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Mass Spectrometric Identification of Si–O–H( g ) Species from the Reaction of Silica with Water Vapor at Atmospheric Pressure
Author(s) -
Opila Elizabeth J.,
Fox Dennis S.,
Jacobson Nathan S.
Publication year - 1997
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.1151-2916.1997.tb02935.x
Subject(s) - chemistry , water vapor , analytical chemistry (journal) , mass spectrometry , halide , bar (unit) , partial pressure , ion , vapor pressure , mass spectrum , vapour pressure of water , silicon , oxygen , atmospheric pressure , inorganic chemistry , chromatography , organic chemistry , meteorology , oceanography , geology , physics
A high‐pressure sampling mass spectrometer was used to detect the volatile species formed from SiO 2 at temperatures between 1200° and 1400°C in a flowing water vapor/oxygen gas mixture at 1 bar total pressure. The primary vapor species identified was Si(OH) 4 . The fragment ion Si(OH) 3 + was observed in quantities 3 to 5 times larger than the parent ion Si(OH) 4 + . The Si(OH) 3 + intensity was found to have a small temperature dependence and to increase with the water vapor partial pressure as expected. In addition, SiO(OH) + , believed to be a fragment of SiO(OH) 2 , was observed. These mass spectral results were compared to the behavior of silicon halides.