|Monthly Tech-Tip |
Left to right (all fired at cone 10): Pure 200 mesh kaolin vitrified at cone 10 cracked in two seconds. Next is a 42 mesh more refractory ball clay, it failed in four seconds. A refractory halloysite/kaolin material failed in eight seconds. A white glazed stoneware failed in 14 seconds.
When sudden changes in temperature cause dimensional changes ceramics often fail because of their brittle nature. Yet some ceramics are highly resistant.