Volunteer

A versatile clay selection for casting, pressing, or plastic forming process methods. It is similar to M-23 in mineralogy with slightly more organic content. Volunteer has very good plasticity and is an excellent selection in ceramic formulas requiring a fine particle size distribution ball clay.

Typical Data Sheet Shipping Point: Gleason, Tennessee

RAW PROPERTIES
Crude Color Light Grey 
Dry Modulus of Rupture (psi)* 565 
Wet Sieve Residue, +200 mesh (%) 0.75 
Water of Plasticity (%) 38.3 
Linear Drying Shrinkage (%) 7.85 
Soluble Sulfates (ppm) 200 
Filtration (ml) 24 
Specific Surface Area (m2/g) 20.8
CEC/MBI (meq/100 ml) 11.0
pH 5.4 
Particle Size (% less than) 5 Micron 1 Micron .5 Micron 86 68 58
Median Particle Diameter (Micron) 0.38 

*50% clay/50% flint, cast bars
 

CHEMICAL ANALYSIS
Silicon Dioxide (SiO2) 55.55 
Aluminum Oxide (Al2O3) 28.75
Iron (Ferric) Oxide (Fe2O3) 1.02
Titanium Dioxide (TiO2) 1.84
Calcium Oxide (CaO) 0.19 
Magnesium Oxide (MgO) 0.56 
Sodium Oxide (Na2O) 0.08 
Potassium Oxide (K2O) 0.43 
Loss on Ignition 11.38

 

FIRED PROPERTIES Cone 04 Cone 3 Cone 11
Linear Fired Shrinkage (%) 6.2 7.0 8.7
Absorption (%) 17.2 11.2 3.6
PCE……………………………31-32