Manganese cordierite glass-ceramics

摘要

Glass-ceramic products having a manganese-containing cordierite crystal structure and being impervious void free bodies exhibiting low coefficients of thermal expansions of DIFFERENCE 15x10-7/ DEG C. (25 DEG -1000 DEG C.) and high electrical resistivity are obtained by the sintering of glass or glass-ceramic powders having the molar composition of about 2RO.2Al2O3.5SiO2, wherein RO is a combination of MgO and MnO.