kiln-fired clay works of sculpture or pottery are called

In some cases, depending on the firing temperature and intended use, more specific terms might be used like:

Bisque: Clay that has been fired once at a lower temperature, making it hard but still somewhat porous. This is often used as an intermediate stage before applying glaze.

Earthenware: Pottery fired at a lower temperature, resulting in a porous material suitable for some functional uses but not fully watertight.

Stoneware: Pottery fired at a higher temperature, making it denser, stronger, and non-porous.