The oxide of yttrium-barium-copper
The oxide of yttrium-barium-copper.
The oxide of yttrium-barium-copper, also known as YBCO (spoken: and-be-Ko) is a commonly used high temperature superconductor of the second kind, a well-known fact that he is first received a superconductor with a critical temperature of more than 77 K (the boiling point of nitrogen).
Chemical formula is YBa2Cu3O7−x.
Molar mass 666,19 g/mol, density 6.3 g/cm3, melting point > 1000 °C.
Critical temperature (the temperature at which there is the effect of superconductivity) – 93 K.
Critical induction (field that destroys the superconducting state) was 5.7 TL.
Critical current density (the current that destroys the superconducting state) – 7⋅106 A/cm2.
The first sample of yttrium oxide-barium-copper were obtained at a temperature of 1000-1300 To the following chemical reaction:
4BaCO3 + Y2(CO3)3 + 6CuCO3 + (1/2 – x)O2 → YBa2Cu3O7−x + 13CO2.
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