Conclusions
An analysis was carried out of the method of preparing the SnO2 as a factor in the degree of sintering of the cassiterite refractory.
Grinding fired and unfired SnO2 in a vibro-mill increases the degree of dispersion of the material; an increase in the proportion of grains finer than 10μ results in an increase in the density of the green product. The proportion of iron grinidings is significantly smaller with unfired than with fired SnO2.
The porosity and density of the sintered specimens depends on the fineness of the ground SnO2.
Specimens molded from pure tin oxide whether or not fired and ground undergo only marginal compaction when heated to 1600°C, i.e., the porosity of the specimens depends solely on the porosity of the green product. However, the strength of the specimens which to a certain extent depends on the porosity, increases in this case. Starting at 1600°C the growth of the SnO2 crystals caused the strength of some of the specimens to decrease.
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Translated from Ogneupory, No. 5, pp. 37–42, May, 1977.
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Degtyareva, É.V., Kabakova, I.I. & Drozd, V.I. The method of preparing the tin dioxide as a factor in the sintering of the cassiterite refractory. Refractories 18, 289–293 (1977). https://doi.org/10.1007/BF01294080
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DOI: https://doi.org/10.1007/BF01294080