| The effects of differf!nt fluxing ingredients on melting characteristics, thermal
expansion, DC resistiuit:y and dielectric properties of the glass compositions, MgO
10, GaO 10, Al,Oa 19, SiO, 61% and MgO 18, Al,03 19, SiO, 63%
were studied. Li,O is the strongest fluxing ing11edient but it increased expansivity
and dielectric loss. Addition of fluorine up to 3% and MnO up to 6% improved
meltability without appreciably affecting thermal and electrical properties. B,03,
ZnO, BaO and TiO, do not have such beneficia~ effects. Presence of even small
amounts of alkalies (less than I%) appreciably increased dielectric loss at h'igh
temperatures. Properlies of these glasses compare well with those of some of the
common insulating materials. |
