Learn how the warpage test is done for ceramic body and slip. Understand the test method and why low warpage is important for fired ceramic products.
Warpage tests can be conducted for clays as well as slips. This test helps to determine the extent of deformation occurring in the material during firing. Low warpage is crucial for producing thinner products and heavier items like one-piece toilets.
Various test methods are used to measure the degree of deformation in the clay body. One common method involves casting a 5 mm bar, drying it, and then placing it in a firing kiln with two-point support, as shown in the picture.
The supports are made of refractory material. After firing, the deviation at the center point of the bar is measured to determine the degree of warpage.
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