Stuck Defect in Ceramics Manufacturing: Causes & Analysis

Stuck Defect in Ceramics Manufacturing: Causes & Analysis

Overview

The stuck defect in ceramics refers to instances where two or more wares become attached and fused together during the firing process. It can also occur when the bottom glaze of a ware fuses to the kiln car batt.

Common Causes

• Accidental contact between wares: Improper bottom leveling, inadequate support, or the breaking of risers or supports can cause wares to come into contact. When one piece falls onto another during firing, the high temperatures cause the glaze to melt and fuse the pieces together.

• Excessive glaze application: Over-application of glaze on the bottom of wares causes the excess to melt during firing and fuse the ware to the kiln car batt, making it difficult to remove without damaging the product.

• Over-firing: Excessive firing temperatures can cause the glaze to melt more than intended, increasing the risk of fusion.

Prevention Measures

To reduce the occurrence of stuck defects, follow these practices:

• Ensure that all pieces are stable and securely supported before firing

• Control the amount of glaze applied to the bottom of the wares

• Strictly monitor firing temperatures and schedules to prevent over-firing

• Ensure proper alignment and use durable supports to prevent accidental contact