Knowledge of dimensional changes with respect to time and temperature is vitally important in many engineering problems. Examples range from quality control of sintering processes to materials selection and design, failure analysis and composites research. The dilatometer is the standard tool used to directly investigate dilation and contraction upon heating and/or cooling.
During firing, a glaze applied on a ceramic body undergoes several transformations, including water loss from the clay components, glass transition and softening. During the softening phase, the glaze starts to melt, giving rise to a continuous liquid layer.
Happy Valentine's Day! In the best romantic relationships, two often dissimilar partners join together to create a new, singular unit. Likewise, a finished ceramic tile generally incorporates a fired ceramic body and a glaze to create a product of beauty and utility. Unfortunately, not all relationships are a match made in heaven.
Measuring the elastic properties of a green ceramic as it is being fired can be difficult and often requires sophisticated non-destructive testing (NDT) techniques. One effective method is called the the impulse excitation technique (IET).