An earthenware compartment or oven, often shaped like a half cylinder, used in furnaces to protect objects heated from the direct action of the fire, as in scorification of ores, cupellation of ore buttons, etc.
A small oven for baking and fixing the colors of painted or printed pottery, without exposing the pottery to the flames of the furnace or kiln.
Large refractory pot set inside the firing chamber forming an inner chamber to contain the pipes firing free from direct contact with the flame.
a kiln with an inner chamber for firing things at a low temperature
an arched fire-brick furnace used in assaying operations
fire-clay box in which glass (or porcelain) objects are enclosed, when placed in the muffle kiln, to protect them from the flames and smoke while being subjected to low-temperature firing, especially in the process of firing enamels and gilding at temperatures of about 950-1320°F (500-700°C).
a kiln or a compartment in a kiln in which pottery can be fired without exposure to direct flame.
A vaulted or arched, flat-bottomed earthenware vessel, open at one end and closed at the other, placed in a furnace* to afford a space shielded from actual contact with the fuel; sometimes with openings at the side; often placed over a cupel*.
A muffle furnace is a (usually) front-loading box-type oven or kiln for high-temperature applications such as fusing glass, creating enamel coatings and ceramics. They are also used in many research facilities, for example by chemists in order to bake the moisture out of a sample to ensure it is completely dry.