto pigmentů a charakterizová fyzikální i ochranné vlastnosti nátěrových hmot. Dále byly syntetizovány některé směsné oxidy s cílem jejich aplikace jako termostabilní pigmenty.
Keywords:
pigments; mica
Available at various institutes of the ASCR
Application of mica based pigments
Properties of sandwich pigments based on mica coated with metal oxide layers are described. Various mica types were characterized and used for pilot plant scale synthesis of pigments. Paints ...
Nanosized particles of oxides and oxide-hydroxides of Mg, Al, Ti
Šubrt, Jan; Štengl, Václav; Svobodová, Monika; Bezdička, Petr; Kváča, Zdeněk; Večerníková, Eva; Bakardjieva, Snejana
2001 - Czech
Nanosized particles of oxides and oxide-hydroxides of Mg, Al, Ti and Fe were prepared from organic precursors and by homogeneous precipitation of aqueous solutions. The oxide-hydroxides were dried using the 'Critical point drying' method and were characterized by SEM, TEM, electron diffraction, XRD and also by methods of thermal analysis. Z organických prekursorů a cestou homogenního srážení byly připraveny nanočásticové oxidy a hydroxidy Mg, Al, Ti a Fe. Hydroxidy byly zpracovány metodou sušení nad kritickou teplotou a charakterizovány pomocí elektronové mikroskopie a difrakce, změření specifického povrchu, práškovou rentgenovou difraktometrií a termickou analýzou.
Keywords:
electron diffraction; oxide-hydroxides; thermal analysis
Available at various institutes of the ASCR
Nanosized particles of oxides and oxide-hydroxides of Mg, Al, Ti
Nanosized particles of oxides and oxide-hydroxides of Mg, Al, Ti and Fe were prepared from organic precursors and by homogeneous precipitation of aqueous solutions. The oxide-hydroxides were dried ...
Crystallization of ammonium aluminium alum
Hostomský, Jiří; Hostomská, Věra
2001 - Czech
The report deals with the research and development of the process for production of extra pure ammonium aluminium sulphate by crystallization from solution. The distribution of contaminants (Na, K, Fe, Si, Ca, Cr, Mg, Ti, Ga, Mn, Zn, Co, Pb a Cu) between the crystalline phase and solution was determined for two initial concentrations of ammonium aluminium sulphate and for two final crystallization temperatures. The effect of recrystallization of ammonium aluminium sulphate and the effect of the excess of ammonium ions upon the product purity was investigated. V rámci výzkumu a vývoje technologie výroby vysoce čistého krystalického síranu amonno-hlinitého krystalizací z roztoku byla stanovena distribuce kontaminantů (Na, K, Fe, Si, Ca, Cr, Mg, Ti, Ga, Mn, Zn, Co, Pb a Cu) mezi krystalickou fází a roztokem - pro dvě výchozí koncentrace roztoku síranu hlinitoamonného a pro dvě konečné teploty krystalizace. Dále byl stanoven vliv rekrystalizace síranu hlinitoamonného a vliv přebytku amonných iontů na obsah kontaminantů.
Keywords:
ammonium aluminium sulphate; purification; crystallization
Available at various institutes of the ASCR
Crystallization of ammonium aluminium alum
The report deals with the research and development of the process for production of extra pure ammonium aluminium sulphate by crystallization from solution. The distribution of contaminants (Na, K, ...
Laboratory research report. Black Mother of God. Gallery of the City of Prague
Hradilová, J.; Hradil, David; Hradecká, P.
2001 - Czech
Pre-restoration materials research of the painting is based on microscopic (both optical and electron) analyses of grounds and painting layers in the cross sections of fragments with the aim to identify pigments and to describe the stratigraphy of re-nts involving to choose the suitable restoration procedure. Other methods (e.g. microchemical and histochemical tests) are used for identification of binding media. Materiálový průzkum malby v rámci restaurátorského zásahu využívá zejména metod optické a elektronové mikroskopie a mikroanalýzy fragmentárních příčných řezů barevných vrstev k identifikaci pigmentů a popisu stratigrafie přemaleb, což přispívá ke správné volbě restaurátorského postupu. Další, zejména mikrochemické a histochemické, metody jsou použity k identifikaci pojiv.
Keywords:
materials research; restoration; painting layers stratigraphy
Available at various institutes of the ASCR
Laboratory research report. Black Mother of God. Gallery of the City of Prague
Pre-restoration materials research of the painting is based on microscopic (both optical and electron) analyses of grounds and painting layers in the cross sections of fragments with the aim to ...
Research and development of the process for production of extra pure ammonium aluminium sulphate II
Rodová, A.; Hora, L.; Bezucha, P.; Synek, V.; Kokšal, J.; Hodslavská, J.; Hostomský, Jiří; Hostomská, Věra
2001 - Czech
295 Research and development of the process for production of extra pure ammonium aluminium sulphate, where the concentration of contaminants does not exceed 0.3 ppm for Ca, Co, Cr, Fe, Mg, Mn, Pb, Si, Ti, Zn, 2.0 ppm for Ga and Na and 3.0 ppm for K. Preparation of ammonium aluminium sulphate (alum) solution by dissolution of aluminium hydroxide in sulphuric acid solution and by addition of ammonia. Purification of alum by crystallization and recrystallization. Výzkum a vývoj technologie výroby vysoce čistého krystalického síranu amonno-hlinitého, kde koncentrace kontaminantů Ca, Co, Cr, Fe, Mg, Mn, Pb, Si, Ti, Zn nepřevýší 0,3 ppm, Ga a Na 2,0 ppm a K 3,0 ppm. Příprava roztoku síranu hlinitoamonného (kamence) rozpouštěním hydroxidu hlinitého v kyselině sírové a následnou amoniakalizací. Čistění kamence krystalizací a rekrystalizací.
Keywords:
ammonium aluminium sulphate; purification; crystallization
Available at various institutes of the ASCR
Research and development of the process for production of extra pure ammonium aluminium sulphate II
295 Research and development of the process for production of extra pure ammonium aluminium sulphate, where the concentration of contaminants does not exceed 0.3 ppm for Ca, Co, Cr, Fe, Mg, Mn, Pb, ...
Laboratory research report. The frescoes (secco)in the Minoric house in Český Krumlov
Hradilová, J.; Hradil, David
2001 - Czech
Pre-restoration materials research of the painting is based on microscopic (both optical and electron) analyses of grounds and painting layers in the cross-sections of fragments with the aim to identify pigments and to describe the stratigraphy of re-nts involving to choose the suitable restoration procedure. Other methods (e.g. microchemical and histochemical tests) are used for identification of binding media. Materiálový průzkum malby v rámci restaurátorského zásahu využívá zejména metod optické a elektronové mikroskopie a mikroanalýzy fragmentárních příčných řezů barevných vrstev k identifikaci pigmentů a popisu stratigrafie předmaleb, což přispívá ke sprvné volbě restaurátorského postupu. Další, zejména mikrochemické a histochemické metody jsou použity k identifikaci pojiv.
Keywords:
paintings; restoration
Available at various institutes of the ASCR
Laboratory research report. The frescoes (secco)in the Minoric house in Český Krumlov
Pre-restoration materials research of the painting is based on microscopic (both optical and electron) analyses of grounds and painting layers in the cross-sections of fragments with the aim to ...
Relations between structure, morphology a mechanical properties of cerianite based polishing powders
Bezdička, Petr; Grygar, Tomáš; Bakardjieva, Snejana; Petřina, Antonín; Augustová, Ivana
2001 - Czech
We studied relationships between structure, morphology a mechanical properties of cerianite based polishing powders. Byly studovány vztahy mezi strukturou, morfologií a mechanickými vlastnostmi lešticích prášků na bázi CeO2.
Keywords:
structure; morphology; cerianite
Available at various institutes of the ASCR
Relations between structure, morphology a mechanical properties of cerianite based polishing powders
We studied relationships between structure, morphology a mechanical properties of cerianite based polishing powders.
EPR study of beer samples and brewing materials
Stopka, Pavel
2000 - Czech
Hydroxyl (OH.), nitroxide (NO.)and stable organic free radicals were identified and determined in samples of beer. The maximum of their concentration is 5-10 min. after the opening of bottle. The influence of UV irradiation and hydrogen peroxide is de Ve vzorcích byly identifikovány a stanoveny hydroxylové (OH.), nitroxidové (NO.) a stabilní organické radikály. Koncentrace těchto radikálů vykazuje maximum po 5-10 min. od otevření láhve. Je popsán vliv UV ozařování a vliv peroxidu vodíku.
Keywords:
Free Radicals; Yeast; Beer
Available at various institutes of the ASCR
EPR study of beer samples and brewing materials
Hydroxyl (OH.), nitroxide (NO.)and stable organic free radicals were identified and determined in samples of beer. The maximum of their concentration is 5-10 min. after the opening of bottle. The ...
Material research of the sculptural group of St. Vincent from Ferrera and St. Prokop, Charles Bridge, Prague
Svobodová, J.; Hradil, David; Přikryl, R.
2000 - Czech
Determined mineralogical and chemical composition of the surface layers of sandstone sculptures was interpreted as the result of the weathering processes in the past. The influence of atmospherical pollution and previous restoration and conservation of the stone was discussed. Mineralogicko-chemický průzkum povrchových vrstev pískovcové sochy byl zaměřen na projevy zvětrávání v prostředí městské atmosféry a vedl k diskusi o možných procesech v minulosti i vlivem dřívějších restaurátorských zásahů.
Available at various institutes of the ASCR
Material research of the sculptural group of St. Vincent from Ferrera and St. Prokop, Charles Bridge, Prague
Determined mineralogical and chemical composition of the surface layers of sandstone sculptures was interpreted as the result of the weathering processes in the past. The influence of atmospherical ...
Laboratory research report. St. Roch (polychromed wooden sculpture) in the church of St. Nicolas in Bílovec
Hradilová, J.; Hradil, David
2000 - Czech
Pre-restoration materials research of the painting is based on microscopic (both optical and electron) analyses of grounds and painting layers in the cross-sections of fragments with the aim to identify pigments and to describe the stratigraphy of re-ts involving to choose the suitable restoration procedure. Other methods (e.g. microchemical and histochemical tests) are used for identification of binding media. Materiálový průzkum malby v rámci restaurátorského zásahu využívá zejména metod optické a elektronové mikroskopie a mikroanalýzy fragmentárních příčných řezů barevných vrstev k identifikaci pigmentů a popisu stratigrafie přemaleb, což přispívá ke správné volbě restaurátorského postupu. Další, zejména mikrochemické a histochemické metody jsou použity k identifikaci pojiv.
Keywords:
materials research; restoration; painting layers stratigraphy
Available at various institutes of the ASCR
Laboratory research report. St. Roch (polychromed wooden sculpture) in the church of St. Nicolas in Bílovec
Pre-restoration materials research of the painting is based on microscopic (both optical and electron) analyses of grounds and painting layers in the cross-sections of fragments with the aim to ...
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