Plasma display panel

A plasma display panel comprising:

• a pair of substrate assemblies opposed to each other sandwiching discharge spaces formed to seal a discharge gas therein,
• one of the pair of substrate assemblies including:
• display electrodes arranged on a substrate;
• a dielectric layer covering the display electrodes;
• and
• a protective layer covering the dielectric layer,
• wherein the protective layer includes MgO single crystals uniformly distributed on an MgO film,
• the MgO single crystals have crystal orientations that are aligned in one direction such that an intensity of X-ray diffraction signals at a (200) crystal face after normalization is the same as or more than an intensity of X-ray diffraction signals at a (111) crystal face per micron of the MgO film,
• the MgO single crystals have a grain size of 0.6 μm or more at 50% of a cumulative percentage in a grain size distribution, and
• the MgO single crystals have a grain size at 10% of a cumulative percentage in the grain size distribution that is 0.5 times or more of the grain size at 50% of a cumulative percentage.