| abstract |
The present invention firstly solves both the problems of “discharge delay” and “temperature dependence of discharge delay” while realizing good driving at low voltage by modifying the protective layer. is there. Secondly, in addition to solving each of the above problems, a plasma display panel capable of exhibiting excellent display performance by suppressing “space charge dependency of discharge delay” is provided. For this reason, in the present invention, magnesium alkoxide (Mg (OR) 2) having a purity of 99.95% or more or magnesium acetylacetone is prepared, and a small amount of acid is added to this aqueous solution for hydrolysis to produce water that is an MgO precursor. Make a magnesium oxide gel. This is fired at 700 ° C. or higher in the air to produce a powder containing MgO fine particles (16a to 16d) having a NaCl crystal structure surrounded by the (100) plane (110) plane and the (111) plane. And the powder containing this is produced. And this is apply | coated on a dielectric material layer (7) or a surface layer (8), and MgO microparticles | fine-particles group (16) is formed. |