Variable thermal expansion of glass-ceramics containing Ba_1-xSr_xZn₂Si₂O₇.

ABSTRACT: Up to now, the thermal expansion behavior of multiphase glass-ceramics cannot be predicted reliably because of the nescience about the formation of the type and concentration of crystalline phases. In the system BaO-SrO-ZnO-SiO₂, recently a new phase based on Ba_1-xSr_xZn₂Si₂O₇ solid solutions was found, which exhibits unexpected low and highly anisotropic thermal expansion, which can be used for an adjustment of the thermal expansion properties. In the case of sealing materials for high-temperature reactors, the formation of this phase should be avoided. Hence, in this manuscript the concentration thresholds in which these solid solutions precipitate from glasses were determined. The phase analysis was correlated with the the

SUBMITTER: Thieme C 

PROVIDER: S-EPMC5469781 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature