Ageing of fired-clay ceramics: Comparative study of rehydroxylation processes in a kaolinitic raw material and moon-shaped ceramic idol from the Bronze Age

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22810%2F16%3A43901870" target="_blank" >RIV/60461373:22810/16:43901870 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/16:43901870

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.clay.2015.11.002" target="_blank" >http://dx.doi.org/10.1016/j.clay.2015.11.002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.clay.2015.11.002" target="_blank" >10.1016/j.clay.2015.11.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ageing of fired-clay ceramics: Comparative study of rehydroxylation processes in a kaolinitic raw material and moon-shaped ceramic idol from the Bronze Age

Popis výsledku v původním jazyce

Sources of raw materials and identification of the provenance of ancient ceramics as well as the estimation of the firing temperatures of ceramic findings are two principal problems archaeologists solve with material scientists. These two problems are closely interconnected. This paper is focused on the identification of clay mineral kaolinite in a ceramic body of archaeological ceramic idol in comparison with a reference kaolinitic raw material. Kaolinite identified in studied ceramic samples can be from a primary source or a product of rehydroxylation of metakaolinite of the ceramics. The rehydroxylation process is simulated here in laboratory conditions in an autoclave by modifications of standardized test methods. The rehydroxylation processwas studied on a kaolinitic raw material and the acquired results were then applied to evaluate samples of a unique archaeological object from the Late Bronze Age - a moon-shaped ceramic idol, which was found at an archaeological site near Prague in the Czech Republic. XRF, XRD, TG-DTA, TG-DSC and IR analyses were used to study this process. XRD and TA proved the presence of the clay mineral kaolinite in its end parts. A small amount of kaolinite was also detected in the central part, but only by TA. It was proved that kaolinite in the end parts originated from raw material and that its presence in the central part was caused by the rehydroxylation of the metakaolinite. It was probably due to the use of the moon-shaped ceramic idol as an andiron in an open fireplace.

Název v anglickém jazyce

Ageing of fired-clay ceramics: Comparative study of rehydroxylation processes in a kaolinitic raw material and moon-shaped ceramic idol from the Bronze Age

Popis výsledku anglicky

Sources of raw materials and identification of the provenance of ancient ceramics as well as the estimation of the firing temperatures of ceramic findings are two principal problems archaeologists solve with material scientists. These two problems are closely interconnected. This paper is focused on the identification of clay mineral kaolinite in a ceramic body of archaeological ceramic idol in comparison with a reference kaolinitic raw material. Kaolinite identified in studied ceramic samples can be from a primary source or a product of rehydroxylation of metakaolinite of the ceramics. The rehydroxylation process is simulated here in laboratory conditions in an autoclave by modifications of standardized test methods. The rehydroxylation processwas studied on a kaolinitic raw material and the acquired results were then applied to evaluate samples of a unique archaeological object from the Late Bronze Age - a moon-shaped ceramic idol, which was found at an archaeological site near Prague in the Czech Republic. XRF, XRD, TG-DTA, TG-DSC and IR analyses were used to study this process. XRD and TA proved the presence of the clay mineral kaolinite in its end parts. A small amount of kaolinite was also detected in the central part, but only by TA. It was proved that kaolinite in the end parts originated from raw material and that its presence in the central part was caused by the rehydroxylation of the metakaolinite. It was probably due to the use of the moon-shaped ceramic idol as an andiron in an open fireplace.

Druh

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

CEP obor

AC - Archeologie, antropologie, etnologie

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Applied Clay Science

ISSN

0169-1317

e-ISSN

—

Svazek periodika

119

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

358-364

Kód UT WoS článku

000366539000021

EID výsledku v databázi Scopus

2-s2.0-84949463501