A method of making a glass composition consisting essentially by mol percent
of
about 55SiO275; 5BaO30; and 2MgO22
for use as a matrix of composite materials. A method of making a glass matrix-ceramic
particulate composition useful for sealing electrochemical structures, such as
solid oxide fuel cells is also disclosed. Method steps include the admixture of
finely divided Mg2SiO4 particulates with the matrix glass,
to reach an overall composition by mol percent of about 55SiO265;
5BaO15; and 25MgO35.