Purchase magnesium and boron samples with 99.99 percent purity. Weigh, using the analytical balance, one mole of magnesium powder to 2 moles of Boron power. One mole of Mg weighs 24.31 grams and two moles of Boron weighs 21.62 grams.
Mix the weighed portions of magnesium and boron in a glovebox mortar and grind them to an intimate sample in an atmosphere of argon.
Convert the mixed powder into pellets using a manual pelleting press machine. Obtain many pellet samples about 2mm thick.
Wrap pellets with Tantalum foil. Place in a quartz tube flushed of air with argon gas at very high pressure of up to 196 megapascal (mpa). Seal the tube with a sealing machine.Place in a hot isostatic press (HIP) furnace. Heat to 973 degrees Celsius for at least 10 hours.
Turn off the furnace, and slowly cool sample to room temperature. Cut open the tube and bring out a sample pellet for testing for superconductivity.
Plunge the sample in liquid helium to cool for 30 minutes. Test for superconductivity by placing a small thin disk magnet over a dewar containing the sample. The magnet will be repelled if the sample is superconducting. Otherwise, regrind the other samples, pellet them and repeat the heating process for another 20 hours.