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## measuring fluxing power

### Lawrence Ewing on sun 11 mar 01

Hi everyone,

After reading John, Paul and Hank's comments on measuring fluxing power I
was reminded of a suggestion made to me by Nath Viswanath in 1999. He
wanted to know if I could get Matrix to use a system devised by Dr. Martin
Lengersdorff which uses factors & a formula for determining the fluxing
power of a glaze at various temperatures. Nath provided a chart from
Lengersdorff's book ("Praktische Berechnungen von
Massen und Glasuren") which categorizes glazes depending on the calculated
factor and the firing temperature.

Following the interest in fluxing power expressed in recent postings I
decided to place this feature in the beta version of Matrix (V4.0) which I
am currently developing so that those using Matrix could have a play around
with it and see whether there is any validity in the system.

I have also placed the 'Ionic Potential' calculation system (that Hank
posted) into Matrix for the same reason.

Those of you who have Matrix V3.02 or later and would like to play around
with the flux factor facilities in Matrix V4.0 beta, you can download the
beta software from the Matrix web site.

I must emphasize that I do not stand by the validity of these flux power
calculations. They are provided for experimentation only and will only stay
in the software if they are shown through testing to have some value.

To access the Flux Factor Calculation in Matrix enter or load a glaze into
the Recipe to Formula environment and then select the 'Calcuate Flux Factor'
item in the Recipe to Formula menu.

Regards,

Lawrence Ewing

Here is the data supplied to me by Nath which I have used in Matrix.

Calculation of FLUXFACTORS which determines the flow properties of a glaze.

ZrO2 0.32
Al2O3 0.32
SiO2 0.38 = X
TiO2 0.38

MgO 0.54
CaO 0.58
BaO 0.60
ZnO 0.60
CuO 0.60
MnO 0.60
CoO 0.60
NiO 0.60 = Y
Fe2O3 0.60
FeO 0.60
K2O 0.88
Na2O 0.88
Sb2O3 1.00
B2O3 1.00
PbO 2.00

Formula:
F = 100 mutiplied by Y and divided by (X + Y)

F = 100* Y/(X+Y)

Chart for the evaluation when F in the above formula has the following
values and looking at the temperature and the corresponding F values the
glaze type can be determined.

Deg C Walltile Sanitary Porcelain Matt Crystal
glaze glaze glaze glaze glaze
1000 57 70 82
1020 68 80
1040 55 66 77
1060 64 75
1080 50 62 72
1100 49.2 60 70
1120 47.8 58 67
1140 56 65
1160 46.1 54 62
1180 52 60
12009 45.7 46.7 48.7 50 57
1230 43 48 54
1250 38.9 39.2 41 46 52
1280 35.4 37 44 49
1300 33.8 35.5 42 47
1320 31
1350 28.8 33.8
1380 31
1410 29.2
1435 26.6
1460 24

Calculate the Factor "F" based on the above formula and compare for the
temperature required the glaze type- matt, glossy etc.

### Ian Macmillan on sun 11 mar 01

Lawrence,

Can you give me a little more detail on the use of these factors? Do
I multiply the factor given by the molar concentration for each
constituent?

thanks

Ian

>
>
>Calculation of FLUXFACTORS which determines the flow properties of a glaze.
>
>
>ZrO2 0.32
>Al2O3 0.32
>SiO2 0.38 = X
>TiO2 0.38
>
>MgO 0.54
>CaO 0.58
>BaO 0.60
>ZnO 0.60
>CuO 0.60
>MnO 0.60
>CoO 0.60
>NiO 0.60 = Y
>Fe2O3 0.60
>FeO 0.60
>K2O 0.88
>Na2O 0.88
>Sb2O3 1.00
>B2O3 1.00
>PbO 2.00
>
> Formula:
> F = 100 mutiplied by Y and divided by (X + Y)
>
> F = 100* Y/(X+Y)
>

### John Hesselberth on sun 11 mar 01

Lawrence Ewing wrote:

>I
>decided to place this feature in the beta version of Matrix (V4.0) which I
>am currently developing so that those using Matrix could have a play around
>with it and see whether there is any validity in the system.

Great Lawrence! Now if you'll only get version 4 running on a
Mac........ And no, I will not turn my Mac into a PC just to be able to
run Matrix.

Regards, John

"The life so short, the craft so long to learn." Chaucer's translation of
Hippocrates, 5th cent. B.C.

### Lawrence Ewing on tue 13 mar 01

Hi Ian,

The data I received did not detail how I should use the factors so I tried
the calculation using mols, mol% and wgt% and it did not seem to make much
difference to the result so I multiply by mols in the Matrix test
procedures.

Cheers,

Lawrence

-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
Behalf Of Ian Macmillan
Sent: Monday, March 12, 2001 4:37 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Measuring fluxing power

Lawrence,

Can you give me a little more detail on the use of these factors? Do
I multiply the factor given by the molar concentration for each
constituent?

thanks

Ian

>
>
>Calculation of FLUXFACTORS which determines the flow properties of a
glaze.
>
>
>ZrO2 0.32
>Al2O3 0.32
>SiO2 0.38 = X
>TiO2 0.38
>
>MgO 0.54
>CaO 0.58
>BaO 0.60
>ZnO 0.60
>CuO 0.60
>MnO 0.60
>CoO 0.60
>NiO 0.60 = Y
>Fe2O3 0.60
>FeO 0.60
>K2O 0.88
>Na2O 0.88
>Sb2O3 1.00
>B2O3 1.00
>PbO 2.00
>
> Formula:
> F = 100 mutiplied by Y and divided by (X +
Y)
>
> F = 100* Y/(X+Y)
>

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