Study of phase equilibria in system BaO–B2O3 from 32 to 67mol% B2O3

Sintering behavior and dielectric properties of SrB2Si2O8 ceramics

“…2 The DTA-TG curves of the slurries for the specimen SB and SB-3 On the other hand, the sintering behavior of the SrO-B 2 O 3 -SiO 2 ceramics can be also influenced by the introduction of BaO to the SrO-B 2 O 3 -SiO 2 composition. As known from the phase diagram of the binary system BaO-B 2 O 3 [14], the onset of a liquid phase in the binary system BaO-B 2 O 3 can be observed at least 869°C, it means that the eutectic temperature of the binary system BaO-B 2 O 3 is lower than that of the binary system SrO-B 2 O 3 . So the introduction of BaO to the SrO-B 2 O 3 -SiO 2 ceramics is expected to improve the sintering behavior so as to cause a good densification sintering for the SrB 2 Si 2 O 8 ceramics.…”

Preparation and properties of the barium borate glassy matrix composite materials containing fused silica and monoclinic zirconia

“…According to the phase diagram of the binary system BaO-B 2 O 3 [8,9], the onset of a liquid phase in the binary system BaO-B 2 O 3 can be observed at least 869 • C. Specially, in the phase diagram of the binary system BaO-B 2 O 3 , a low temperature liquid-phase zone is located at a composition range of about 50-70 mol.% B 2 O 3 content, which consequently supplies a reference for the design of the barium borate glassy matrix with low melting characteristics. Furthermore, considering the volatility of B 2 O 3 , the B 2 O 3 content of the BaO-B 2 O 3 composition designed in the work is inclined to a high level in the low temperature liquid-phase zone.…”

“…4,931,133). Accordingly, barium borate can also be used to fabricate LTCC composite ceramics as a LTCC matrix [6,7], since the appropriate BaO-B 2 O 3 compositions have the potential to transform into a glassy form at a relative low sintering temperature (800-900 • C) [8,9]. Especially in order to achieve a densification sintering, the introduction of the ␣-alumina ceramic particles to the barium borate glassy matrix can offer more possibilities to set a proper sintering behavior and maximize mechanical strength [10][11][12][13][14].…”

Low-temperature densification sintering and properties of CaAl2Si2O8 ceramics with MeO·2B2O3 (Me = Ca, Sr, Ba)

“…In particular, among the peaks in the three XRD patterns, the quartz peaks in the patterns of specimens with BaO·2B 2 O 3 flux agents exhibited the greatest intensity. As evident in the phase diagrams of the binary system BaO-B 2 O 3 , the BaO·2B 2 O 3 composition has wide liquid-phase areas corresponding to a temperature of approximately 900°C, which is lower than the liquid-phase temperatures of the CaO·2B 2 O 3 and SrO·2B 2 O 3 compositions [2,21]. This lower liquid-phase temperature of BaO·2B 2 O 3 suggests that the existence of BaO·2B 2 O 3 as a liquid-phase medium can not only supply a sufficient volume of liquid phase for the low-temperature densification, but also facilitate the crystallization of amorphous SiO 2 molecules to form thermodynamically stable crystal phases.…”