Carbonitriding reactions of diatomaceous earth: phase evolution and reaction mechanisms | Zendy

Branko Matović | Zendy; Aleksandra Šaponjić | Zendy; Snezana Bošković | Zendy

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Carbonitriding reactions of diatomaceous earth: phase evolution and reaction mechanisms

Author(s) -

Branko Matović,

Aleksandra Šaponjić,

Snezana Bošković

Publication year - 2006

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0606677m

Subject(s) - carbonitriding , earth (classical element) , carbothermic reaction , oxide , materials science , raw material , phase (matter) , chemical engineering , porosity , metallurgy , mineralogy , chemistry , composite material , organic chemistry , carbide , physics , engineering , mathematical physics

The possibility of using diatomaceous earth as Si precursor for low tem- perature synthesis of non-oxide powders by carbothermal reduction-nitridation was studied. It was found that carbonitriding reactions produce phases of the Si-Al-O-N system. Already at 1300 o C, nanosized, non-oxide powders were obtained. The comparatively low reaction temperatures is attributred to the nano-porous nature of the raw material. The evolution of crystalline phases proceeded via many intermedi- ate stages. The powders were characterized by X-ray and SEM investigations. The results showed that diatomaceous earth can be a very effective source for obtaining non-oxide powders.

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