Abstract: The sintered magnesium oxide according to one embodiment has a density of less than 3.5 g/cm3 and an average grain size of about 3 to about 10 ?m. A MgO protective layer made from the sintered magnesium oxide reduces a discharge voltage of a plasma display panel, improves its response speed, and provides it with high-purity film quality.

Abstract: A material for preparing a protective layer for a PDP, which reduces discharge delay time, improves temperature dependency, and has enhanced ion strength; a method of preparing the same; a protective layer formed of the material; and a PDP including the protective layer. More particularly, a material for a protective layer that includes monocrystalline magnesium oxide doped with a rare earth element at an amount of 2.0×10?5?1.0×10?2 parts by weight per 1 part by weight of magnesium oxide (MgO), a method of preparing the monocrystalline magnesium oxide by crystallizing it at about 2,800° C., a protective layer formed of the same, and PDP including the protective layer.

Abstract: A sintered magnesium oxide has a density of 3.5 g/cm3 or more, and has a grain size that is more than or equal to thirty times the average particle diameter of magnesium oxide particles. An MgO protective layer made from the sintered magnesium oxide reduces a discharge voltage of a plasma display panel, improves response speed, and provides a high-purity film quality.

Abstract: An improved plasma display panel is provided that may reduce a discharge firing voltage while simultaneously improving discharge efficiency. The plasma display panel may include a first substrate substantially paralleling an opposite second substrate across a predetermined gap, wherein the gap is divided into a discharge cell. A phosphor layer may be formed in the discharge cell. An address electrode may be formed on the first substrate to extend along a first direction. A first electrode and second electrode may be formed on the first substrate, and a degree that a portion of at least one of the first electrode or the second electrode proximate the second substrate protrudes toward a center of the discharge cell may differ from a degree that another portion of the at least one of the first electrode or the second electrode proximate the first substrate protrudes toward the center of the discharge cell.

Abstract: A protecting layer of a Plasma Display Panel (PDP) is composed of metal and metal oxide. The metal is disposed away from the surface of the protecting layer by 10% or less than the thickness of the protecting layer. Furthermore, in a method of forming the protecting layer for a PDP and in a PDP employing the protecting layer, the metal is disposed away from the surface of the protecting layer by 10% or less than the thickness of the protecting layer.

Abstract: A protecting layer is formed of a magnesium oxide and at least one additional component selected from the group consisting of a copper component selected from copper and a copper oxide, a nickel component selected from nickel and a nickel oxide, a cobalt component selected from cobalt and a cobalt oxide, and an iron component selected from iron and an iron oxide; a composite for forming the protecting layer; a method of forming the protecting layer; and a plasma display panel including the protecting layer. The protecting layer, which is used in a PDP, protects an electrode and a dielectric layer from a plasma ion generated by a gaseous mixture of Ne and Xe, or He, Ne, and Xe, and discharge delay time and dependency of the discharge delay time on temperature can be decreased and sputtering resistance can be increased.

Abstract: Provided are a protective layer made of magnesium oxide containing at least one rare earth element selected from the group consisting of the rare earth elements, in which the content of the at least one rare earth element is from about 5.0×10?5 to about 6.0×10?4 per 1 part by weight of the magnesium oxide, a composite for forming the protective layer, a method of forming the protective layer, and a plasma display panel including the protective layer. The protective layer can reduce a discharge delay time and the temperature dependency of the discharge delay time, and thus, is suitable for single scan and an increase in Xe content.

Abstract: An improved plasma display panel is provided that may reduce a discharge firing voltage while simultaneously improving discharge efficiency. The plasma display panel may include a first substrate substantially paralleling an opposite second substrate across a predetermined gap, wherein the gap is divided into a discharge cell. A phosphor layer may be formed in the discharge cell. An address electrode may be formed on the first substrate to extend along a first direction. A first electrode and second electrode may be formed on the first substrate, and a degree that a portion of at least one of the first electrode or the second electrode proximate the second substrate protrudes toward a center of the discharge cell may differ from a degree that another portion of the at least one of the first electrode or the second electrode proximate the first substrate protrudes toward the center of the discharge cell.

Abstract: Herein is provided a protective layer for a plasma display panel and a method of forming the protective layer. The protective layer is formed on a substrate of the plasma display panel which includes sustain electrodes. Grain columns having directionality are formed in the texture of the protective layer. Because the direction of the grain columns can be controlled, the general orientation of the voids is known, and an electric field can be applied for discharge in a direction where the number of voids is smallest. As a result, the etching rate of the protective layer can be reduced, thereby increasing the lifetime of the protective layer. In addition, since discharge ions are less likely to impact the protective layer rapid emission of secondary electrons and reduced discharge delay time is realized. It is therefore possible to shorten the discharge delay time and to improve the breakdown voltage of discharge.

Abstract: Provided is a protective layer formed using at least one selected from the group consisting of a magnesium oxide and a magnesium salt and at least one selected from the group consisting of a lithium salt, a lithium oxide, a germanium oxide, and a germanium element. Provided is also a composition for forming a protective layer. When the composition is used for a protective layer of a gas discharge display device, an electrode or a dielectric can be protected from plasma ions generated by discharge of a mixed gas of Ne+Xe or He+Ne+Xe, a lower discharge voltage and a shorter discharge lag time can be obtained.