Ceramics As A Super Conductor

Texturing is essential to achieve high current densities in polycrystalline wires or the thick films of ceramic superconductors.

Ceramics as a super conductor.

The best ceramic conductors are the so called high tc superconductors materials that lose their resistance at much higher critical temperatures than their metal alloy counterparts. However discoveries in the late 20th century have also shown some ceramics to be the most electrically conducting. This superconductor has a critical transition temperature around 90k well above liquid nitrogen s 77k temperature. The first high temperature superconductor was discovered in 1986 by ibm researchers bednorz and müller 3 6 who were awarded the nobel prize in physics in 1987 for their important break through in the discovery of superconductivity in ceramic materials.

The high t c field is continually expanding. Conductive ceramics advanced industrial materials that owing to modifications in their structure serve as electrical conductors. Chemical formula is yba2cu3o7. The ceramic materials used to make superconductors are a class of materials called perovskites.

Ceramics are amongst the most electrically insulating materials known. Most high tc ceramics are layered structures with two dimensional copper oxygen sheets along which superconduction takes place. The most significant new materials are bismuth based and thallium based. Many ceramic superconductors physically behave as superconductors of the second type.

In addition to the well known physical properties of ceramic materials hardness compressive strength brittleness there is the property of electric resistivity.