Seriphyl

Oxide	Analysis	Formula
K2O	4.00%	0.27
Na2O	0.40%	0.04
TiO2	0.40%	0.03
Al2O3	16.00%	1.00
SiO2	72.50%	7.69
Fe2O3	4.00%	0.16
LOI	2.80%	n/a
Oxide Weight		620.29
Formula Weight		638.16

Notes

A low cost ceramic sericite material useful to reduce firing temperature (it has good bonding properties because of its low PCE), control shrinkage, reduce absorption. Fires to a pink color. The material is prepared by mining and crushing.

Different grades vary primarily by iron content (and fire more pink and then more orange as it increases up to 6%), the analysis shown here is representative.

Related Information

Links

Materials	Pyrotrol
Materials	Pyrofrac
Materials	Andafrac
Materials	Pyrophyl
Materials	Pyrofrac 4205
Materials	Pyrofrac 2034
Materials	Pyrofrac 4203
Materials	Pyrofrac 2024
Materials	Pyrofrac 2023
Materials	Pyrofrac 0204
Materials	Pyrofrac 0304
Materials	Pyrofrac 1004
Materials	Pyrofrac 1655
Materials	Pyrofrac 1855
Materials	Andalusite
Materials	Pyrophyllite
Materials	Alkatrol
Minerals	Sericite A talc-like mineral (Na2O-K2O).3Al2O3.6SiO2.2H2O. It has a relatively flat, platey grain structure.
Typecodes	Flux Source Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies.

Data

Pyrometric Cone Equivalent	14
Density (Specific Gravity)	2.6

By Tony Hansen
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