mailtoandrew@FSMAIL.NET on mon 20 sep 04
Hello Roy,
I did a bit of work a little time back with a high fired porcelain of high
strength that vitrified around 1400oC. It may be useful as a starting
point for you.
As the actual raw materials I used may not be available near you Ive noted
the alkali contents of each component:
25% of a kaolin with K2O at 1.6%
18% of a ball clay with K2O at 1.8%
15% of a feldspar with K2O at 4.1% and Na2O at 4.8%
27% quartz with K2O at 0.01%
15% alumina with Na2O at 0.40%
The chemical analysis of the body was:
SiO2 59.1
Al2O3 32.1
Fe2O3 0.39
TiO2 0.18
CaO 0.09
MgO 0.15
K2O 1.38
Na2O 0.82
LOI 5.80
If youre interested I can email you a firing curve.
Regards,
Andrew
Ron Roy on wed 22 sep 04
Thanks Andrew,
I'll let you know if I need more but this is excellent!
RR
>I did a bit of work a little time back with a high fired porcelain of high
>strength that vitrified around 1400oC. It may be useful as a starting
>point for you.
>
>As the actual raw materials I used may not be available near you Ive noted
>the alkali contents of each component:
>25% of a kaolin with K2O at 1.6%
>18% of a ball clay with K2O at 1.8%
>15% of a feldspar with K2O at 4.1% and Na2O at 4.8%
>27% quartz with K2O at 0.01%
>15% alumina with Na2O at 0.40%
>
>The chemical analysis of the body was:
>SiO2 59.1
>Al2O3 32.1
>Fe2O3 0.39
>TiO2 0.18
>CaO 0.09
>MgO 0.15
>K2O 1.38
>Na2O 0.82
>LOI 5.80
>
>If youre interested I can email you a firing curve.
>
>Regards,
>
>
>Andrew
>
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Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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