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Nacre biocrystal thermal behavior

Abstract : The thermal behaviour of Pinctada margaritifera nacre was studied at different temperatures by means of thermal gravimetric, thermo-mechanical and Rock-Eval analyses. From the mechanical point of view nacre exhibited a complete reversible behaviour up to 230 °C. The bio-aragonite allotrope was seen to be as stable as the abiotic aragonite up to 470–500 °C. It was also evidenced that the organic phase was keeping cracking oxygen functions at temperatures as high as 650 °C. Nacre thermal behaviour could be described following four distinctive stages and discussed in comparison with previous data obtained in oxidative conditions.
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Submitted on : Tuesday, November 6, 2007 - 1:37:46 PM
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Xavier Bourrat, Loic Francke, Evelyne Lopez, Marthe Rousseau, Philippe Stempflé, et al.. Nacre biocrystal thermal behavior. CrystEngComm, Royal Society of Chemistry, 2007, 9, pp.1205-1208. ⟨10.1039/b709388h⟩. ⟨insu-00185543⟩

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