Premium
Thermodynamics of Nitrogen in B 2 O 3 , B 2 O 3 ─SiO 2 , and B 2 O 3 ─CaO Systems
Author(s) -
Wakasugi Takashi,
Tsukihashi Fumitaka,
Sano Nobuo
Publication year - 1991
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.1151-2916.1991.tb07154.x
Subject(s) - nitrogen , dissolution , solubility , crucible (geodemography) , chemistry , inorganic chemistry , silicate , oxygen , nitride , partial pressure , graphite , organic chemistry , layer (electronics) , computational chemistry
The BN solubilities for B 2 O 3 , B 2 O 3 ─SiO 2 , and B 2 O 3 ─CaO systems have been measured mainly at 1823 K using a graphite crucible. The capability of the systems for nitrogen dissolution is compared with that of silicate systems in terms of nitride capacity. The dependence of nitrogen solubility in molten CaO containing 15 mol% of B 2 O 3 on oxygen and nitrogen partial pressures is also investigated. It has been found that there are two mechanisms for nitrogen dissolution, namely as chemically bonded nitrogen and as physically dissolved nitrogen gas.