Abstract
The main phase transformations during synthesis of β‐sialon from kaolin of the Prosyanovskii deposit (Ukraine) under test-industrial production conditions have been studied. Sialon was prepared by carbothermal reduction in graphite-tube furnaces in nitrogen. It is shown that the process is characterized by the simultaneous occurrence of several chemical reactions with formation of intermediate phases (Si2ON2, X1‐phase), silicon carbide, and (apart from β‐sialon) sialons based on AlN polytypes. The phase composition of the final product is determined not only by the charge composition but also by the set of production parameters. Results of the work may provide a basis for commercial preparation of sialon powder.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
J. G. Lee, R. Casarini, and R. B. Cutler, “Sialon derived from clay provide an economical refractory material, ” Industrial Heating, 43, No. 4, 50–53 (1976).
I. L. Boyarina, A. B. Puchkov, A. M. Gavrish, and Z. D. Zhukova, “Sialons, a new refractory material, ” Ogneupory, No. 12, 24–28 (1989).
A. M. Gavrish, I. L. Boyarina, É. I. Degtyareva, et al., “Study of the structure of sialon prepared by nitriding kaolin, ” Neorgan. Materialy, 18, No. 1, 57–61 (1982).
I. L. Boyarina, A. B. Puchkov, A. M. Gavrish, et al., “Sialon on the basis of natural clay raw material, ” Ogneupory, No. 4, 44–48 (1982).
P. P. Pikuza. I. E. Kir'yanova, E. S. Lugovskaya, and D. V. Shchur, “High-temperature reaction of kaolin with carbon in a nitrogen atmosphere, ” Khim. Tekhnol., No. 1, 50–52 (1989).
M. Pazel and P. Prasonna, “Formation of silicon from kaolinite clay, ” Interceram., 4, No. 8, 593–595 (1991).
T. C. Ekstrom, K. J. D. MacKenzie, G. V. White, et al., “Volatile products formed by carbon-reduction in nitrogen of clay mixtures with silica and elemental silicon, ” J. Mater. Chem., 6, 1225–1230 (1996).
V. D. Ovcharenko (ed.), Ukraine Kaolins: Handbook [in Russian], Nauk. Dumka, Kiev (1982).
W. M. Carty and U. Senepati, “Porcelain, raw materials, processing, phase evolution and mechanical behavior, ” J. Amer. Ceram. Soc., 81, No. 1, 3–20 (1988).
K. J. D. MacKenzie, R. H. Meinhold, G. V. White, et al., “Carbothermal formation of β-sialon from kaolinite and halloysite, ” J. Mater. Sci., No. 29, 2611–2619 (1994).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Grigor'ev, O.N., Panasyuk, A.D. Synthesis of Sialon from Kaolin and Its Phase Formation. Powder Metallurgy and Metal Ceramics 42, 383–387 (2003). https://doi.org/10.1023/B:PMMC.0000004158.19602.aa
Issue Date:
DOI: https://doi.org/10.1023/B:PMMC.0000004158.19602.aa