Monthly Tech-Tip from Tony Hansen SignUp

No tracking! No ads!

1-9 | A | B | C | D | E | F | Frits | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z


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


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


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.


Pyrometric Cone Equivalent 14
Density (Specific Gravity) 2.6
By Tony Hansen
Follow me on

Got a Question?

Buy me a coffee and we can talk, All Rights Reserved
Privacy Policy