JP2003226549A - Electrode material, dielectric material, electrode paste, dielectric paste and plasma display panel using them - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide paste which can be used for the electrode and dielectric layer of a plasma display panel (PDP), and can reduce the occurrence of yellowing, and to provide a PDP of high-image quality using the paste. <P>SOLUTION: The electrode and dielectric layer of the plasma display panel are formed by using glass powder containing, by weight, 25 to 50% Bi<SB>2</SB>O<SB>3</SB>, 5 to 35% B<SB>2</SB>O<SB>3</SB>, 10 to 20% ZnO, 5 to 20% BaO, 0 to 15% SiO<SB>2</SB>, and 0 to 10% Al<SB>2</SB>O<SB>3</SB>. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paste that can be used for an electrode and a dielectric layer of a plasma display panel, and a plasma display panel using the paste.

[0002]

2. Description of the Related Art A high-definition, thin, large-sized plasma display panel (hereinafter, also referred to as PDP) has received a great deal of attention in fields such as office automation equipment, information display devices and high-definition television. 1 and 2
The display principle of the conventional PDP will be described with reference to. Figure 1
Shows a schematic partial sectional view of the front surface side of the plasma display panel, and FIG. 2 shows a schematic partial sectional view of the rear surface side of the plasma display panel.

First, ultraviolet rays are generated by discharging plasma between two display electrodes 3 provided on the front surface glass substrate 1 serving as a display surface, and the ultraviolet rays are generated by the partition walls 9 on the rear glass substrate 2. The phosphors 6 separated from each other are excited to generate visible light. The generated visible light passes through the MgO film 10, the surface dielectric layer 7 and the surface glass substrate 1 and is displayed as an image. At this time, the rear glass substrate 2
An image is displayed by applying a signal to the address electrode 5 provided in the cell and designating which discharge cell is to be displayed. In this case, a plurality of linear electrodes are arranged in parallel on the front glass substrate 1 and the rear glass substrate 2,
Display electrode 3 on front surface glass substrate 1 and rear glass substrate 2
The upper address electrode 5 is overlapped with the linear electrodes so as to face each other to form a PDP.

The display electrode 3 of the surface glass substrate 1 is formed by applying an electrode paste on the transparent electrode 4 of the substrate by using a screen printing method, a photolithography method or a lift-off method, and then firing the electrode. It The surface dielectric layer 7 is provided to ensure insulation between the electrodes and to generate and maintain plasma. The dielectric paste is applied by a screen printing method, a bar coater method, a roll coater method, a roll coater. Method, a blade coater method, a die coater method, or the like, and is applied on the display electrode 3 and dried and baked to be formed. The rear glass substrate 2 also has an address electrode 5 and a rear dielectric layer 8 as a protective film for the address electrode 5, which are formed in the same manner as in the case of the surface dielectric layer 7. In such a conventional PDP, Ag is used as a conductive metal forming an electrode (for example, Patent Document 1).

[0005]

[Patent Document 1] Japanese Patent Laid-Open No. 11-283508

[0006]

However, in this case, after firing to obtain the electrode, the dielectric layer and the MgO film, the phenomenon that the glass substrate or the dielectric layer turns yellow (yellowing) occurs. However, there is a problem that the image quality of the PDP is significantly deteriorated. In particular, the occurrence of yellowing on the surface glass substrate, which is the display surface, is a serious problem, and this problem becomes more remarkable in high-definition patterns such as high-definition TV. Therefore, an object of the present invention is to solve the above-mentioned problems, that is, a paste that can be used for an electrode and a dielectric layer of a PDP and can reduce the occurrence of yellowing, and a high-quality paste using the paste. To provide PDP.

[0007]

The present invention comprises Ag powder,
25 to 50 wt% Bi ₂ O ₃ , 5 to 35 wt% B
₂ O ₃ , 10-20 wt% ZnO, 5-20 wt% B
aO, 0-15 wt% SiO ₂ and 0-10 wt%
The present invention provides an electrode material for a plasma display panel, which comprises a glass powder containing Al ₂ O ₃ .

The glass powder preferably has an average particle size of 4.0 μm or less and a maximum particle size of 10 μm or less. The present invention also provides an electrode paste for a plasma display panel, which comprises the above electrode material and an organic component containing a resin and a solvent.

Further, the present invention provides 25 to 50 wt% Bi.
₂ O ₃ , 5 to 35 wt% B ₂ O ₃ , 10 to 20 wt% Z
nO, 5 to 20 wt% BaO, 0 to 15 wt% Si
There is provided a dielectric material for a plasma display panel, which comprises glass powder containing O ₂ and 0 to 10% by weight of Al ₂ O ₃ .

In this case, the glass powder is 25-40
Wt% Bi ₂ O ₃ , 15-35 wt% B ₂ O ₃ , 10-
20 wt% ZnO, 10-20 wt% BaO, 0
10 wt% SiO ₂ and 0-10 wt% Al ₂ O ₃
It is preferable to include The glass powder further contains 0.1
It is preferred to contain ˜2 wt% CuO. The present invention also provides a dielectric paste for a plasma display panel, which comprises the above dielectric material and an organic component containing a resin and a solvent.

The present invention also relates to the first glass and Ag.
At least one of the first glass and the second glass is 25 to 50% by weight of Bi ₂ and a dielectric layer that includes a second glass and insulates between the electrodes. O _3, 5 to 35 wt% of B ₂ O _3, 10~20 wt%
Of ZnO, 5 to 20% by weight of BaO, 0 to 15% by weight of SiO ₂ and 0 to 10% by weight of Al ₂ O ₃ are provided.

The second glass preferably contains 15 to 35% by weight of B ₂ O ₃ . Further, it is preferable that the second glass further contains 0.1 to 2% by weight of CuO.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION (1) PDP Electrode Material and Paste The PDP electrode material according to the present invention contains Ag powder and
50 wt% Bi ₂ O ₃ , 5 to 35 wt% B ₂ O ₃ , 10
~ 20 wt% ZnO, 5-20 wt% BaO, 0
15 wt% SiO ₂ and 0-10 wt% Al ₂ O ₃
And a glass powder containing. Further, an electrode paste for PDP according to the present invention comprises the above electrode material,
It is characterized by containing an organic component including a resin and a solvent.

Examples of the Ag powder include AG-4-8 and AG-5-7 manufactured by Dowa Mining Co., Ltd., and SPQ08S manufactured by Mitsui Kinzoku Co., Ltd. Regarding the particle size of Ag powder, the average particle size is 1 to 5 μm.
Therefore, the maximum particle size is preferably 20 μm or less.

The glass powder, expressed in terms of oxide, contains 25 to 50% by weight of Bi ₂ O ₃ and 5 to 35% by weight of B.
₂ O ₃ , 10-20% by weight ZnO and 5-20% by weight
Of BaO as an essential component and 0 to 15% by weight of Si
O ₂ and 0-10% by weight of Al ₂ O ₃ containing as an optional component. Conditions required for the glass powder used for the electrode of the PDP are low reactivity with Ag that constitutes them, excellent thermal expansion coefficient and excellent matching with the glass substrate, and dielectric layer and It is possible to perform firing at 500 to 600 ° C., which is higher than that of the MgO film.

Glass used in conventional PDPs
As the powder, for example, PbO₂, B₂O₃, SiO₂Including
Lead-based glass and PbO₂, B₂O₃, SiO₂, Al
₂O ₃YFT340 containing lead, BaO and CuO
(Manufactured by Asahi Glass Co., Ltd.) and the like, and these are glass.
Between the substrate and the Ag electrode, and between the dielectric layer and the Ag electrode
There was a problem that it turned yellow between.

On the other hand, the present inventors have found that in glasses containing Bi ₂ O ₃ as a main component, Bi ₂ O ₃ and B ₂ O ₃
The inventors have found that the above-mentioned conditions can be satisfied by adjusting the amount of the above, and yellowing when used as an electrode paste for PDP can be reduced, and have completed the present invention.

If the amount of Bi ₂ O ₃ is too large, the coefficient of thermal expansion increases and the softening point decreases, so that it is 25 to 5
It is preferably 0% by weight. Further, it is more preferably 30 to 45% by weight. Further, B ₂ O ₃ forming the glass skeleton is preferably 5 to 35 wt% from the viewpoint that the thermal expansion coefficient decreases and the softening point increases when the amount is too large. Further, it is more preferably 5 to 30% by weight.

Further, if the amount of ZnO is too large, the coefficient of thermal expansion increases and the transparency is impaired.
It is preferably 20% by weight. Further, BaO is 5 to 5 from the viewpoint that the softening point becomes high when the amount is too large.
It is preferably 20% by weight.

Further, SiO ₂ which is an optional component forming the glass skeleton is preferably 0 to 15% by weight from the viewpoint that the softening point becomes high if the amount is too large. Further, Al ₂ O _3, which is another optional component, is preferably 0 to 10% by weight from the viewpoint that the softening point becomes high when the amount is too large.

The average particle size of the glass powder is because it improves the binding property between the Ag electrode and the glass substrate.
It is preferably 4.0 μm or less. Furthermore, 1-3
More preferably, it is μm. The maximum particle size of the glass powder is preferably 10 μm or less in order to achieve a good balance between the binding force and the straightness of the edge of the Ag electrode. Furthermore, it is more preferably 5 to 8 μm.

Next, the organic components contained in the electrode paste according to the present invention will be described. This organic component contains a solvent and a resin (binder). Examples of the solvent include terpenes such as α-, β-, γ-terpineol, ethylene glycol monoalkyl ethers, ethylene glycol dialkyl ethers, diethylene glycol monoalkyl ethers, diethylene glycol dialkyl ethers, ethylene glycol monoalkyl ether. Acetates, ethylene glycol dialkyl ether acetates, diethylene glycol monoalkyl ether acetates, diethylene glycol dialkyl ether acetates, propylene glycol monoalkyl ethers, propylene glycol dialkyl ethers, propylene glycol monoalkyl ether acetates, propylene glycol dialkyl ether acetates , Methanol, ethanol, a Propanol, 1-butanol include such alcohols such as may be used by mixing them each alone or two or more types.

Examples of the resin include cellulose resins such as nitrocellulose, ethyl cellulose and hydroxyethyl cellulose, acrylic resins such as polybutyl acrylate and polymethacrylate, acrylic copolymers, polyvinyl alcohol and polyvinyl butyral. These may be used alone or in admixture of two or more.

Furthermore, if necessary, the electrode paste according to the present invention contains a dispersant, a plasticizer, a viscosity modifier, an oligomer, a polymer, an ultraviolet absorber, a photosensitive monomer, and the like, as long as the effects of the present invention are not impaired. Additives such as a photopolymerization initiator and a sensitizer can also be added.

In the electrode paste according to the present invention, the mixing ratio (weight ratio) of Ag, powder glass, solvent and resin is 60: Ag: powder glass: solvent: resin.
70: 2-5: 15-20: 10-15 (total 100)
Is preferred. In particular, Ag: powdered glass: solvent:
The resin is preferably 67: 3: 18: 12. The electrode paste according to the present invention can be obtained by mixing and dispersing these components using a disperser such as a three-roller, a ball mill or a sand mill.

Further, in order to form an electrode in a PDP, the electrode paste thus obtained may be applied onto a glass substrate by, for example, a screen printing method, a photolithography method or a lift-off method. . Drying and firing can be appropriately performed by those skilled in the art based on conventional techniques.

(2) Dielectric Material for PDP and Paste The dielectric material for PDP according to the present invention is 25 to 50% by weight.
Bi ₂ O ₃ , 5 to 35% by weight B ₂ O ₃ , 10 to 20% by weight ZnO, 5 to 20% by weight BaO, 0 to 15% by weight
SiO ₂ and glass powder containing 0-10 wt% Al ₂ O ₃ . A dielectric paste according to the present invention is characterized by including the above dielectric material and an organic component containing a resin and a solvent.

The glass powder contains 25 to 50% by weight of B.
i ₂ O ₃ , 5 to 35 wt% B ₂ O ₃ , 10 to 20 wt% ZnO and 5 to 20 wt% BaO as essential components, and 0 to 15 wt% SiO ₂ and 0 to 10 wt% %
Al ₂ O ₃ is included as an optional component. The conditions required for the glass powder used for the dielectric of PDP are excellent light transmittance, having an optimum dielectric constant, and optimal thermal expansion to prevent cracking of the dielectric itself and substrate. , And having an optimum softening point so that it can be sintered at a constant temperature.

As described above, the present inventors have found an electrode paste suitable for PDP, but have also found that the glass powder used for this can also be suitably used for the dielectric of PDP. The composition of the glass powder used for the dielectric paste may be the same as the composition of the glass powder used for the electrode paste, but the content of B ₂ O ₃ is 15 to 35 wt% from the viewpoint of suppressing yellowing. Is preferred. Further, the content of BaO is 10 to 2 for the reason of obtaining a high light transmittance.
It is preferably 0% by weight.

The average particle diameter, the maximum particle diameter of the glass powder, and the organic components contained in the dielectric paste may be the same as those in the above electrode paste. However, if possible, for example, dispersants, plasticizers, viscosity modifiers, oligomers, polymers,
It is desirable not to add additives such as an ultraviolet absorber, a photosensitive monomer, a photopolymerization initiator and a sensitizer.

The mixing ratio (weight ratio) of the powder glass, the solvent and the resin in the dielectric paste according to the present invention is as follows: powder glass: solvent: resin 60-70:
2 to 7:25 to 35 (total 100) is preferable. In particular, it is preferable that the powder glass: solvent: resin is 65: 5: 30. The electrode paste according to the present invention can be obtained by mixing and dispersing these components in the same manner as the above electrode paste.

Further, in order to form a dielectric layer in a PDP, the dielectric paste obtained as described above is applied by, for example, a screen printing method, a bar coater method, a roll coater method, a blade coater method or a die coater method. It may be applied and applied. The drying and firing conditions may be conventional.

(3) Plasma display panel (PD
Regarding P) The present invention also relates to a plasma display panel (PDP) having an electrode formed using the above electrode paste and a dielectric layer formed using the above dielectric paste.

That is, the present invention comprises a plurality of electrodes containing the first glass and Ag, and a dielectric layer containing the second glass and insulating between the electrodes. At least one of the glasses is 25 to 50% by weight Bi ₂ O ₃ , 5 to 35% by weight B ₂ O ₃ , 10 to 20% by weight ZnO, 5 to 20% by weight BaO, 0 to 15% by weight. A SiO ₂ and 0-10 wt% Al ₂ O ₃ are provided.

The second glass preferably contains 15 to 35% by weight of B ₂ O _3, and the second glass preferably further contains 0.1 to 2% by weight of CuO. . Although various structures can be considered as the structure of the PDP, the structure of the PDP according to the present invention is not particularly limited because it is characterized by using the electrode paste and the dielectric paste. For example, FIGS.
The structure shown in FIG.

As a method of forming the electrodes and the dielectric layer,
As described above, a conventionally known method may be used. As the glass substrate for forming the electrodes and the dielectric layer, for example, PP8 manufactured by Nippon Electric Glass Co., Ltd. may be used. Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

[0037]

Example << Experimental Example 1: Electrode paste >> Ethyl cellulose, which is a resin, and α-terpineol, which is a solvent,
The mixture was stirred at a weight mixing ratio of 4: 6 to prepare a solution containing an organic component. Then, this solution, Ag powder,
Glass powder having the composition shown in Table 1 (average particle diameter 1.5 μm
m, the maximum particle size is 4.5 μm), and the weight ratio is 30: 3: 67.
And mixed and dispersed with a three-roller to prepare an electrode paste.

[Evaluation] The electrode paste obtained as described above was applied onto a glass substrate (PP8 manufactured by Nippon Electric Glass Co., Ltd.) by a blade coater method in order to form a film-shaped electrode without pattern formation. After applying and holding at 90 ° C for 30 minutes to dry, 580
Baking was performed at 10 ° C. for 10 minutes. The thickness of the obtained electrode is 10
was μm. Cross-cut method (JIS K5600-
The adhesive strength of the electrode was evaluated using 5-6). In this evaluation, the case where the edge of the cut was smooth and there was no peeling in any of the grids was considered OK.

The electrode paste obtained as described above is
A glass substrate (PP8 manufactured by Nippon Electric Glass Co., Ltd.) was applied by a screen printing method, kept at 90 ° C. for 30 minutes, dried, and then baked at 590 ° C. for 10 minutes. The thickness of the obtained electrode was 10 μm. A color difference meter was used to measure the b value indicating the degree of coloring of the glass substrate. The degree of coloring of the glass substrate was evaluated by regarding the value obtained by subtracting the b value of Ag itself and the b value of the glass substrate itself from the obtained b value as the degree of yellowing. If the yellowing degree is 1.5 or less, almost no yellowing of the glass substrate is observed. Therefore, the yellowing degree of 1.5 or less was determined to be OK. The degree of yellowing referred to here was an evaluation regarding the Ag electrode. Further, as a comprehensive evaluation, there was no peeling and the yellowing degree was 1.
The case of 5 or less was regarded as OK and indicated as ◯. Otherwise x
Was written. The results are shown in Table 1.

[0040]

[Table 1]

As is clear from Table 1, the glass contained in the electrode contains 25 to 5 Bi ₂ O ₃ in terms of oxide.
0 wt%, the B ₂ O ₃ 5 to 35 wt%, the ZnO 10 to 2
0 wt%, BaO 5-20 wt%, SiO ₂ 0-1
By using glass having a composition containing 5% by weight and Al ₂ O _{3 in an amount} of 0 to 10% by weight, it is possible to form an electrode having high adhesive strength with a glass substrate and little yellowing of the panel.

Experimental Example 2: Electrode Paste An electrode paste was prepared in the same manner as in Experimental Example 1, except that glass powder having the composition, average particle diameter and maximum particle diameter shown in Table 2 was used.
Similarly, the adhesive strength and the degree of yellowing were evaluated. The results are shown in Table 2.

[0043]

[Table 2]

As is clear from Table 2, when the average particle size of the glass powder contained in the electrode paste is 4.0 μm or less and the maximum particle size is 10 μm or less, the adhesive strength between the formed electrode and the glass substrate is strong, The yellowing of PDP can be reduced.

Experimental Example 3: Dielectric Paste The resin ethyl cellulose and the solvent α-terpineol were mixed with stirring at a weight mixing ratio of 5:30 to prepare a solution containing an organic component. Then, this solution and glass powder having the composition shown in Tables 3 and 4 (average particle size: 2 μm)
m and maximum particle size 8 μm) were mixed at a weight ratio of 65:35, and mixed and dispersed by three rollers to prepare a dielectric paste.

[Evaluation] The dielectric paste obtained as described above was applied on a glass substrate having an electrode prepared by using the electrode paste according to the present invention by a blade coater method and kept at 90 ° C. for 30 minutes. After drying, it was baked at 580 ° C. for 10 minutes. The thickness of the obtained dielectric layer was 40 μm. A color difference meter was used to measure the b value indicating the degree of coloring of the glass substrate. The degree of coloring of the glass substrate was evaluated by regarding the value obtained by subtracting the b value of Ag itself and the b value of the glass substrate itself from the obtained b value as the degree of yellowing.
If the yellowing degree is 1.5 or less, yellowing of the glass substrate is hardly observed.
K. The degree of yellowing referred to here was evaluated for the dielectric layer formed on the Ag electrode.

The electrode paste obtained as described above is
Glass substrate without electrodes (P by Nippon Electric Glass Co., Ltd.)
P8) and apply it by the blade coater method at 90 ° C for 30
After holding for minutes and drying, baking was performed at 580 ° C. for 10 minutes. The thickness of the obtained electrode was 40 μm. The total light transmittance (wavelength = 550 nm) of the dielectric layer was measured. In order to achieve high brightness and high image quality with high-definition patterns such as in high-definition TV, VGA requires 85% or more, XG
It is considered that 90% or more is required for A (standard by Matsushita Electric Industrial Co., Ltd.). Therefore, 85% or more is OK here.

Further, as a comprehensive judgment, when the yellowing degree is 1.5 or less and the total light transmittance is 85% or more, it is regarded as OK and is represented by ◯. Other than that, it was written as x. Also, the degree of yellowing is 1.2
In the following, and when at least one of the total light transmittance of 90% or more is satisfied, a better performance is shown among ◯, and therefore it is indicated by ⊚. The results are shown in Tables 3 and 4
It was shown to.

[0049]

[Table 3]

[0050]

[Table 4]

As is clear from Tables 3 and 4, 25 to 50 wt% of Bi ₂ O ₃ and 25% by weight of B ₂ O ₃ are expressed as oxide in the glass of the dielectric layer using the glass substrate with electrodes. 5 to 35% by weight, ZnO 10 to 20% by weight, BaO 5 to 20% by weight, SiO _{2 0} to 15% by weight, and A
By using a glass having a composition containing 0 to 10% by weight of l ₂ O ₃ , a PDP with less yellowing can be obtained.

[0052] Further, as the glass of the dielectric layer, on an oxide basis representation, the Bi ₂ O ₃ 25 to 40 wt%, B ₂ O ₃ 1
By using a glass having a composition containing 5 to 35% by weight, ZnO 10 to 20% by weight, BaO 10 to 20% by weight, SiO ₂ 0 to 10% by weight, and Al ₂ O ₃ 0 to 10% by weight. A PDP with little yellowing and high permeability can be obtained.

CuO is added to the glass forming the dielectric layer.
By adding 0.1 to 2% by weight in terms of oxide, it is possible to obtain a PDP with less yellowing and high transmittance.

[0054]

According to the present invention, a paste that can be used for an electrode and a dielectric layer of a PDP and that can reduce the occurrence of yellowing, and a PDP with high brightness and high image quality using the paste are provided. be able to.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a front surface side of a plasma display panel.

FIG. 2 is a schematic cross-sectional view of the back surface side of the plasma display panel.

[Explanation of symbols]

1 Surface glass substrate 2 Rear glass substrate 3 display electrodes 4 transparent electrodes 5 address electrodes 6 phosphor 7 Surface derivative layer 8 Back surface derivative layer 9 partitions 10 MgO film

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4G062 AA09 BB01 BB05 BB08 DA01                       DA02 DA03 DA04 DB01 DB02                       DB03 DC03 DC04 DC05 DD01                       DE04 DF01 EA01 EB01 EC01                       ED01 EE01 EF01 FA03 FA04                       FB01 FC01 FD01 FE01 FF01                       FG01 FH01 FJ01 GA04 GA05                       GB01 GC01 GD01 GE01 GE03                       GE05 GE07 HH01 HH03 HH04                       HH05 HH07 HH09 HH11 HH13                       HH15 HH17 HH20 JJ01 JJ03                       JJ05 JJ07 JJ10 KK01 KK03                       KK05 KK07 KK10 MM12 MM23                       NN26 NN32 PP12 PP16                 5C040 FA01 FA04 GB03 GB14 GC18                       GD07 JA02 JA12 KA08 KA10                       KA14 KA17 KB09 KB13 KB28                       MA05 MA30

Claims (10)

[Claims] 1. Ag powder and 25 to 50% by weight of Bi ₂
O ₃ , 5-35 wt% B ₂ O ₃ , 10-20 wt% Z
nO, 5 to 20 wt% BaO, 0 to 15 wt% Si
An electrode material for a plasma display panel, comprising O ₂ and a glass powder containing 0 to 10% by weight of Al ₂ O ₃ . 2. The electrode material for a plasma display panel according to claim 1, wherein the glass powder has an average particle diameter of 4.0 μm or less and a maximum particle diameter of 10 μm or less. 3. An electrode paste for a plasma display panel, comprising the electrode material according to claim 1 and an organic component containing a resin and a solvent. 4. 25 to 50% by weight of Bi ₂ O ₃ , 5 to 35.
Wt% of B ₂ O _3, 10~20 wt% of ZnO, 5 to 20
Wt% BaO, 0-15 wt% SiO ₂ and 0
A dielectric material for a plasma display panel, comprising a glass powder containing 10% by weight of Al ₂ O ₃ . 5. The glass powder comprises 25-40 wt% Bi ₂ O ₃ , 15-35 wt% B ₂ O ₃ , 10-20 wt% ZnO, 10-20 wt% BaO, 0-. The dielectric material for plasma display according to claim 4, comprising 10 wt% SiO ₂ and 0 to 10 wt% Al ₂ O ₃ . 6. The glass powder according to claim 4, further comprising 0.1 to 2% by weight of CuO.
A dielectric material for a plasma display panel as described above. 7. A dielectric paste for a plasma display panel, comprising the dielectric material according to claim 4 and an organic component containing a resin and a solvent. 8. A plurality of electrodes containing a first glass and Ag, and a dielectric layer containing a second glass and insulating between the electrodes, at least the first glass and the second glass. One is 25 to 50% by weight of Bi ₂ O ₃ and 5 to 35% by weight of B
₂ O ₃ , 10-20 wt% ZnO, 5-20 wt% B
aO, 0-15 wt% SiO ₂ and 0-10 wt%
A plasma display panel comprising Al ₂ O ₃ . 9. The second glass comprises 15 to 35% by weight.
9. The plasma display panel according to claim 8, wherein the plasma display panel contains B ₂ O ₃ . 10. The second glass further comprises 0.1 to
The plasma display panel according to claim 7 or 8, comprising 2% by weight of CuO.