IXL 45D

Description: Tan to brown burning smooth, plastic low temperature stoneware

Oxide	Analysis	Formula
CaO	0.37%	0.04
K2O	3.60%	0.23
MgO	0.83%	0.12
Na2O	0.70%	0.07
TiO2	0.66%	0.05
Al2O3	17.10%	1.00
P2O5	0.15%	0.01
SiO2	66.10%	6.56
Fe2O3	2.19%	0.08
MnO	0.01%	-
LOI	6.70%	n/a
Oxide Weight		547.04
Formula Weight		586.32

Notes

A smooth light tan burning terra cotta. It progresses to brown as it matures above cone 1 (due to a significant percentage of feldspar naturally present in the material). Although mainly used in brick and pipe production, Luke Lindoe discovered that this material, all by itself, produced a wonderful pottery clay, suitable to make stoneware at very low temperatures. It was also useful in stoneware bodies to introduce feldspar. 45D was often coupled with 45R, a red burning clay, also smooth and plaster. A sand, like 45F, was added when the 45F/45R combination did not have sufficient drying performance.

Related Information

IXL 45D clay

This was used to make vitrified pipe. These SHAB test-fired bars show it from cone 6 (top) down to cone 1. At cone 1 it has 3% porosity but above that it fires to almost porcelain density. This level of fired maturity in a clay that does not fire red is unusual. Alberta Clay products had sealed their sewer pipe using salt glaze for decades because their clays, obtained near Medicine Hat, were refractory and porous, even when fired at high temperatures. IXL discovered this low temperature light burning and plastic terra cotta near Elkwater, Alberta. It fired so vitreous that no glaze was needed!

Links

Typecodes	Clay Other Clays that are not kaolins, ball clays or bentonites. For example, stoneware clays are mixtures of all of the above plus quartz, feldspar, mica and other minerals. There are also many clays that have high plasticity like bentonite but are much different mineralogically.
Materials	IXL 45R
Materials	98 Mix
Materials	IXL 45F

By Tony Hansen
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