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SOME FIRING AND FIRED PROPERTIES OF NEW YORK STATE DIOPSIDE, WOLLASTONITE, AND A TREMOLITIC MATERIAL *
Author(s) -
Amberg C. R.
Publication year - 1945
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1945.tb14526.x
Subject(s) - diopside , wollastonite , talc , enstatite , tremolite , mineralogy , materials science , quartz , tourmaline , analytical chemistry (journal) , composite material , metallurgy , chemistry , raw material , chromatography , physics , meteorite , organic chemistry , astronomy , asbestos , chondrite
A bstract New York State diopside and wollastonite as well as a high tremolite material obtained as a by‐product of the electrostatic separation of talc were fired at a series of temperatures. Petrographic examination of the fired materials, absorptions, shrinkages, and P.C.E. values are reported, and observations on color and hardness are also given. Summary Diopside and wollastonite resemble talc in having short firing ranges, but they develop a dark color at higher temperatures due to a brown, glassy phase that separates from solid solution at temperatures of 1200°C. and higher. The tremolite‐talc‐quartz mixture is highly refractory; its color at 1435°C. is still white and complete reaction of the constituents has taken place to produce cristobalite and a solid solution of diopside in enstatite. Low absorption was not obtained even with the complete reaction and no glassy phase was evident.