ISSN:
1573-9139
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions An investigation was carried out of the effect of various surfactants added during the wet vibrogrinding of zircon on the degree of dispersion of the powder and on the sintering of specimens molded from the powders. When added in proportions up to 0.2% all surfactants tested (naphthenate soap, Asidol, titanium soap, GKZh-94, GKZh-10, triethanolamine, and sugar) helped to reduce the time required to grind the zircon to a given fineness from 15–20 to 4 h, i.e., by a factor of about 2.5–4. It was found that the proportion of fine fractions and the specific surface of the powder influence the open porosity and apparent density of the fired specimens. It was confirmed that sintering to an open porosity below 1% can be achieved with powders containing at least 80% grains finer than 5μ including at least 60% grains finer than 2μ which corresponds to a powder with a specific surface of at least 12 m2/g. It was established that in wet vibro-grinding a relation exists between the amount of accumulated iron grindings, on the one hand, and the degree of dispersion of the ground material and the apparent density of the fired specimens, on the other. The amount of iron grindings can serve as an indirect indicator of the suitability of the ground zircon for the production of superhigh density refractories. When wet vibrogrinding zircon it is recommended that an additive be used in the form of 0.05–0.1% triethanolamine.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01294098
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