JP2010080283A - Plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a PDP capable of high image quality, high brightness, and a wide color reproduction range even in an image display of a full-specification high vision display by improving discharge characteristics, simultaneously improving color purity of green color, and furthermore, achieving a green phosphor with little deterioration of light-emission efficiency. <P>SOLUTION: The plasma display panel has the panel body in which a pair of substrates having at least a transparent front substrate are oppositely arranged so as to form the discharge space between the substrates, barrier ribs in order to partition the discharge space into a plurality of discharge spaces is arranged at least on one substrate, and electrode groups are arranged on the substrate so that discharge is generated in the discharge space partitioned by the barrier rib, and the phosphor layer to emit light by discharge is installed. The phosphor layer has the green phosphor layer made of a mixture of Zn<SB>2</SB>SiO<SB>4</SB>:Mn and BaMgAl<SB>10</SB>O<SB>17</SB>:Mn, a surface of Zn<SB>2</SB>SiO<SB>4</SB>:Mn is coated with aluminum oxide, and the ratio of Al element to Si element within a region to a depth of 10 nm from the surface is made 0.1 or more. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a plasma display panel used for image display such as a television, and more particularly to a plasma display panel having a phosphor layer that emits light when excited by ultraviolet rays and a configuration of the phosphor layer.

  Plasma display panels (hereinafter referred to as PDPs) can achieve higher definition and larger screens, so full-spec high-definition televisions and large-sized public display devices in the 50-inch class to over 100-inch class are also available. Commercialization is progressing.

  The PDP is composed of a front plate and a back plate. The front plate is a glass substrate made of sodium borosilicate glass by a float method, a display electrode composed of a striped transparent electrode and a metal bus electrode formed on one main surface, and the display electrode A dielectric layer that covers and acts as a capacitor, and a protective layer made of magnesium oxide (MgO) formed on the dielectric layer. On the other hand, the back plate is a glass substrate provided with pores for exhaust and discharge gas encapsulation (also referred to as introduction), and stripe-shaped address electrodes (also referred to as data electrodes) formed on one main surface thereof, It is composed of a base dielectric layer that covers the address electrodes, a partition formed on the base dielectric layer, and a phosphor layer that emits red, green, and blue light formed between the partitions.

  The front plate and the back plate are opposed to each other on the electrode forming surface side, and the periphery thereof is sealed with a sealing material, and a mixed gas of Ne—Xe is used as a discharge gas in a discharge space of 400 Torr to 600 Torr. It is sealed with pressure. Then, the discharge gas is discharged by selectively applying a video signal voltage to the display electrodes, and the ultraviolet rays generated by the discharge excite the phosphor layers of each color to emit red, green, and blue light, thereby producing a color image. Display is realized.

The PDP performs full color display by additively mixing so-called three primary colors (red, green, and blue). In order to perform this full-color display, the PDP includes a phosphor layer that emits each of the three primary colors red, green, and blue. Phosphor layers of each color phosphor particle of each color are laminated, as the red phosphor particles (YGd) BO _3: Eu ³⁺ and ^{_{Y 2 O 3: Eu 3+,}} Zn as the green phosphor particles ₂ SiO ₄ : Mn ²⁺ and BaMgAl ₁₀ O ₁₇ : Eu ²⁺ are known as blue phosphor particles. Each of these phosphors is produced by a solid phase reaction method in which predetermined raw materials are mixed and then fired at a high temperature of 1000 ° C. or higher.

In addition, it is known that the green phosphor made of Zn ₂ SiO ₄ : Mn has a negatively charged surface, and therefore, when used in a PDP, the discharge characteristics are deteriorated.

In order to solve the above problems, a method of densely coating a negatively charged Zn ₂ SiO ₄ : Mn surface with a positively charged oxide until the polarity becomes positive has been proposed (for example, see Patent Document 1). ). Moreover, a method of using a mixture of negatively charged Zn ₂ SiO ₄ : Mn and a positively charged green phosphor is disclosed (for example, see Patent Document 2).
Japanese Patent Laid-Open No. 9-248859 JP 2000-292069 A

  By the way, in the recent high-definition full-definition high-definition television, the pixels are 1920 (horizontal) × 1080 (vertical), which is about 6 times the number of pixels of conventional NTSC 852 (horizontal) × 480 (vertical). To increase. Accordingly, since the time required for address discharge per pixel is shortened, there is a problem that the allowable range of discharge characteristics is narrowed and the image quality of the plasma display panel is lowered.

  Here, when trying to solve such a problem by the method disclosed in the aforementioned patent document, there are the following problems, respectively.

That is, in the method of coating a positively charged oxide on the surface of Zn ₂ SiO ₄ : Mn phosphor, ultraviolet light generated by the discharge is absorbed by the non-light emitting oxide on the phosphor surface, so that the luminous efficiency is reduced. There are challenges. In the method of mixing the Zn ₂ SiO ₄ : Mn phosphor with another green phosphor, the YBO ₃ : Tb phosphor, which is a commonly used green phosphor having a positive charge, is Zn ₂ SiO ₄ : Mn. The color purity of the green color is lower than that of the phosphor surface, and use of the mixture causes a decrease in color purity.

  The present invention has been made in view of such a current situation. By improving the discharge characteristics and at the same time improving the green color purity, and further realizing a green phosphor with a very low decrease in luminous efficiency, a full-spec high-definition image can be obtained. It is an object of the present invention to provide a PDP that can realize high image quality, high luminance, and a wide color reproduction range even in display.

In order to achieve the above object, the PDP of the present invention solves the above-described problems, and the plasma display device of the present invention has a pair of substrates that are transparent at least on the front side so that a discharge space is formed between the substrates. In addition, a partition for partitioning the discharge space into a plurality is disposed on at least one substrate, and an electrode group is disposed on the substrate so that discharge is generated in the discharge space partitioned by the partition, and fluorescence is emitted by the discharge. a plasma display device having a panel body having a body layer, the phosphor layer, Zn ₂ SiO _4: Mn and BaMgAl ₁₀ O _17: includes a green phosphor layer consisting of a mixture of Mn, the Zn ₂ SiO _4: the ratio of Al element to Si element in the within surface 10nm with magnesium oxide on the surface of the Mn is coated 0.1 It is obtained by a configuration in which the above.

  According to the present invention, it is possible to realize a green phosphor that improves the discharge characteristics and at the same time improves the color purity of the green, and further reduces the luminous efficiency very little. A PDP capable of realizing a wide color reproduction range can be provided.

  Hereinafter, a PDP according to an embodiment of the present invention will be described with reference to the drawings. However, the embodiment of the present invention is not limited to this.

<1. Configuration>
FIG. 1 is a plan view showing a schematic configuration of electrodes in a PDP according to an embodiment of the present invention. The PDP 100 includes a front glass substrate (not shown), a rear glass substrate 102, a sustain electrode 103, a scan electrode 104, an address electrode 107, and an airtight seal layer 121. N sustain electrodes 103 and scan electrodes 104 are arranged in parallel. M address electrodes 107 are arranged in parallel. The sustain electrode 103, the scan electrode 104, and the address electrode 107 have an electrode matrix having a three-electrode structure, and a discharge cell is formed at the intersection of the scan electrode 104 and the address electrode 107.

  FIG. 2 is a partial cross-sectional perspective view showing a schematic configuration of an image display area in the PDP according to the embodiment of the present invention. The PDP 100 includes a front panel 130 and a back panel 140. A sustain electrode 103, a scan electrode 104, a dielectric glass layer 105, and an MgO protective layer 106 are formed on the front glass substrate 101 of the front panel 130. On the rear glass substrate 102 of the rear panel 140, address electrodes 107, a base dielectric glass layer 108, barrier ribs 109, and phosphor layers 110R, 110G, and 110B are formed.

  Then, the front panel 130 and the back panel 140 are bonded together, and the discharge gas is sealed in the discharge space 122 formed between the front panel 130 and the back panel 140, thereby completing the PDP 100.

  FIG. 3 is a block diagram schematically showing a schematic configuration of a PDP apparatus using the PDP 100 according to the embodiment of the present invention.

  The PDP 100 is connected to the driving device 150 to constitute a PDP device. A display driver circuit 153, a display scan driver circuit 154, and an address driver circuit 155 are connected to the PDP 100. The controller 152 controls the application of these voltages. Address discharge is performed by applying a predetermined voltage to the scan electrodes 104 and the address electrodes 107 corresponding to the discharge cells to be lit. The controller 152 controls this voltage application. Thereafter, a sustain discharge is performed by applying a pulse voltage between sustain electrode 103 and scan electrode 104. Due to the sustain discharge, ultraviolet rays are generated in the discharge cells in which the address discharge has been performed. The discharge cell is turned on when the phosphor layer excited by the ultraviolet light emits light. An image is displayed by a combination of lighting and non-lighting of each color cell.

  Next, a method for manufacturing the PDP 100 will be described with reference to FIGS. First, a method for manufacturing the front panel 130 will be described. On the front glass substrate 101, N sustain electrodes 103 and scan electrodes 104 are formed in stripes. Thereafter, sustain electrode 103 and scan electrode 104 are coated with dielectric glass layer 105. Further, an MgO protective layer 106 is formed on the surface of the dielectric glass layer 105.

The sustain electrode 103 and the scan electrode 104 are formed by applying a silver paste for an electrode containing silver as a main component by screen printing, followed by baking. The dielectric glass layer 105 is formed by applying a paste containing a bismuth oxide glass material by screen printing and then baking. The paste containing the glass material is, for example, 30 wt% bismuth oxide (Bi ₂ O ₃ ), 28 wt% zinc oxide (ZnO), 23 wt% boron oxide (B ₂ O ₃ ), and 2.4 wt%. % Silicon oxide (SiO ₂ ) and 2.6% by weight aluminum oxide. Further, it is formed by mixing 10% by weight of calcium oxide (CaO), 4% by weight of tungsten oxide (WO ₃ ) and an organic binder (a solution of 10% ethyl cellulose in α-terpineol). Here, the organic binder is obtained by dissolving a resin in an organic solvent. In addition to ethyl cellulose, an acrylic resin can be used as the resin, and butyl carbitol can be used as the organic solvent. Furthermore, you may mix a dispersing agent (for example, glyceryl trioleate) in such an organic binder.

  The coating thickness of the dielectric glass layer 105 is adjusted so as to have a predetermined thickness (about 40 μm). The MgO protective layer 106 is made of magnesium oxide (MgO), and is formed to have a predetermined thickness (about 0.5 μm) by, for example, a sputtering method or an ion plating method.

  Next, a method for manufacturing the back panel 140 will be described. On the back glass substrate 102, silver paste for electrodes is screen-printed and baked to form M address electrodes 107 in stripes. A paste containing a bismuth oxide glass material is applied on the address electrode 107 by a screen printing method and then baked to form a base dielectric glass layer 108. Similarly, a paste containing a glass material based on bismuth oxide is repeatedly applied at a predetermined pitch by a screen printing method and then baked to form partition walls 109. The discharge space 122 is partitioned by the barrier ribs 109 to form discharge cells. The distance between the barrier ribs 109 is set to about 130 μm to 240 μm in accordance with a full HD television of 42 inches to 50 inches and an HD television.

A red phosphor layer 110R, a green phosphor layer 110G, and a blue phosphor layer 110B are formed in a groove between two adjacent barrier ribs 109. The red phosphor layer 110R is made of, for example, a red phosphor material of (Y, Gd) BO ₃ : Eu. The blue phosphor layer 110B is made of, for example, a blue phosphor material of BaMgAl ₁₀ O ₁₇ : Eu. The green phosphor layer 110G is composed of a green phosphor material of Zn ₂ SiO ₄ : Mn and BaMgAl ₁₀ O ₁₇ : Mn.

  The front panel 130 and the back panel 140 manufactured in this way are overlapped facing each other so that the scanning electrode 104 of the front panel 130 and the address electrode 107 of the back panel 140 intersect. A glass for sealing is applied to the peripheral part and baked at about 450 ° C. for 10 to 20 minutes, thereby forming an airtight seal layer 121 and sealing the front panel 130 and the back panel 140 as shown in FIG. To do.

  Then, after evacuating the discharge space 122 to a high vacuum, a discharge gas (for example, helium-xenon-based or neon-xenon-based inert gas) is sealed at a predetermined pressure to complete the PDP 100.

<2. Manufacturing method of phosphor of the present embodiment>
Next, a method for manufacturing each color phosphor material will be described. In the present embodiment, a phosphor material manufactured by a solid phase reaction method is used.

BaMgAl ₁₀ O ₁₇ : Eu, which is a blue phosphor material, is produced by the following method. Barium carbonate (BaCO ₃ ), magnesium carbonate (MgCO ₃ ), aluminum oxide, and europium oxide (Eu ₂ O ₃ ) are mixed so as to match the phosphor composition. The mixture is fired at 800 ° C. to 1200 ° C. in air, and further fired at 1200 ° C. to 1400 ° C. in a mixed gas atmosphere containing hydrogen and nitrogen.

The red phosphor material (Y, Gd) BO ₃ : Eu is produced by the following method. Yttrium oxide (Y ₂ O ₃ ), gadolinium oxide (Gd ₂ O ₃ ), boric acid (H ₃ BO ₃ ), and europium oxide (EuO ₂ ) are mixed so as to match the phosphor composition. The mixture is fired at 600 ° C. to 800 ° C. in air, and further fired at 1100 ° C. to 1300 ° C. in a mixed gas atmosphere containing oxygen and nitrogen.

Next, the green phosphor material will be described. In the PDP according to an embodiment of the present invention, the surface of Zn ₂ SiO ₄ : Mn (hereinafter referred to as uncoated Zn ₂ SiO ₄ : Mn) whose surface is not coated with a substance is oxidized as a green phosphor material. Use the one coated with magnesium. Magnesium oxide is, Zn ₂ SiO _4: In less near the surface 10nm of Mn, Al element and Zn ₂ SiO _4: The ratio of the Si element constituting a phosphor material of Mn (hereinafter, referred to as Al / Si ratio) The coating is controlled so as to be 0.1 or more.

  Here, the Al / Si ratio can be measured with an XPS apparatus. XPS is an abbreviation for X-ray Photoelectron Spectroscopy, which is called X-ray photoelectron spectroscopy, and is a method for examining the state of elements up to 10 nm near the surface of a substance. The Al / Si ratio is a value obtained by analyzing Al and Si using an XPS apparatus and taking the ratio.

Hereinafter, a method for manufacturing a green phosphor material in a PDP according to an embodiment of the present invention will be described in detail. Uncoated Zn ₂ SiO ₄ : Mn is produced using a conventional solid phase reaction method, liquid phase method, or liquid spray method. The solid phase reaction method is a method in which an oxide or carbonate raw material and a flux are fired. The liquid phase method is a method in which a precursor of a phosphor material formed by hydrolyzing an organic metal salt or nitrate in an aqueous solution and adding an alkali or the like as necessary to precipitate is heat-treated. The liquid spray method is a method in which an aqueous solution containing a phosphor material is sprayed into a heated furnace.

The uncoated Zn ₂ SiO ₄ : Mn used in this embodiment is not particularly affected by the manufacturing method, but here, a manufacturing method by a solid phase reaction method will be described as an example. Zinc oxide, silicon oxide, manganese dioxide (MnO ₂ ) is used as a raw material.

Zinc oxide and silicon oxide, which are raw materials constituting the composition Zn ₂ SiO ₄ of the base material of the phosphor material, are mixed. Mixing is performed such that silicon oxide is in excess of the stoichiometric ratio, and the excess is 0.1 mol% or more and 5 mol% or less. Next, 5 to 20 mol% of manganese dioxide serving as an emission center is added to and mixed with Zn ₂ SiO ₄ : Mn. The mixing amount of zinc oxide is appropriately adjusted so that the total of zinc oxide and manganese dioxide is 200 mol% with respect to Zn ₂ SiO ₄ : Mn.

Next, this mixture is baked at 600 ° C. to 900 ° C. for 2 hours. The fired mixture is lightly crushed and sieved, and fired at 1000 ° C. to 1350 ° C. in nitrogen or in a mixed atmosphere of nitrogen and hydrogen to produce uncoated Zn ₂ SiO ₄ : Mn.

The reason why silicon oxide is added in excess of the stoichiometric ratio is that the negative chargeability of the surface is increased by increasing the ratio of silicon oxide, and the adhesion by the aluminum cation described below is increased. This is because the aluminum coat becomes strong. However, if it exceeds 5 mol%, the brightness of Zn ₂ SiO ₄ : Mn is lowered, and if it is less than 0.1 mol%, no effect is exhibited. Therefore, the excess mixing amount of silicon oxide is preferably 0.1 mol% or more and 5 mol% or less.

Then non-coated Zn ₂ SiO _4: illustrates a method of coating the aluminum oxide on the surface of the Mn.

Aluminum nitrate is dissolved in water or an aqueous alkaline solution at a concentration of 0.2% by weight. Uncoated Zn ₂ SiO ₄ : Mn is added to the solution to prepare a mixed solution, which is stirred while being heated. When the heating temperature is less than 30 ° C., the metal salt is precipitated in the solution. At a temperature exceeding 60 ° C., Zn ₂ SiO ₄ : Mn is dissolved by acid or alkali. For this reason, it heats in the temperature range of 30 degreeC or more and 60 degrees C or less. By this stirring, the aluminum cation in the solution is in close contact with the negatively-charged uncoated Zn ₂ SiO ₄ : Mn for coating.

The mixture is filtered and dried. Thereafter, the dried product is fired at 400 ° C. to 800 ° C. in the air to produce Zn ₂ SiO ₄ : Mn (hereinafter referred to as Al-coated Zn ₂ SiO ₄ : Mn) whose surface is coated with aluminum oxide. To do. The Al / Si ratio of this Al coat Zn ₂ SiO ₄ : Mn is 0.5.

Next, BaMgAl ₁₀ O ₁₇ : Mn, which is the other green fluorescence, is produced by the following method. Barium carbonate (BaCO ₃ ), magnesium carbonate (MgCO ₃ ), aluminum oxide, and manganese dioxide (MnO ₂ ) are mixed so as to match the phosphor composition. The mixture is fired at 800 ° C. to 1200 ° C. in air, and further fired at 1200 ° C. to 1400 ° C. in a mixed gas atmosphere containing hydrogen and nitrogen.

The aluminum oxide coated Zn ₂ SiO ₄ : Mn produced in this way is mixed at a weight ratio of 80% and BaMgAl ₁₀ O ₁₇ : Mn at a weight ratio of 20% to produce a green phosphor.

<3. Actual machine evaluation test>
(Luminance evaluation)
A green phosphor layer 110G is formed by stacking green phosphors, and the PDP 100 is manufactured. A driving device 150 is connected to the PDP 100 to produce a PDP device. In this PDP apparatus, only the green phosphor layer is caused to emit light, and the luminance is measured.

  Each luminance is expressed as a relative value when the luminance of the comparative product 1 as a conventional product is set to 100, and if this relative luminance is 95 or more, it was determined that it can be used practically without any problem.

(Color gamut evaluation)
The color reproduction range is an area of a triangle formed when the PDP device draws the chromaticity when red, green, and blue are emitted in a single color on the xy chromaticity coordinates.

  Each color reproduction range is expressed as a relative value when the color reproduction range of the comparative product 1 as a conventional product is set to 100, and when this relative color reproduction range is 101 or more, there is an effect of expanding the color reproduction range. It was determined.

(Address discharge evaluation)
In the above PDP device, when 500 address discharges are tried, the number of times that address discharge fails and sustain discharge does not occur is measured.

  When the address discharge failure frequency was 5 or less, it was determined that the address discharge characteristics in the PDP had an improvement effect.

(Specifications and performance evaluation results for each test object)
Table 1 shows the compositions and performance evaluation results of the phosphors of Example products 1 to 8 and Comparative products 1 to 3.

Each test object shown below, that is, a comparative product and an example product, are different in the Al / Si ratio of Al-coated Zn ₂ SiO ₄ : Mn and the mixing ratio of BaMgAl ₁₀ O ₁₇ : Mn.

  The example product 1 has the same configuration as the green phosphor described in the present embodiment, and the comparative product 1 has the same configuration as the conventional phosphor (conventional product).

As shown in Table 1, in each of Examples 1 to 8, the Al-coated Zn ₂ SiO ₄ : Mn has a surface Al / Si ratio of 0.1 or more, and BaMgAl ₁₀ O ₁₇ : Mn is mixed. ing. In these example products 1 to 8, the number of address discharge failures is 5 or less, and the image quality is not impaired practically.

On the other hand, in the comparative product 1, Al coating is not applied to Zn ₂ SiO ₄ : Mn, and BaMgAl ₁₀ O ₁₇ : Mn is not mixed. Moreover, Comparative Product 2, Zn ₂ SiO _4: relative Mn, although the surface Al / Si is subjected to Al coating to be 0.5, BaMgAl ₁₀ O _17: Mn not be mixed. In Comparative product 3, BaMgAl ₁₀ O ₁₇ : Mn is mixed in an amount of 50 wt%, but no Al coating is applied to Zn ₂ SiO ₄ : Mn.

  In these comparative products 1 to 3, the number of address discharge failures is more than 5 and there is a problem of impairing image quality practically.

Moreover, among example products, the mixing ratio of BaMgAl ₁₀ O ₁₇ : Mn is 5 to 50 wt%, and the surface Al / Si ratio of Al-coated Zn ₂ SiO ₄ : Mn is 0.1 or more and 3.0 or less. In the example products 1 to 5, the relative luminance with respect to the comparative product 1 is 95% or more, and the color reproduction range is also 101% or more compared to the comparative product 1.

Therefore, the address discharge is achieved when the mixing ratio of BaMgAl ₁₀ O ₁₇ : Mn is 5 to 50 wt% and the surface Al / Si ratio of the Al coating Zn ₂ SiO ₄ : Mn is 0.1 or more and 3.0 or less. It is possible to improve the characteristics, and at the same time, it is possible to expand the color reproduction range while suppressing a decrease in luminance to an extent that there is no practical problem.

As described above, according to the PDP of the present invention, at least one of the pair of substrates transparent at least on the front side is disposed so as to form a discharge space between the substrates, and at least one partition wall for partitioning the discharge space is divided into a plurality of A plasma display device having a panel body provided with a phosphor layer that is disposed on a substrate and has an electrode group disposed on the substrate so that a discharge is generated in a discharge space partitioned by the barrier ribs and emits light by discharge, The phosphor layer includes a green phosphor layer made of a mixture of Zn ₂ SiO ₄ : Mn and BaMgAl ₁₀ O ₁₇ : Mn, and the surface of the Zn ₂ SiO ₄ : Mn is coated with magnesium oxide and has a surface of 10 nm. In the structure, the ratio of Al element to Si element is 0.1 or more, and it is stable without decreasing the luminous efficiency of the green phosphor. It is possible to realize a PDP having conductive properties and a wide color reproduction range.

Furthermore, the BaMgAl ₁₀ O _17: the mixing ratio of Mn is 5-50 wt%, and the Zn ₂ SiO _4: 0.1 or more the ratio of Al element to Si element in the within surface 10nm of Mn 3.0 or less Thus, a PDP having high luminous efficiency and stable discharge characteristics can be realized.

  As described above, the present invention is useful for providing a large-screen, high-definition plasma display device.

The top view which shows schematic structure of the electrode in PDP by one embodiment of this invention The partial cross section perspective view which shows schematic structure of the image display area | region in PDP by one embodiment of this invention The block diagram which shows typically schematic structure of the PDP apparatus using PDP by one embodiment of this invention

Explanation of symbols

100 PDP
DESCRIPTION OF SYMBOLS 101 Front glass substrate 102 Back glass substrate 103 Sustain electrode 104 Scan electrode 105 Dielectric glass layer 106 MgO protective layer 107 Address electrode 108 Base dielectric glass layer 109 Partition 110R Phosphor layer (red phosphor layer)
110G phosphor layer (green phosphor layer)
110B phosphor layer (blue phosphor layer)
121 Airtight Seal Layer 122 Discharge Space 130 Front Panel 140 Rear Panel 150 Drive Device 152 Controller 153 Display Driver Circuit 154 Display Scan Driver Circuit 155 Address Driver Circuit

Claims (2)

A pair of substrates transparent at least on the front side are arranged opposite to each other so that a discharge space is formed between the substrates, and a partition for partitioning the discharge space is arranged on at least one substrate, and the partition is partitioned by the partition with discharge was discharge space to place electrodes on the substrate to generate, a plasma display panel having a phosphor layer which emits light by discharge, the phosphor layer, Zn ₂ SiO _4: Mn and A green phosphor layer made of a mixture of BaMgAl ₁₀ O ₁₇ : Mn is provided, the surface of the Zn ₂ SiO ₄ : Mn is coated with aluminum oxide, and the ratio of Al element to Si element is 0.1 in the surface within 10 nm. A plasma display panel having one or more. The mixture ratio of BaMgAl ₁₀ O ₁₇ : Mn in the mixture is 5 to 50 wt%, and the ratio of Al element to Si element is 3.0 or less within the surface of Zn ₂ SiO ₄ : Mn within 10 nm. The plasma display panel according to claim 1, wherein:

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