Methods of stabilizing the content of iron oxides in a glass composition

Stabilizing the spectral properties and technologies of glass

“…The effect of a decrease of the overall iron balance in the glass positive -the light transmission of the glass increases, but at the same time the glassmaking process becomes more complicated and the homogeneity of the molten glass is degraded because the diathermancy of the glass increases and the bottom reducing layers, to which the access of oxygen is limited, are heated. In practice there are positive results when in such cases an iron-containing component (crocus) is added to the mix to stabilize the iron content in the molten glass [13,14]. But this must not be done sharply but follow the tendency for the iron balance in the raw material and glass to decrease or increase.…”

Color stabilization in bulk-tinted glass

“…Therefore, fluctuations of iron content in glass are regarded as one of the possible reasons for an unstable quality of the finished product caused by changing heat transfer in the glass melt. A method is known for correcting the batch composition by introducing iron oxide compounds to stabilize the content of iron oxide in glass [1].The instruction for the calculation of the amount of ironbearing batch additives is based on determining their maximum content for stabilizing the preset content of Fe 2 O 3 . This instruction uses data on analysis of materials and glass for 1 -2 years.…”

“…Therefore, fluctuations of iron content in glass are regarded as one of the possible reasons for an unstable quality of the finished product caused by changing heat transfer in the glass melt. A method is known for correcting the batch composition by introducing iron oxide compounds to stabilize the content of iron oxide in glass [1].…”