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Scanning electron microscopic studies of pore formation in mica schist insulating brick
Author(s) -
Patel M.
Publication year - 1989
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300180105
Subject(s) - mica , materials science , composite material , scanning electron microscope , sodium silicate , porosity , brick , silicate , schist , morphology (biology) , chemical engineering , geology , metamorphic rock , geochemistry , engineering , paleontology
SEM micrographs showing porous structures and bonding of pores through broken mica flakes are presented. Pores of varying dimensions (10–400 μm) are formed. Interlayer spaces in mica are shown to be the preferential direction for heat and subsequently crack propagation during heat treatment for producing cellular insulating bricks at 900°C. The cracks end up with the formation of large pores in the presence of foaming agent and sodium silicate.