The role of intermediates in the process of red ferric pigment manufacture from FeSO4 center dot 7H(2)O

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F02%3A00001692" target="_blank" >RIV/61989592:15310/02:00001692 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15310/02:00007752

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The role of intermediates in the process of red ferric pigment manufacture from FeSO4 center dot 7H(2)O

Popis výsledku v původním jazyce

One method of industrial manufacture of red ferric pigments is based on the thermal decomposition of FeSO4.7H(2)O into alpha Fe2O3(copperas red). The difficult reproducibility of the color quality of the final pigment is the main problem of this process.One of the factors that can influence the pigment color is contamination by some of the intermediates formed during the transformation process. The identification of two groups of intermediates is the basic result of an extensive laboratory investigation carried out using Fe-57 Mossbauer spectroscopy and X-ray powder diffraction (XRD). The first group of intermediates includes sulfato-phases as FeSO4.H2O, FeSO4, Fe(OH) SO4, Fe2O(SO4)(2), Fe2O(SO4)(2).xH(2)O xis an element of(0, 1), and Fe-2(SO4)(3). Thermally metastable polymorphs of iron(III) oxide, beta-Fe2O3, gamma-Fe2O3 and epsilon-Fe2O3, represent the other group. Mossbauer characterization of all intermediate products is given. A significant influence of beta-Fe2O3 on the pigment

Název v anglickém jazyce

The role of intermediates in the process of red ferric pigment manufacture from FeSO4 center dot 7H(2)O

Popis výsledku anglicky

One method of industrial manufacture of red ferric pigments is based on the thermal decomposition of FeSO4.7H(2)O into alpha Fe2O3(copperas red). The difficult reproducibility of the color quality of the final pigment is the main problem of this process.One of the factors that can influence the pigment color is contamination by some of the intermediates formed during the transformation process. The identification of two groups of intermediates is the basic result of an extensive laboratory investigation carried out using Fe-57 Mossbauer spectroscopy and X-ray powder diffraction (XRD). The first group of intermediates includes sulfato-phases as FeSO4.H2O, FeSO4, Fe(OH) SO4, Fe2O(SO4)(2), Fe2O(SO4)(2).xH(2)O xis an element of(0, 1), and Fe-2(SO4)(3). Thermally metastable polymorphs of iron(III) oxide, beta-Fe2O3, gamma-Fe2O3 and epsilon-Fe2O3, represent the other group. Mossbauer characterization of all intermediate products is given. A significant influence of beta-Fe2O3 on the pigment

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/ME%20351" target="_blank" >ME 351: Mössbauerovské studium nanostrukturovaných Fe-O částic</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Hyperfine Interactions

ISSN

0304-3843

e-ISSN

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Svazek periodika

139/140

Číslo periodika v rámci svazku

N

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

437-445

Kód UT WoS článku

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EID výsledku v databázi Scopus

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