•The secret to cool bodies and glazes is a lot of testing.
•The secret to know what to test is material and chemistry knowledge.
•The secret to learning from testing is documentation.
•The place to test, do the chemistry and document is an account at https://insight-live.com
•The place to get the knowledge is https://digitalfire.com

Sign-up at https://insight-live.com today.

Christy Red Plastic Fireclay

OxideAnalysisFormula
CaO0.50%0.033
MgO1.00%0.093
K2O2.90%0.115
Na2O0.10%0.006
P2O50.30%0.008
TiO21.30%0.061
Al2O327.20%1.000
SiO250.20%3.132
Fe2O35.10%0.120
LOI11.00
Oxide Weight332.25
Formula Weight373.31
If this formula is not unified correctly please contact us.

According to the data sheet it fires red progressing to brown by 2200F and purple/brown by 2400F.
The data sheet from Christy Minerals is unclear since it lists separate drying shrinkages for each of four temperatures (1800, 2000, 2200, 2400F) and they vary from 4.5 to 8.5% (this is not firing related, only one number should be stated).

Also, the LOI shown on the chart averages about 7% but in the analysis is 11%.
This material has an uncharacteristic fired shrinkage reduction with increasing temperature (12% at cone 08 going down to 3% by cone 9). This is happening because the material is beginning to expand already by 1900F and starting to bloat by 2200F.

Particle size (this is a 35 mesh material)
Retained: US 40: 22%
Retained: US 70 26.7%
Retained: US 200 28.5%


Out Bound Links


By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Christy Red Plastic Fireclay" descrip="" searchkey="" loi="0.00" casnumber=""> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.500" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="1.000" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="2.900" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.100" tolerance=""/> <oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="0.300" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="1.300" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="27.200" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="50.200" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="5.100" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="11.000" tolerance="1"/> </volatiles> </material>


Feedback, Suggestions

Your email address

Subject

Your Name

Message


Copyright 2003, 2008, 2015 https://digitalfire.com, All Rights Reserved