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PHYSICAL CHEMISTRY OF FIRING STEATITE CERAMICS*

1943; Wiley; Volume: 26; Issue: 10 Linguagem: Inglês

10.1111/j.1151-2916.1943.tb14453.x

1551-2916

R. Stone,

Recycling and utilization of industrial and municipal waste in materials production

A bstract The composition of normal as well as low‐loss steatite bodies is shown on the MgO‐Al 2 O 3 ‐SiO 2 phase diagram. Clay‐talc bodies containing 10% or less of clay have the longest firing range. Bodies near the forsterite corner of the clinoenstatite‐forsterite‐cordierite triangle have a firing range of about 100 °C. but they are too refractory. Auxiliary fluxes, such as CaO and BaO, shorten the firing range appreciably. The alkalis lengthen it but are electrically detrimental. The RO 2 elements, such as SiO 2 and ZrO 2 , when added in appreciable quantities, give good firing range but an excessive increase in the refractoriness of the body.