|Monthly Tech-Tip |
Alternate Names: C1251 Fritte, C 1251 Fritte, Ceradel Frit 1251
Description: Lead monosilicate frit, Monosilicate de plomb
This analysis is guessed, the manufacturer calls it a lead monosilicate and provides the approximate chemistry of (SiO2 - 15-40%, PbO 60-100%). However, since the lead monosilicate analysis is theoretically 1:1 lead:silica that is what we have assigned here.
Frits are made by melting mixes of raw materials, quenching the melt in water, grinding the pebbles into a powder. Frits have chemistries raw materials cannot.
Ceradel Frit C 1249
Lead Bisilicate Frit
A standard frit of 1 molar part of PbO and 2 of SiO2. It is considered stable and non-leachable.
Lead Monosilicate Frit
A standard frit of 1 molar part of PbO and 1 of SiO2. It melts lower than a lead bisilicate.
Frits can contain 1% or 80% PbO so this category can be misleading, check the chemistry to find out.
|Co-efficient of Linear Expansion||83x10-7 (20-300C)|
|Frit Softening Point||900-1100C|
|By Tony Hansen|
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