JP2001294444A - Material for plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material for a plasma display panel enhanced in transmittance while various characteristics to be required as a material for a barrier rib are satisfied. SOLUTION: This material for the plasma display panel consists of 20-80 wt.% powder of base glass and 20-80 wt.% powder of a glass filler. The base glass has the composition consisting of 50-75 wt.% PbO, 0.5-10 wt.% B2O3, 15-30 wt.% SiO2, 0-6 wt.% Ao2O3, 1-10 wt.% CaO+MgO+SrO+BaO and 0-6 wt.% SnO2+TiO2+ZrO2. The glass filler has the composition consisting of 50-75 wt.% PbO, 0.5-10 wt.% B2O3, 15-30 wt.% SiO2, 0.5-15 wt.% Ao2O3, 0-10 wt.% CaO+MgO+SrO+BaO and 0-6 wt.% SnO2+TiO2+ZrO2. The glass filler consists of the glass having the softening point higher than that of base glass.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material for a plasma display panel, and more particularly to a material suitable for forming a partition formed in a plasma display panel to partition discharge cells.

[0002]

2. Description of the Related Art A plasma display is a self-luminous type flat display, has excellent characteristics such as light weight and thinness, a wide viewing angle, and is easy to enlarge a screen. It is drawing attention as a device.

FIG. 1 is a sectional view showing the structure of such a plasma display panel. As shown in FIG.
In a plasma display panel, generally, a front glass substrate 1 and a rear glass substrate 2 are provided to face each other, and a space between these substrates is divided into a number of gas discharge parts. 7 are formed. A pair of transparent electrodes 3 are formed on the front glass substrate 1, and a voltage is applied between the transparent electrodes 3 to generate a plasma discharge. Usually, a metal electrode for reducing electric resistance is provided at an end of the transparent electrode 3, but this metal electrode is not shown in FIG.

[0004] A transparent dielectric layer 5 is formed on the transparent electrode 3 so as to cover the entire surface of the front glass substrate 1. On the transparent dielectric layer 5, a protective layer 6 made of MgO for stably forming plasma is formed.

An address electrode 4 is formed on the rear glass substrate 2 between the partitions 7. A phosphor 8 is applied between the partition walls 7 and on the side wall of the partition wall 7 and on the rear glass substrate 2 so as to cover the address electrodes 4.

[0006] A voltage is applied between the transparent electrodes 3, whereby a plasma discharge is generated in the gas discharge section partitioned by the partition 7, and the ultraviolet light generated by the plasma discharge is irradiated on the fluorescent material 8 to emit light. .

In the above-mentioned plasma display panel, the partition 7 is usually formed on the rear glass substrate 2. Then, the rear glass substrate 2 on which the partition walls 7 are formed and the front glass substrate 1 are combined so as to face each other to form a panel. In the panel structure shown in FIG. 1, the partition wall 7 is formed directly on the back glass substrate 2, but after forming the address electrode protecting dielectric layer covering the address electrodes 4 on the back glass substrate 2, A panel structure in which a partition is formed on the dielectric layer is also known.

As a method of forming the partition, a printing lamination method and a sand blast method are known. The printing lamination method is a method in which printing is repeated a plurality of times by screen printing at a position where a partition is to be formed, and the partition is formed by laminating by overlaying.

In the sand blast method, a paste is applied by screen printing or the like and then dried, or a green sheet is placed thereon, and a layer of a partition wall material is formed on a rear glass substrate so as to have a predetermined thickness, or for address protection. When a dielectric layer is formed, it is formed over the entire surface, a photosensitive resist is applied thereon, exposed and developed, and thereafter, a portion where the resist film is not formed is removed by sandblasting, and a predetermined portion is formed. This is a method of forming a partition. Partition forming materials conventionally used widely, for example, which has a glass powder of PbO-B ₂ O ₃ -SiO ₂ system, it is contained alumina, zircon, zirconia, titania, ceramic fillers, such as inorganic pigments, 500
It is designed so that it can be fired densely by firing at -600 ° C and the shape of the partition walls is maintained.

[0010]

In the case of plasma display panels, there is an eternal problem of improving the brightness. In particular, regarding the appearance of the fired partition walls, a white filler containing a white filler is used for the purpose of improving the brightness of the plasma display. The partition wall forming material having the appearance of baking has been mainly used.

However, since the discharge cells separated by the partition have a role as a display section, the inner surface thereof is coated with a phosphor to emit light, but the partition itself does not transmit light, so that the discharge cell is viewed from the entire display section. And the partition does not contribute to the improvement in luminance. Therefore, if the partition material itself has translucency,
Since the apparent aperture ratio is expected to be improved and the brightness is expected to be improved, a light-transmitting partition wall material is required.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to form a partition wall which satisfies various required characteristics required for a partition wall material, increases the transmittance of the partition wall material, and can easily obtain a high-luminance plasma display. It is an object of the present invention to provide a material for a plasma display panel suitable for the above.

[0013]

A material for a plasma display panel according to the present invention comprises 20 to 80% by weight of a base glass powder and 80 to 20% by weight of a glass filler powder.
The base glass powder is PbO 50-75 by weight percentage.
_{%, B 2 O 3 0.5~10%} , SiO 2 15~30%,
_{Al 2 O 3 0~6%, CaO} + MgO + SrO + BaO
It has a composition of 0-10% and SnO ₂ + TiO ₂ + ZrO ₂ 0-6%, and the glass filler powder is Pb by weight percentage.
_{O 50~75%, B 2 O 3} 0.5~10%, SiO 2
_{15~30%, Al 2 O 3 0.5~15} %, CaO + M
gO + SrO + BaO 0-10%, SnO ₂ + TiO ₂
+ ZrO ₂ 0-6%, and the glass filler powder is made of glass having a softening point higher than that of the base glass powder.

Here, the glass filler powder is preferably made of glass having a softening point higher by 30 to 200 ° C. than that of the base glass powder.
Preferably, the glass filler powder is made of glass having a softening point of 530 to 800 ° C. The glass filler powder is
The content of B ₂ O ₃ , SiO ₂ and Al ₂ O ₃ is expressed in terms of weight ratio,
It is preferable that the glass has a relationship of (Al ₂ O ₃ + B ₂ O ₃ ) / SiO ₂ <0.6.

Further, the material for a plasma display panel according to the present invention comprises 50 to 75% of PbO and B ₂ O by weight percentage.
_{3 0.5~10%, SiO 2 15~30%} , Al 2 O 3
0.1-13.2%, CaO + MgO + SrO + BaO
0-10%, and having a total 6% of the composition of SnO _2, TiO ₂ and ZrO _2.

The above-mentioned material of the present invention has a thickness of 3 after firing.
It is desirable that the diffuse transmittance value at 550 nm in terms of 0 μm is 50% or more in the transmittance value including the glass substrate.
Further, the material of the present invention is suitably used as a partition wall material in a plasma display panel.

[0017]

PDP material DETAILED DESCRIPTION OF THE INVENTION The present invention contemplates a PbO-B ₂ O ₃ -SiO ₂ based glass used in the partition wall material of the current plasma display panel to the base glass, translucent In order to achieve the purpose of obtaining a partition wall material having a, by newly developing a glass filler that is almost the same as the refractive index of the base glass, by defining the softening point of the base glass and the glass filler and the ratio thereof, It was conceived.

Specifically, PbO—B ₂ O ₃ —SiO ₂
Al ₂ O ₃ as a glass filler
% Or more and the softening point is increased without largely changing the refractive index. Therefore, the partition wall material using the material of the present invention can be densely fired while maintaining the shape of the partition wall by firing at 500 to 600 ° C., and has translucency because no ceramic filler is required.

In the present invention, the base glass powder contains 50 to 75% of PbO and 0.5 to 1 of B ₂ O ₃ by weight.
_{0%, SiO 2 15~30%,} Al 2 O 3 0~6%, C
aO + MgO + SrO + BaO 0-10%, Sn
O _2, made of a glass powder having a total 6% of the composition of TiO ₂ and ZrO _2. The glass filler powder is
In weight _{percent, PbO 50~75%, B 2 O} 3 0.5
_{~10%, SiO 2 15~30%,} Al 2 O 3 0.5~
15%, CaO + MgO + SrO + BaO 0-10
%, Composed of glass powder having a total 6% of the composition of SnO _2, TiO ₂ and ZrO _2. The base glass powder and the glass filler powder are each 20 to 80% by weight.
Are mixed at the ratio of

The reasons for limiting the glass composition ranges of the base glass powder and the glass filler powder as described above are as follows.

PbO is a component that lowers the softening point, and if its content is less than the above range, the softening point becomes high. For example, since the softening point exceeds 800 ° C., the sinterability at 600 ° C. becomes insufficient. . On the other hand, if the content exceeds the above range, the coefficient of thermal expansion becomes high, which is not preferable as a material for a plasma display panel.

B ₂ O ₃ is a component that widens the vitrification range. If the content is less than the above range, vitrification becomes difficult, and if it is more than the above range, alkali resistance is undesirably reduced.

SiO ₂ is a component that forms the skeleton of glass. If the content is less than the above range, the alkali resistance decreases, and if it is more than the above range, the softening point increases,
The sinterability at 600 ° C. when the ceramic powder is mixed may be insufficient.

Al ₂ O ₃ controls the phase separation property of the glass, and at the same time, has a softening point of 5 by introduction by substitution with B ₂ O _3.
It is a component having a function of arbitrarily changing the temperature within a range of 30 to 800 ° C. However, when the content is 0.5% by weight or less, the effect of increasing the softening point cannot be expected, and when used for glass filler powder, it becomes difficult to maintain the shape of the partition walls. On the other hand, Al
_{If the} content of ₂ O ₃ is more than the above range, the softening point becomes too high, so that the sinterability at 600 ° C. or less may be insufficient, and at the same time, it becomes difficult to maintain the refractive index, and the transmittance tends to decrease. .

When used as a partition material, B ₂ O
₃ , SiO ₂ , and Al ₂ O ₃ in weight ratio, (Al ₂ O ₃
It is important to adjust so as to satisfy the relationship of + B ₂ O ₃ ) / SiO ₂ <0.6. In other words, when this ratio is satisfied, it is easy to secure the shape retention when the partition wall material is fired.

CaO, MgO, SrO and BaO are components whose thermal expansion coefficient can be adjusted. When the content exceeds the above range, the thermal expansion coefficient tends to be too high.

SnO ₂ , TiO _2, and ZrO ₂ are all components that improve the alkali resistance of glass and have the effect of finely adjusting the refractive index. If the total content of these components exceeds the above range, the softening point increases, which is not preferable.

In the material for a plasma display panel of the present invention, the difference in glass softening point between the base glass powder and the glass filler powder is preferably in the range of 30 to 200 ° C. If the difference between the two softening points is smaller than the above range, there is a problem that it is difficult to ensure shape retention. If the difference is larger than the above range, the refractive index of the base glass powder and the glass filler powder will be different, so that the transmittance Tends to decrease. Further, it is preferable to use glass having a softening point of 500 to 600 ° C as the base glass powder, and it is preferable to use glass having a softening point of 530 to 800 ° C for the glass filler powder. When the softening point of the base glass powder is lower than the above range, the partition walls may be deformed at the time of firing at the time of sealing the exhaust pipe in a later step, and when higher than the above range, it is difficult to fire at 600 ° C or lower. Easy to be. When the softening point of the glass filler powder is lower than the above range, it is difficult to maintain the shape of the partition wall due to softening deformation, and when the softening point is higher than the above range, a difference from the refractive index of the base glass tends to be easily obtained.

Further, the material for a plasma display panel of the present invention has a refractive index of 1.7 to 1.9 by containing a high PbO component in the above composition range or adding SnO ₂ , TiO ₂ , and ZrO ₂ components. Can be adjusted.
In particular, when used as a partition wall material, the difference in the refractive index between the two types of glass powder is preferably 0.04 or less, and more preferably 0.04 or less, for the purpose of ensuring translucency when two types of glass powders are mixed. It is desirable that it is 02 or less.

Further, as long as the translucency is not impaired, a coloring component comprising an oxide such as Cu, Co, Ni, Fe or Mn is contained in at least one of the glass composition of the base glass and the glass filler. , A partition wall material exhibiting black or blue can be obtained. When recycling is performed as described later, the same amount of the coloring component may be contained in both the glass composition of the base glass and the glass filler.

The material for a plasma display panel according to the present invention has a total glass composition of P
_{bO50~75%, B 2 O 3 0.5~10} %, SiO 2
_{15~30%, Al 2 O 3 0.1~13.2} %, CaO
+ MgO + SrO + BaO 0 to 10%, SnO ₂ + Ti
O ₂ + ZrO ₂ has a composition of 0 to 6%. The material having this composition can be used as a partition wall material as described above,
It can also be used for other purposes, for example, as a dielectric material for forming a transparent dielectric layer or a dielectric layer for address protection, or as a blast material used for sandblasting partition walls.

When used as a dielectric material, 500
Among the compositions in the above composition range, it is preferable to select a glass having a softening point of 600 ° C. or less, so that the composition can be sufficiently softened and flowed by baking at a temperature of 600 ° C. to 600 ° C. In dielectric applications, since shape maintenance during firing does not need to be considered, it is not always necessary to use a mixture of two or more types of glass powder, and a single composition of glass powder may be used.

When used as a blast material, it is necessary to adjust the particle size so as to facilitate blasting. As will be described later, when recycling the partition wall material using the material of the present invention, it is important that the glass composition of the blast material to be used is substantially the same as the total glass composition of the partition wall material.

The material for a plasma display panel of the present invention comprises the above-mentioned base glass powder and glass filler powder as main components, but it is also possible to add various additives which are usually added. When used as a partition material, it is preferable not to use a ceramic filler as much as possible, but as long as the transparency is not impaired.
A ceramic filler may be included for the purpose of improving other properties such as shape retention. In this case, the larger the particle size of the ceramic filler, the more advantageous. Specifically, 50%
Alumina, cordierite having an average particle diameter of 1 μm or more,
It is preferable to use at least one type of ceramic filler selected from mullite, silica and the like. However, when the content of the ceramic filler is more than 25% by weight,
The sinterability is insufficient, making it difficult to form a dense partition, and also it is difficult to secure light transmission. As described later, when recycling is intended, use of a ceramic filler should be avoided.

The material for a plasma display panel of the present invention can be used in the form of, for example, a paste or a green sheet.

When used in the form of a paste, together with the above-mentioned glass powder and, if necessary, a ceramic filler,
Use thermoplastic resin, plasticizer, solvent, etc. The content of the glass powder and the ceramic filler in the paste is generally about 30 to 90% by weight.

The thermoplastic resin increases the film strength after drying,
Further, it is a component that imparts flexibility, and its content is 0.1%.
It is generally about 1 to 20% by weight. As the thermoplastic resin, polybutyl methacrylate, polyvinyl butyral, polymethyl methacrylate, polyethyl methacrylate, ethyl cellulose and the like can be used, and these can be used alone or in combination.

The plasticizer is a component that controls the drying speed and imparts flexibility to the dried film. The content of the plasticizer is generally about 0 to 10% by weight. As the plasticizer, butylbenzyl phthalate, dioctyl phthalate, diisooctyl phthalate, dicapryl phthalate, dibutyl phthalate, and the like can be used, and these can be used alone or in combination.

The solvent is a material for making the material into a paste, and its content is generally about 10 to 30% by weight. Examples of the solvent include terpineol, diethylene glycol monobutyl ether acetate, 2,2,4
-Trimethyl-1,3-pentadiol monoisobutyrate or the like can be used alone or in combination.

The paste can be prepared by preparing a glass powder and, if necessary, a ceramic powder, a thermoplastic resin, a plasticizer, a solvent and the like, and kneading them at a predetermined ratio to form a paste.

In order to form, for example, a partition using such a paste, first, these pastes are applied by a screen printing method, a batch coating method, or the like, and a coating layer having a predetermined thickness is formed. After drying, a resist film is formed, and exposed and developed. Subsequently, unnecessary portions are removed by using a sand blast method, and then baked to obtain a partition having a predetermined shape.

When the material for a plasma display panel of the present invention is used in the form of a green sheet, the material is used together with the glass powder and, if necessary, a ceramic filler.
Use a thermoplastic resin, a plasticizer, or the like.

The content of the glass powder and the ceramic filler in the green sheet is generally about 60 to 80% by weight.

As the thermoplastic resin and the plasticizer, the same thermoplastic resin and plasticizer as used in the preparation of the paste can be used. The mixing ratio of the thermoplastic resin is 5 to 30% by weight. %, And the mixing ratio of the plasticizer is generally about 0 to 10% by weight.

As a general method for producing a green sheet, the above-mentioned glass powder and, if necessary, a ceramic filler, a thermoplastic resin and a plasticizer are prepared, and a main solvent such as toluene, An auxiliary solvent such as alcohol is added to form a slurry, and the slurry is formed into a sheet on a film such as polyethylene terephthalate (PET) by a doctor blade method. After forming the sheet, the solvent and the solvent are removed by drying to obtain a green sheet.

The green sheet obtained as described above is thermocompression-bonded to a place where a glass layer is to be formed, and then fired to form a glass layer.
In the case of forming a partition, after forming a coating layer by thermocompression bonding, it is processed into a predetermined partition shape in the same manner as in the case of the paste described above.

In the above description, as a method of forming the partition walls, a sandblast method using a paste or a green sheet has been described as an example. However, the present invention is not limited to these methods, and a printing lamination method, a lift-off method, and the like. It is a material that can be applied to other forming methods such as a photosensitive paste method, a photosensitive green sheet method, and a press molding method.

When the partition is formed by the sand blast method, it is performed in the following manner. That is, a dry film resist is laminated on a dry film of a partition material having a film thickness of about 200 μm, and a portion where a partition is to be formed is masked. Next, the unmasked portion is cut and removed by spraying a blast material with a sand blast device. At this time, glass beads (window glass composition) coarser than the particle size of the partition wall material powder, or powder composed mainly of fused alumina, silicon carbide, chemical products, or the like are used as the blast material in order to enhance the machinability. The mixture of the blast material and the partition wall material generated by sand blasting is recovered in place and separated by the cyclone of the blasting device. The separated blast material is reused. On the other hand, a small amount of blast material is mixed into the partition wall material after separation. Since the desired properties cannot be obtained if the blast material mixed with the blast material is used as it is, it is necessary to separate the blast material, but in order to make this separation extremely difficult, the recovered partition material is used again in the product. That is, nothing is recycled.

Therefore, a blast material is manufactured using the material of the present invention, and the material for the blast is sandblasted, whereby the material can be recycled. In other words, by using a glass having substantially the same composition as the total glass composition of the partition material as the blast material, even if the blast material is mixed into the partition material to some extent, the total glass composition of the partition material is the same as that before sand blasting. Can be maintained as well.

In order to obtain a blast material having sufficient grindability, the blast material is adjusted so as to have a coarser particle size than the glass powder used for the partition wall material. The blast material can be used in any form of a powder state or a glass bead state by a usual pulverization and classification process.

In order to recycle the partition wall material using the blast material, the resin in the waste material may be removed in a binder removal step or the amount of the residual resin may be corrected. This makes it possible to return to the paste or sheet state again. Further, it may be melted and reshaped into a glass powder for a partition wall material before use. For smooth recycling, it is important to set the particle size condition to be separated by the cyclone so as to be compatible with the particle size of the partition wall material powder to be used. Thereby, even if recycling is repeated, the particle size of the partition wall material can be maintained.

[0052]

EXAMPLES Hereinafter, the material for a plasma display panel of the present invention will be described with reference to specific examples. However, the present invention is not limited by the following examples.

Preparation of glass powder Various oxides were prepared so that the glass compositions shown in Tables 1 and 2 were obtained.
After mixing and uniformly mixing glass raw materials such as carbonates, the mixture was put into a platinum crucible and melted at 1250 ° C. for 2 hours to obtain a uniform glass body. This was pulverized with an alumina ball mill and classified with a screen sieve having a mesh size of 53 μm.

The softening point of the obtained glass powder was measured. The softening point is measured by a macro-type differential thermal analyzer,
The value of the fourth inflection point was taken as the softening point.

Further, a block of glass was cut out, and a helium d-line (587.6 n
m) was measured.

[0056]

[Table 1]

[0057]

[Table 2]

As is clear from the results shown in the table, Sample A
Glass powders I to I had a softening point of 550 to 710 ° C and a refractive index of 1.781 to 1.806.

Evaluation of Partition Material Each glass powder A was prepared so as to have the compounding ratio shown in Tables 3 and 4.
~ I were mixed. In addition, the compounding ratios shown in Tables 3 and 4 indicate% by weight, and Table 4 shows a comparative example (sample No. 7) in which a mixture of the base glass and the ceramic filler was evaluated.

The mixture of the glass powder obtained as described above is kneaded with a terpineol solution of ethyl cellulose to form a paste, and the paste is applied on a window glass by a screen printing method to form a paste having a thickness of 200 μm. Layer 2
And one 50 μm layer was formed. The two sheets on which the 200 μm layer was formed were laminated with a dry film resist (DFR), and then, using the resist as a mask, a portion not covered with the resist was removed by sandblasting to form a partition wall. Was formed. next,
The formed partition is determined by the softening point of the base glass and its softening point +
It was baked at 20 ° C. for 10 minutes. The height of the partition wall fired at the softening point of the base glass is H ₁ , and the softening point of the base glass is +20.
The height of the partition fired at 0 ° C. was defined as H _2, and the rate of change was determined by the following formula to evaluate the shape retention as a partition material.

ΔH = H ₂ / H ₁ × 100 The height (H ₁ , H ₂ ) of the partition was determined from a photograph of the section of the partition observed by SEM.

The transmittance and film thickness of the substrate on which the remaining 50 μm layer was formed were measured, and the results are shown in Tables 2 and 3. The transmittance was 10% at the softening point of each base glass.
After baking for minutes, the diffusion transmittance at 550 nm was evaluated, and the film thickness of each sample was a value evaluated for the film thickness after baking. In addition, the transmittance | permeability uses the 1.7 mm-thick window glass substrate, and the measurement is calculated | required by the Shimadzu spectrophotometer UV-3100 including the glass substrate. The film thickness was measured with a micrometer.

[0063]

[Table 3]

[0064]

[Table 4]

As is clear from the results in Table 3, all of the glass mixtures of Examples 1 to 6 according to the present invention were able to secure good shape retention as partition walls. In addition, since the difference in the refractive index between the base glass and the glass filler was 0.02 or less, the transmittance showing the light transmission was as high as 67% or more. Therefore, it can be advantageously used as a partition wall material in a plasma display panel.

On the other hand, Comparative Example 7 contained a large amount of zirconia as a filler and had good shape retention, but had a low transmittance of 42%.

[0067]

As described above, the material for a plasma display panel of the present invention can be fired at a temperature of 600 ° C. or less, and has a high transmittance while ensuring the shape retention as a partition. is there. Therefore, the material for a plasma display panel of the present invention is suitable as a partition wall material useful when higher luminance is to be ensured.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a structure of a plasma display panel.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 front glass substrate 2 rear glass substrate 3 transparent electrode 4 address electrode 5 transparent dielectric layer 6 protective layer 7 partition wall (barrier rib) 8 phosphor

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuo Hatano 2-7-1 Hararashi, Otsu City, Shiga Prefecture Nippon Electric Glass Co., Ltd.

Claims (9)

[Claims] 1. The method of claim 1, wherein 20 to 80% by weight of the base glass powder and
80 to 20% by weight of lath filler powder
Las powder is PbO 50-75% by weight, B_Two 
O_Three 0.5-10%, SiO_Two 15-30%, Al_Two O
_Three 0-6%, CaO + MgO + SrO + BaO 0-1
0%, SnO_Two+ TiO_Two+ ZrO_Two Has a composition of 0-6%
And the glass filler powder is PbO 50
~ 75%, B_Two O_Three 0.5-10%, SiO_Two 15-3
0%, Al_Two O_Three 0.5-15%, CaO + MgO + S
rO + BaO 0-10%, SnO_Two+ TiO_Two+ ZrO
_Two It has a composition of 0 to 6% and the glass filler powder is
Glass having a softening point higher than that of base glass powder.
For plasma display panels
Fees. 2. The material for a plasma display panel according to claim 1, wherein the glass filler powder is made of glass having a softening point higher by 30 to 200 ° C. than that of the base glass powder. 3. The method according to claim 1, wherein the base glass powder is made of glass having a softening point of 500 to 600 ° C., and the glass filler powder is made of glass having a softening point of 530 to 800 ° C. For plasma display panels. 4. A glass filler powder comprising B ₂ O ₃ , Si
The content of O ₂ and Al ₂ O ₃ is expressed as a weight ratio, and (Al ₂ O ₃ + B ₂
O ₃₎ / SiO ₂ <PDP material according to claims 1 to 3, characterized in that it consists of glass is in the 0.6 relationship. 5. The film thickness after firing is 550 n in terms of 30 μm.
m is the transmittance value including the glass substrate, and is 50
% Or more. 6. The material for a plasma display panel according to claim 1, wherein the material according to claim 1 is a partition wall material in a plasma display panel. 7. PbO 50-75% by weight,
_{B 2 O 3 0.5~10%, SiO} 2 15~30%, Al
₂ O ₃ 0.1-13.2%, CaO + MgO + SrO +
BaO 0-10%, SnO ₂ , TiO ₂ and ZrO ₂
A material for a plasma display panel having a total composition of 0 to 6%. 8. A film thickness after firing is 550 n in terms of 30 μm.
m is the transmittance value including the glass substrate, and is 50
% Or more. 9. The material for a plasma display panel according to claim 7, wherein the material is a partition wall material in a plasma display panel.