Premium
Chemical Stabilization of β‐Cristobalite
Author(s) -
Perrotta Anthony J.,
Grubbs Donald K.,
Martin Edward S.,
Dando Neal R.,
McKinstry Herbert A.,
Huarg ChiYuen
Publication year - 1989
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.1151-2916.1989.tb06150.x
Subject(s) - cristobalite , differential scanning calorimetry , magic angle spinning , thermal stability , materials science , crystallography , differential thermal analysis , magic angle , scanning electron microscope , phase transition , chemical stability , spinning , tridymite , thermal analysis , mineralogy , diffraction , chemistry , thermal , nuclear magnetic resonance spectroscopy , solid state , thermodynamics , organic chemistry , polymer chemistry , quartz , composite material , physics , optics
Chemically stabilized β‐cristobalite has been synthesized in the Na 2 O‐Al 2 O 3 ‐SiO 2 and CaO‐Al 2 O 3 ‐SiO 2 systems. Highly reactive chemical precursors in the gel and zeolitic state are thermally transformed to stabilized β‐cristobalite crystalline solutions in each system. High‐temperature X‐ray diffraction, phase data, differential scanning calorimetry, thermochemical analysis, electron microscopy, and magic‐angle spinning NMR give information on the limits of stability of β‐cristobalite, the α—β phase transition, thermal expansion behavior, and the structural state of the crystalline solutions.