Manganese Diboride MnB2

product information:
Name: Manganese Diboride
Purity: ≥99.5 single phase
Particle size: D50: 5~10 microns
Properties: dark gray powder
Molecular formula: MnB
Molecular weight: 65.75
Uses: It can be used as a boron-containing additive for anti-oxidation, anti-erosion and thermal strength improvement, and used as new materials such as nuclear industry, military industry, and superconducting materials.
The research team of Professor Akira Akira from the Faculty of Science and Engineering of Aoyama Gakuin University discovered a manganese diboride superconductor material. The superconducting transition temperature of this superconductor material when the resistance value drops to zero is as high as Tc=39K (-234"C).
This discovery rewrote the highest record of non-copper oxide superconducting material Tc. Mr. Qiu Guang equals 2001
A press conference was held on February 26 to announce the results of this research. Multiple studies in Japan and abroad
The agency "confirmed through additional tests" this fact (International Superconducting Industry Technology Center Superconducting Engineering
The second research director of the Institute, Setsuko Tajima, etc.). The higher the superconducting transition temperature, the more convenient it is to use.
The Tc of 39K is not particularly high. At present, humans have found high-temperature superconductors with a Tc of 134K<(-139°C)
(HgBa2Ca2Cu308). The reason why the new superconductor discovered this time has attracted people’s attention is that
It lies in the composition of the material. In the past, copper oxides were mostly used to obtain superconducting high temperatures. Due to copper oxide
It belongs to the category of ceramics, "difficult to process into a wire shape, so it has not been used until now" (Akihikari).
Compared with this, the metal compound manganese diboride has the following advantages.

(1) Manganese (Mg) and boron (B) are inexpensive and easily available. "This is the best combination for industrialization" (Qiu Guang). (2) Since the synthesis temperature is only 700°C, the manufacturing and processing costs are low.

(3) Even if it is processed into an alloy state containing Mg metal element and manganese diboride, the superconducting performance will not be impaired. (4) Since it is composed of only two elements, it is easy to synthesize into a thin film. "This material is closest to SQUID

(Superconducting Quantum Interference Element) Requirements".

Among the non-copper oxide superconductors in the past, Nb3 Ge (Tc= 23.2K), Y-Pd-BC (Tc=23K), etc., have been infiltrated in the past 27 years due to their low superconducting transition temperature. Cold Palace (Figure 3). However, there are also opinions that superconductivity


The transition temperature "39K is still too low" (Sumitomo Electric, etc.). "There are other ways to develop substances with higher Tc.

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