China develops superconducting tape

Read this with the following fact in mind: In today’s knowledge economies, a country who files for more patents annually has more chances to become a super power.

The Shanghai Jiao Tong University (SJTU) in China, has announced on Jan. 23 that its physics professor Li Yijie has successfully researched and developed 100 meters of second generation high-temperature superconducting tape with independently-owned intellectual property rights, which marks a breakthrough in the field of conductivity in China.

And possibly the world (if not in terms of novelty, then surely in terms of its practical use, as China masters the art of low cost manufacturing).

About the 2nd generation superconducting tape:

The tape is similar to a thin film; the second generation high-temperature superconducting tape developed by SJTU has a 1 centimeter metal base with 80 microns of thickness. But the notable thing is, the thickness of the rare earth oxide superconducting layer, used for the superconducting current transmission, was less than one micron, while its current carrying capacity of the same cross section areas is several hundred times higher than traditional copper wire.

Apart from the physical dimensions of the tape, what makes it remarkable is its capacity to be conducting at high temperatures; when science says any material becomes super conducting when its temperature going much below freezing point. In other words, conductivity is inversely proportional to temperature; that is lower the temperature of the conducting material, higher will be the conductivity and vice-versa.

Benefit of using this superconducting tape in power transmission system:

At present, the power transmission system loses 8 to 10 percent electric current during the transmission course. The loss is expected to be reduced to nearly zero if the high-temperature superconducting cable is adopted in the power transmission system.

China, just like US files thousands of patents annually. --------

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