Ceramic wire mesh

Wire mesh with ceramic coating

Heating liquids in the laboratory

Ceramic wire nets are an aid in the laboratory when heating medium-sized amounts of liquid in flat-bottomed glass vessels over a flame. The ceramic wire mesh consists of a metallic wire mesh , which is provided with a thin coating of refractory ceramic fibers in the middle on both sides .

A small amount of powder poured directly onto the ceramic stain can be ignited from below for a clearly visible burn.

use

The wire mesh is centered on a tripod or tripod ring. The laboratory equipment to be heated , usually Erlenmeyer flasks or beakers , is placed in the middle of the coating. The burner, usually a Bunsen or Teclub burner , is located centrally under the ceramic wire mesh.

Thanks to the circular ceramic coating, the generated heat is evenly distributed over the vessel . Further, it prevents a luminous burner flame , the glass vessel fouled . The use of a tripod and wire mesh also enables the burner to be quickly removed from under the glass vessel, thus stopping the supply of heat immediately.

The coating used to contain harmful asbestos fibers .

Executions

Ceramic wire nets are square, have a folded edge, where they can be gripped safely with crucible tongs close to the flame and which prevents fraying. The nets are made of sufficiently strong black or aluminized iron wire or stainless steel, each woven in linen.

Typical sizes range from 10 to 20 cm side length of the square.

Individual evidence

1. ^ Walter Wittenberger: Chemische Laboratoriumstechnik , Springer-Verlag, Vienna, New York, 7th edition, 1973, pp. 16-17, ISBN 3-211-81116-8 .