Premium
Pressureless Sintering of Apatite/Wollastonite–Phlogopite Glass–Ceramics
Author(s) -
FaeghiNia Aida,
Marghussian Vahak K.,
TaheriNassaj Ehsan,
Pascual Maria J.,
Durán Alicia
Publication year - 2009
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.1551-2916.2009.03018.x
Subject(s) - frit , wollastonite , phlogopite , materials science , sintering , apatite , diopside , crystallization , ceramic , differential thermal analysis , mineralogy , composite material , chemical engineering , chemistry , geology , diffraction , geochemistry , raw material , physics , organic chemistry , optics , mantle (geology) , engineering
Apatite/wollastonite (A/W)—phlogopite (Ph) glass‐ceramics of various compositions were prepared by means of pressureless sintering of two frit mixtures. Sintering conditions were studied by differential thermal analysis (DTA) and hot‐stage microscopy. The sintered samples were characterized by X‐ray diffraction. The results showed that by addition of a frit of phlogopite composition to a frit of A/W composition, the crystallization temperature decreases which results in suppressing the sintering process. The 50–50 frits mixture could be sintered to 0.90 relative density after 1 h heating at 1100°C. The type and sequence of formation of crystalline phases were also modified. Whereas the A/W glass–ceramic crystallized to apatite and wollastonite, the crystallization products of 50–50 frits mixture were fluoro‐apatite, wollastonite, diopside, and mellilite.