  We have successfully prepared the MgB2 superconducting bulk and powdered
materials by the method of combustion synthesis. The starting materials used in
this study were powders of Mg and B. X-ray powder diffraction pattern was well
assigned to the P6/mmm MgB2 phase. The temperature dependence of magnetization
shows sharp superconducting transition around 38K. The critical current density
can be estimated from the hysteresis of the magnetization curvature using the
Bean's model. The powdered sample shows a high critical current density of
2x10^6 A/cm2 at 5K under the magnetic field of 1T.
