Ceradel Frit C 1250

Alternate Names: C1250 Fritte, C 1250 Fritte, Ceradel Frit 1250

Description: Lead bisilicate frit, Bisilicate de plomb

Oxide	Analysis	Formula
SiO2	35.00%	2.00
PbO	65.00%	1.00
Oxide Weight		343.38
Formula Weight		343.38

Notes

The manufacturer calls this a lead bisilicate but only gives a range of values for the analysis (SiO₂ - 15-40%, PbO 40-70%). Since the standard lead bisilicate is 65:35, that is what we have assigned here. We have another source that confirms that.

Related Information

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Materials	Frit 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.
Materials	Lead Bisilicate Frit A standard frit of 1 molar part of PbO and 2 of SiO2. It is considered stable and non-leachable.
Materials	Ceradel Frit C 1249
Typecodes	Leaded Frit Frits can contain 1% or 80% PbO so this category can be misleading, check the chemistry to find out.

Data

Co-efficient of Linear Expansion	67 (10-7/C 20/300C)
Frit Softening Point	900-1100C

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