Superconductivity: new record
We know that superconductivities have been reached at cold temperatures. However, if you want to market products for their characteristics, the operating temperature cannot be far from the ambient temperature.
Therefore, the researchers began in the so-called "rise". Now, researchers Peter Edwards, Ry-Shi-Lin and Jeffrey Tallon have set the new record to -145°C.
These have achieved this record by experimenting with a ceramic material of thallium, barium, calcium, copper and oxygen. However, converting ceramic material into superconductive requires shock treatment. This treatment is as follows: 5 tons of pressure compression per square meter; then it is maintained at 910°C in three hours and then at 750°C in 10 days; finally, the material is annealed in the atmosphere of oxygen and nitrogen.
In this process the ceramic material loses 5% of its weight. Researchers claim that weight loss is due to the loss of thallium ions by forming cation holes that control the superconductivity of the material.
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