Carbonitriding reactions of diatomaceous earth: phase evolution and reaction mechanisms

Journal of the Serbian Chemical Society

卷:71

Matović Branko¹  Šaponjić Aleksandra¹  Bošković Snežana¹ 

[1] INN Vinča, Laboratorija za materijale, Beograd;

关键词: carbothermal reactions;    precursors;    diatomaceous earth;    si3n4;    sialon;   

DOI  :  10.2298/JSC0606677M

来源: DOAJ

【 摘 要 】

The possibility of using diatomaceous earth as Si precursor for low temperature 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 °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 intermediate 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.

【 授权许可】

Unknown