Kiln Shelves / Batts / Tiles

Batts are used as the basic kiln shelf support element in most kiln and furnace structures, forming a flat, rigid surface which carries the ware during firing, sintering or heat treatment. They are typically made using large, high capacity hydraulic presses with hardened steel moulds to give a product that is flat and uniform to tight tolerances. They are also known as “refractory tiles”, “plates” or “kiln shelves” depending on the industry.

Kiln shelves have many variations in either size, shape, material or all these combining factors. They can be made from cordierite, high alumina, silicon carbide, or nitride bonded silicon carbide.

Types of Kiln Shelves and Batts from IPS Ceramics

Selecting the right type of batts and kiln shelves will depend upon factors surrounding your production processes. These include the type of kiln, the temperature rating during firing, the size of your kiln shelves, whether your kiln atmosphere involves oxidation or reduction, the ware weight they must support, and the frequency of firing.

Plain Batts

Plain Batts

Batts are often coated with a wash or engobe to prevent product from sticking to the batt.

Perforated Batts

Perforated Batts

Perforated batts are often used to reduce weight or improve heat transfer during firing.

A cast version offers a smooth, sealed surface that helps to minimise kiln dirt.

Extruded Batts

Extruded Batts

These are thicker, stonger batts that have channels running through the centre to reduce weight.

The batts are ground on all surfaces to give precise control over sizes and improved flatness.

Often used for heavier loads (such as sanitaryware).

Cover Batts

Cover Batts

Cover batts are thin batts that are used to retain ceramic fibre used in kiln car bases or kiln walls. The batts provide a rigid surface protecting the soft fibre and reducing kiln dirt.

Feature Batts

Feature Batts

Recesses can locate product on the batt, standardising product placement and preventing movement.

Saw-tooth and flat-top grooves can stop circular products from rolling and help maintain straightness. Grooves also minimise contact between product and support, reducing contamination or sticking.

Cast Batts

Cast Batts

Often used in roller kilns as the surface of a cast batt is smoother and harder than the pressed version, resulting in less kiln dirt being created to abrasion from the rollers.

Discs

Discs

Used to support large circular product such as grinding wheels or electrical insulators.