KR100768424B1 - Pb-free barrier rib glass composition for plasma display panel - Google Patents

Abstract

A Pb-free barrier rib glass composition for a plasma display panel is provided to reduce environmental pollution and to obtain a high etching ratio, a low thermal expansion ratio, and a low heat characteristic by removing a lead oxide therefrom. A Pb-free barrier rib glass composition for a plasma display panel includes one or more kinds of oxides which are selected from a predetermined group. The predetermined group is formed of Li2O of 1 to 20 weight percent, B2O3 of 10 to 50 weight percent, P2O5 of 1-20 weight percent, ZnO of 10 to 50 weight percent, SrO of 0 to 30 weight percent, CaO of 0 to 10 weight percent, MgO of 0 to 10 weight percent, BaO of 0 to 10 weight percent, Al2O3 of 0 to 10 weight percent, and SiO2 of 0 to 10 weight percent.

Description

Lead-free bulkhead glass composition for plasma display panel {Pb-FREE BARRIER RIB GLASS COMPOSITION FOR PLASMA DISPLAY PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (PDP) substrate and a lead-free bulkhead glass composition for diversifying the partition wall formation method. More specifically, the present invention has a high etching rate, a low thermal expansion rate, and a low thermal characteristic. As a single layer than lead-free etching barrier material, it is advantageous to form high-definition barrier rib pattern in multi-faceted method, and it can be applied to various barrier rib formation methods. It is applied to soda lime substrate that replaces currently distributed substrate (Glass PD200). It is a glass frit for low temperature firing.

The plasma display panel is a display device using a plasma phenomenon, and discharge occurs when at least one potential difference is applied between two spatially separated contacts in a gas atmosphere in a non-vacuum state, which is called a gas discharge phenomenon.

A plasma display element is a flat panel display element which applied such gas discharge phenomenon to image display. A plasma display panel generally used at present is a reflective AC driving plasma display panel. In the case of a back substrate structure, a phosphor layer is formed in discharge cells partitioned by partition walls.

The plasma display panel, like other flat panel display devices such as a fluorescent display tube (VFD) or a field emission display (FED), is called a rear substrate and a front substrate (for convenience, first and second substrates at an arbitrary distance). ) Is formed to be substantially parallel to form an appearance thereof, wherein the substrates are joined by a bonding material disposed along a circumference therebetween to form a discharge cell in a vacuum state.

Sandblasting and etching methods are mainly used to form partition walls on the first substrate of the PDP, and photosensitive methods and mold methods are being developed for high definition of patterns and reduction of process costs. Low thermal properties, low thermal expansion, high etching rate, refractive index and organic material matchability are required as the requirements for the barrier rib forming method.

In addition, the substrate glass is currently used by Asahi (Japan) PD200 substrate and occupies the most cost among the glass used in the PDP, it is necessary to reduce the cost by replacing the substrate glass.

 However, the conventional substrate glass (PD200) has a high glass softening point, so that no deformation of the substrate occurs during the firing process several times during the PDP manufacturing process. However, in the case of the soda-lime substrate, the softening point at the glass transition point is similar to the current PDP firing process. It is necessary to develop a glass that satisfies the thermal characteristics.

The present invention is to solve the above problems, the object of the present invention is environmentally friendly, do not include lead oxide, can be applied to a number of bulkhead forming method and low thermal expansion rate, high etching rate, low temperature firing As a single layer, it is advantageous for the formation of high-definition bulkhead patterns and the production of multifaceted odors, and it is also possible to replace PDP substrate glass.

In order to achieve the above object, the present invention provides a lead-free bulkhead glass composition for a plasma display panel consisting of the following A) or B) and C).

That is, the first invention of the present invention is A) Li ₂ O 1-20% by weight, B ₂ O ₃ 10-50% by weight, P ₂ O ₅ 1-20 wt%, ZnO 10 to 50% by weight,

C) 0-30% by weight of SrO, 0-10% by weight of CaO, 0-10% by weight of MgO, 0-10% by weight of BaO, 0-10% by weight of Al ₂ O _{3 and} 0-10% by weight of SiO ₂ A lead-free bulkhead glass composition for a plasma display panel composed of at least one oxide selected from.

In addition, the second invention of the present invention is B) 10 to 50% by weight ZnO, 5 to 30% by weight SrO, 10 to 50% by weight B ₂ O ₃ , P ₂ O ₅ 1-20 wt%, 0-20 wt% of at least one oxide selected from the group consisting of Na ₂ O, Li ₂ O and K ₂ O,

C) 0 to 30% by weight of SrO, 0 to 10% by weight of CaO, 0 to 10% by weight of MgO, 0 to 10% by weight of BaO, 0 to 10% by weight of Al ₂ O _{3 and} 0 to 10% by weight of SiO ₂ It is a lead-free partition glass composition for plasma display panels consisting of at least one oxide.

In addition, a third invention of the present invention is A ') Li ₂ O, B ₂ O ₃ and P ₂ O ₅ , or B') ZnO, SrO and B ₂ O ₃ and C ') ZnO, P ₂ O ₅ , SiO ₂ , Bi ₂ O _{3 ,} V ₂ O _{5 ,} Na ₂ O, Li ₂ O, K ₂ O, CaO, MgO, BaO, MoO ₃ , Al ₂ O _{3 ,} As ₂ O ₃ , Sb ₂ O ₃ , CuO , Cr ₂ O ₃ , CoO, NiO and TiO ₂ , a lead-free bulkhead glass composition for a plasma display panel composed of at least one oxide selected from the group consisting of.

Further, the fourth invention of the present invention is A ″) Li ₂ O, B ₂ O ₃ , P ₂ O ₅ and ZnO, or B ″) ZnO, SrO, B ₂ O ₃ and P ₂ O ₅ and C ″). SiO ₂ , Bi ₂ O _{3 ,} V ₂ O _{5 ,} Na ₂ O, Li ₂ O, K ₂ O, CaO, MgO, SrO, MoO ₃ , Al ₂ O _3, As ₂ O ₃ , Sb ₂ O ₃ , CuO , Cr ₂ O ₃ , CoO, NiO and TiO ₂ , a lead-free bulkhead glass composition for a plasma display panel composed of at least one oxide selected from the group consisting of.

Hereinafter, the present invention will be described in more detail.

The lead-free glass composition for PDP barrier ribs of the present invention is a composition for forming a barrier rib partitioning a discharge cell of a second substrate, and does not include lead oxide, and includes Li ₂ O, B ₂ O ₃ , P ₂ O ₅ , and second. A lead-free glass composition composed mainly of ZnO, SrO, and B ₂ O ₃ .

The lead-free glass composition firstly comprises Li ₂ O, B ₂ O ₃ , P ₂ O ₅ , ZnO, P ₂ O ₅ , SiO ₂ , Bi ₂ O _{3 ,} V ₂ O _{5 ,} Na ₂ O, Li ₂ O , K ₂ O, CaO, MgO, SrO, MoO ₃ , Al ₂ O _{3 ,} As ₂ O ₃ , Sb ₂ O ₃ , CuO, Cr ₂ O ₃ , CoO, NiO and TiO ₂ It is preferable to further contain the above oxide.

In addition, the lead-free glass composition first comprises Li ₂ O, B ₂ O ₃ , P ₂ O ₅ and ZnO, SiO ₂ , Bi ₂ O _{3 ,} V ₂ O _{5 ,} Na ₂ O, Li ₂ O, K ₂ At least one oxide selected from the group consisting of O, CaO, MgO, SrO, MoO ₃ , Al ₂ O _{3 ,} As ₂ O ₃ , Sb ₂ O ₃ , CuO, Cr ₂ O ₃ , CoO, NiO and TiO ₂ It is more preferable to further include.

The lead-free glass composition includes second ZnO, SrO, B ₂ O ₃ , ZnO, P ₂ O ₅ , SiO ₂ , Bi ₂ O _3, V ₂ O _{5 ,} Na ₂ O, Li ₂ O, K ₂ O, It further comprises at least one oxide selected from the group consisting of CaO, MgO, SrO, MoO ₃ , Al ₂ O _{3 ,} As ₂ O ₃ , Sb ₂ O ₃ , CuO, Cr ₂ O ₃ , CoO, NiO and TiO ₂ It is desirable to.

In addition, the lead-free glass composition includes a second ZnO, SrO, B ₂ O ₃ and P ₂ O ₅ , ZnO, P ₂ O ₅ , SiO ₂ , Bi ₂ O _{3 ,} V ₂ O _{5 ,} Na ₂ O, Li ₂ O, K ₂ O, CaO, MgO, SrO, MoO ₃ , Al ₂ O _{3 ,} As ₂ O ₃ , Sb ₂ O ₃ , CuO, Cr ₂ O ₃ , CoO, NiO and TiO ₂ More preferably, it further contains at least one oxide.

In addition, the glass compositions are used as raw materials for melting the glass, and since metal ions and oxygen are present in an amorphous structure in the final glass frit, raw materials of metal carbides, nitrides and compounds in the same molar ratio as the metal oxides may be used.

Each of the components according to the content, the glass transition temperature (Tg), softening temperature (Ts), thermal expansion coefficient (TEC), etching rate, density, dielectric constant, gelation of the lead-free glass composition for PDP bulkhead of the present invention And color. Looking at the effect of each of the components on the lead-free glass composition as follows.

First Li ₂ O, B ₂ O ₃ , P ₂ O ₅ , ZnO, Al ₂ O ₃ , SiO2 based lead-free glass composition Li ₂ O is a yellowish glass formula, which controls the firing temperature by lowering the glass transition temperature (Tg) of the lead-free glass composition, increases the dielectric constant, increases the coefficient of thermal expansion (TEC) and the etching rate. . Therefore, when the sum of the oxides is less than 1% by weight relative to the total weight of the lead-free glass composition, the glass transition temperature may be increased and thus may not be fired. When the amount of the oxide is added more than 20% by weight, the glass transition temperature may be drastically lowered. May be generated and the coefficient of thermal expansion may be increased to hinder the morphological stability of the partition wall, so it is preferably included in an amount of 1 to 20% by weight, more preferably 5 to 15% by weight.

B ₂ O ₃ is a light-forming glass forming agent that increases the glass transition temperature (Tg) of the lead-free glass composition, lowers the coefficient of thermal expansion (TEC), stabilizes the glass, and increases the gelation frequency. Therefore, when the content of the B ₂ O ₃ is less than 10% by weight relative to the total weight of the lead-free glass composition, glass is not formed. When the content of the B ₂ O ₃ exceeds 50% by weight, the Tg is excessively increased and powder phase occurs. It is preferably included in 50 to 50% by weight, more preferably included in 20 to 30% by weight.

P ₂ O ₅ is a light-forming glass forming agent that has a slightly higher glass transition temperature (Tg) and etching rate of the lead-free glass composition, lowers the dielectric constant, slightly reduces the coefficient of thermal expansion (TEC) and gelation frequency. And excessive crystallization causes crystallization. Therefore, when the content of the P ₂ O ₅ exceeds 20% by weight based on the total weight of the lead-free glass composition, powder phase or crystallization may occur, so it is preferable to include 1 to 20% by weight, and 5 to 15% by weight. More preferably included.

ZnO, as a glass formula, lowers the glass transition temperature (Tg), dielectric constant, coefficient of thermal expansion (TEC) and gelation frequency of the lead-free glass composition, while functioning to improve the etching rate. Therefore, when the ZnO content is less than 10% by weight relative to the total weight of the lead-free glass composition, the effect of improving the etching rate is insignificant. When the content of the ZnO is more than 50% by weight, the etching rate is improved, but unmelted state occurs during melting. It may be included in 10 to 50% by weight, and more preferably included in 20 to 50% by weight.

Al ₂ O ₃ is a white glass stabilizer, which increases the glass transition temperature (Tg) of the lead-free glass composition, decreases the crystallinity of the glass, and lowers the coefficient of thermal expansion (TEC), etching rate, and gelation frequency. Therefore, when the content of Al ₂ O ₃ exceeds 10% by weight relative to the total weight of the lead-free glass composition, since the firing temperature may increase and the etching rate may decrease rapidly, the Al ₂ O ₃ content may be included in an amount of 0 to 10% by weight. More preferably included in an amount of 5% by weight.

SiO ₂ is a light-forming glass forming agent that increases the glass transition temperature (Tg) of the lead-free glass composition, dramatically lowers the coefficient of thermal expansion (TEC) and etching rate, and lowers the gelation frequency. Therefore, when the content of SiO ₂ exceeds 10% by weight based on the total weight of the lead-free glass composition, the Tg is excessively increased and the etching rate may be sharply lowered, so it is preferably included in an amount of 0 to 10% by weight. More preferably 0 to 5% by weight.

Further, in the second ZnO, SrO, B ₂ O ₃ , P ₂ O ₅ , Na ₂ O, Li ₂ O and K ₂ O at least one oxide glass composition selected from the group consisting of,

ZnO, as a glass formula, lowers the glass transition temperature (Tg), dielectric constant, coefficient of thermal expansion (TEC) and gelation frequency of the lead-free glass composition, while functioning to improve the etching rate. Therefore, when the ZnO content is less than 20% by weight with respect to the total weight of the lead-free glass composition, the effect of improving the etching rate is insignificant. When the content of the ZnO exceeds 50% by weight, the etching rate is improved, but the dielectric constant is lowered to function as a partition wall. There is a risk of loss and may be unmelted when melting, so it is preferably included in 20 to 50% by weight, more preferably contained in 30 to 40% by weight.

SrO has a dark color and functions to slightly increase the glass transition temperature and etching rate of the lead-free glass composition, and to increase the coefficient of thermal expansion and dielectric constant. The content of SrO is preferably included in 10 to 30% by weight or less, more preferably in 20 to 30% by weight based on the total weight of the lead-free glass composition.

B ₂ O ₃ is a light-forming glass forming agent that increases the glass transition temperature (Tg) of the lead-free glass composition, lowers the coefficient of thermal expansion (TEC), and increases the etching rate and gelation frequency. Therefore, when the content of the B ₂ O ₃ is less than 10% by weight relative to the total weight of the lead-free glass composition, the effect of improving the etching rate is insignificant, and when it exceeds 40% by weight, the Tg is excessively increased. It is preferably included in 40% by weight, more preferably included in 20 to 30% by weight.

P ₂ O ₅ is a light-forming glass forming agent that has a slightly higher glass transition temperature (Tg) and etching rate of the lead-free glass composition, lowers the dielectric constant, slightly reduces the coefficient of thermal expansion (TEC) and gelation frequency. Do it. Therefore, when the content of the P ₂ O ₅ exceeds 20% by weight relative to the total weight of the lead-free glass composition, the dielectric constant may be lowered, so it is preferable to include 0 to 20% by weight, and preferably 10 to 20% by weight. More preferably included

Na ₂ O, Li ₂ O, and K ₂ O are all yellow-colored glass formulas, which can control the firing temperature by increasing the glass transition temperature (Tg) of the lead-free glass composition, increase the dielectric constant, and improve the coefficient of thermal expansion (TEC). ) And increase the etching rate. Therefore, when any one selected from Na ₂ O, Li ₂ O, or K ₂ O, or the sum of two or more oxides exceeds 10 wt% based on the total weight of the lead-free glass composition, the glass transition temperature may be rapidly lowered. In addition, since the coefficient of thermal expansion may increase to inhibit the shape stability of the partition, it is preferably included in 5 to 10% by weight.

CuO, NiO, Cr ₂ O ₃ , As ₂ O ₃ , Sb ₂ O ₃ and CoO are used as additives in the glass and control the coordination number, stability and mobility in the lead-free glass composition. Therefore, the total content of the at least one component is preferably included in an amount of 0-1% by weight or less with respect to the total weight of the lead-free glass composition, and when it is 1% by weight or more, excessive coloring and glass stability may be reduced.

BaO is a dark colored glass formulating agent, which lowers the glass transition temperature (Tg) of the lead-free glass composition, and increases the etching rate, dielectric constant, coefficient of thermal expansion (TEC) and gelation frequency. Therefore, when the BaO content is less than 10% by weight based on the total weight of the lead-free glass composition, the effect of improving the etching rate is insignificant, and when the content of the BaO is more than 50% by weight, the coefficient of thermal expansion is increased to inhibit the shape stability of the PDP partition wall. Since it may be, it is preferably included in 10 to 50% by weight, more preferably included in 10 to 25% by weight.

Al ₂ O ₃ is a glass stabilizer that exhibits white color, and functions to increase the glass transition temperature (Tg) and dielectric constant of the lead-free glass composition, and to lower the coefficient of thermal expansion (TEC), etching rate, and gelation frequency. However, when the content of Al ₂ O ₃ exceeds 10% by weight based on the total weight of the lead-free glass composition, since the etching rate may be sharply reduced, it is more preferably included in an amount of 0 to 10% by weight.

In addition, the lead-free glass composition for PDP bulkhead of the present invention is a) Li ₂ O 5-15% by weight, B ₂ O ₃ 20-40% by weight, P ₂ O ₅ 5 to 15 wt% and b) i) ZnO At least one first oxide selected from the group consisting of 20-50% by weight, SiO ₂ 0-10% by weight, Al ₂ O ₃ 0-10% by weight, ii) Na ₂ O, Li ₂ O and K ₂ O 5-15% by weight of at least one second oxide selected from the group consisting of iii) at least one selected from the group consisting of As ₂ O ₃ , Sb ₂ O ₃ , CuO, Cr ₂ O ₃ , CoO and NiO At least one oxide selected from the group consisting of at least one third oxide selected from the group consisting of 0-10% by weight of oxides, 0-10% by weight of Al ₂ O ₃ , and 0-10% by weight of TiO ₂ . It is preferable to further include.

In addition, the lead-free glass composition for PDP bulkhead of the present invention is a) Li ₂ O 5-15% by weight, B ₂ O ₃ 20-40% by weight, P ₂ O ₅ 5-15 wt%, ZnO 20-50 wt%, b) i) at least one first oxide selected from the group consisting of 0-10 wt% SiO _2, 0-10 wt% Al ₂ O ₃ , ii) 5-15% by weight of at least one second oxide selected from the group consisting of Na ₂ O, Li ₂ O and K ₂ O, iii) As ₂ O ₃ , Sb ₂ O ₃ , CuO, Cr ₂ O ₃ At least one oxide selected from the group consisting of 0-10 wt%, Al ₂ O ₃ 0-10 wt% and TiO ₂ 0-10 wt%, at least one oxide selected from the group consisting of CoO and NiO More preferably, at least one oxide selected from the group consisting of oxides is further included.

In addition, the lead-free glass composition for PDP bulkhead of the present invention comprises a) 20 to 40% by weight of ZnO, 10 to 30% by weight of SrO, and 20 to 40% by weight of B ₂ O ₃ , b) i) P ₂ O ₅ 10-20 wt%, SiO ₂ 0-20 wt%, Bi ₂ O ₃ 0-20 wt% and V ₂ O ₅ At least one first oxide selected from the group consisting of 0-30% by weight, ii) 5-15% by weight of at least one oxide selected from the group consisting of Na ₂ O, Li ₂ O and K ₂ O, iii ) 0-10% by weight of at least one oxide selected from the group consisting of As ₂ O ₃ , Sb ₂ O ₃ , CuO, Cr ₂ O ₃ , CoO and NiO, 0-10% by weight of Al ₂ O ₃ and TiO ₂ It is preferable to further include at least one oxide selected from the group consisting of at least one third oxide selected from the group consisting of 0 to 10% by weight.

In addition, the lead-free glass composition for PDP bulkhead of the present invention includes a) 20 to 40% by weight of ZnO, 10 to 30% by weight of SrO, 20 to 40% by weight of B ₂ O ₃ , and 10 to 20% by weight of P ₂ O _5. B) i) 0-20 wt% SiO ₂ , 0-20 wt% Bi ₂ O ₃ and V ₂ O ₅ At least one first oxide selected from the group consisting of 0-30% by weight, ii) 5-15% by weight of at least one oxide selected from the group consisting of Na ₂ O, Li ₂ O and K ₂ O, iii ) 0-10% by weight of at least one oxide selected from the group consisting of As ₂ O ₃ , Sb ₂ O ₃ , CuO, Cr ₂ O ₃ , CoO and NiO, 0-10% by weight of Al ₂ O ₃ and TiO ₂ More preferably, at least one oxide selected from the group consisting of at least one third oxide selected from the group consisting of 0 to 10% by weight is further included.

Therefore, the most preferable examples of the lead-free glass composition for PDP partition walls of the present invention are Li ₂ O 5-15% by weight, B ₂ O ₃ 20-40% by weight, P ₂ O ₅ 5-15 wt%, ZnO 20-50% by weight, composition comprising 0-5% by weight of SiO ₂ and 0-5% by weight of Al ₂ O ₃ , or 20-40% by weight of ZnO, 10-30% by weight of SrO, 20-40% by weight of B ₂ O ₃ %, P ₂ O ₅ A composition comprising 10-20% by weight, 5-15% by weight of Li ₂ O and 0-1% by weight of CuO, or comprising As ₂ O ₃ , Sb ₂ O ₃ , CuO, Cr ₂ O ₃ , CoO and NiO It is preferable that 0-10 weight% of at least 1 sort (s) of oxide chosen from a group is contained.

Hereinafter, the details of the above object and technical configuration and the effects thereof according to the present invention will be understood by the detailed description through the embodiments of the present invention.

Example 1 (Low melting point glass composition for PDP bulkhead substrate diversification and various partition wall forming methods)

Using a ball mill or zero gravity mixer (equipment), the first case is Li ₂ O 10 kg, B ₂ O ₃ 35 kg, P ₂ O ₅ 10 kg, ZnO 40 kg, SiO ₂ 3 kg, Al ₂ O ₃ 3.5 kg, in the second case, ZnO 30 kg, SrO 20 kg, B ₂ O ₃ 30 kg and P ₂ O ₅ 15 kg, 10 kg Li ₂ O and 0.5 kg CuO were mixed and the mixture was melted in a furnace at a temperature of 1200-1350 ° C. The molten mixture was quenched by a method using twin rolls in a dry manner, coarsely pulverized with a disk mill, and finely pulverized with a dry mill to prepare a lead-free glass composition for PDP partition walls.

The glass softening temperature of the prepared lead-free glass composition is 480-505 ℃, the coefficient of thermal expansion is 70-85x10 ^-7 / ^o C, the average particle diameter is 3㎛. The glass softening temperature was measured using a thermal analyzer (TMA, SHIMADZU, TMA-50, Japan), the thermal expansion coefficient was measured using a thermal analyzer (TMA, TMA, SHIMADZU, TMA-50, Japan), the average particle diameter Was measured using a particle size analyzer (Mastersizer 2000, Malvern, UK).

  Example 2 (Chemical Properties, Organic Matter Matching, Microstructure of Lead-Free Glass Compositions for PDP Bulkheads)

70-80 parts by weight of the lead-free glass composition prepared according to Example 1, 1-5 parts by weight of prepared ethylcellulose, 1-5 parts by weight of butylcarbitol acetate (BCA) and 18-30 parts by weight of terpineol After adding three parts to the milling and derolling, degassing to prepare a lead-free glass composition paste, and coating the lead-free glass composition paste to a thickness of 300-400㎛ on a first substrate formed with an address electrode and a dielectric layer and dried. The dried lead-free glass composition paste was baked at a temperature of 540-560 ° C. to form a partition layer, and then a dry film resist was applied, exposed and developed to form a pattern. The partition layer on which the pattern of the dry film resist was formed was etched for 1 minute with a 1% by weight solution of nitric acid, and then washed to form a partition wall. The etching rate measured in the etching process was 10-20 μm / min, which showed about 25% increase in etching rate, low melting point, and low thermal expansion rate compared to the existing etching barrier ribs.

In addition, the lead-free glass composition prepared according to the embodiment ensures a dense microstructure without reaction with organic materials upon firing and has a refractive index of 1.6-1.8, and can be applied to photosensitive methods, sandblasting, and etching methods, and 70 × 10 ^-7. It is possible to apply a substrate change by having a coefficient of thermal expansion of 91 × 10 ⁻⁷ / ° C.

Therefore, the Pb-free barrier glass for PDP and thermal properties, etching characteristics, microstructures, and the like, which are currently used for the Pb-free glass composition obtained in the present invention, have a high firing temperature and a coefficient of thermal expansion. Although the etching rate is low, it may be detrimental to high-definition and multi-sided chamfer production of more than 6 chamfers, but the lead-free glass composition for PDP barrier ribs of the present invention exhibits low firing temperature, high etching rate, and low thermal expansion rate, thereby enabling the formation of high-definition barrier ribs for multi-facet use. Confirmed that it can.

As described above, the lead-free glass composition for PDP barrier ribs of the present invention is environmentally friendly because it does not contain lead oxide, which is harmful to the environment, and has a faster etching rate and lower thermal expansion rate than conventional glass compositions. Multi-sided odor production is possible, and the coefficient of thermal expansion is 70 × 10 ^-7 to 90 × 10 ^-7 / ℃ it is possible to change the substrate glass. In addition, it has the advantage of good lamination with organic materials and various partition wall formation methods such as photosensitive method, sand blasting and etching method with refractive index of 1.6-1.8.

Claims (13)

A) 1-20 wt% Li ₂ O, 10-50 wt% B ₂ O ₃ , P ₂ O ₅ 1-20 wt%, ZnO 10 to 50% by weight, C) 0-30% by weight of SrO, 0-10% by weight of CaO, 0-10% by weight of MgO, 0-10% by weight of BaO, 0-10% by weight of Al ₂ O _{3 and} 0-10% by weight of SiO ₂ A lead-free bulkhead glass composition for a plasma display panel, characterized in that it comprises at least one oxide selected from B) 10-50 wt% ZnO, 5-30 wt% SrO, 10-50 wt% B ₂ O ₃ , P ₂ O ₅ 1-20 wt%, 0-20 wt% of at least one oxide selected from the group consisting of Na ₂ O, Li ₂ O and K ₂ O, C) 0 to 30% by weight of SrO, 0 to 10% by weight of CaO, 0 to 10% by weight of MgO, 0 to 10% by weight of BaO, 0 to 10% by weight of Al ₂ O _{3 and} 0 to 10% by weight of SiO ₂ Lead-free bulkhead glass composition for plasma display panel, characterized in that consisting of at least one oxide The method of claim 1, The Li ₂ O is a lead-free bulkhead glass composition for a plasma display panel, characterized in that 5 to 15% by weight based on the total weight of the lead-free glass composition delete delete delete The method according to claim 1 or 2, The lead-free glass composition is a lead-free bulkhead glass composition for a plasma display panel, characterized in that the powder. delete delete delete delete Li ₂ O 5-15 wt%, B ₂ O ₃ 30-40 wt%, P ₂ O ₅ 5-15 wt%, ZnO A lead-free bulkhead glass composition for plasma display panel comprising 30 to 50% by weight, SiO ₂ 0 to 5% by weight, and Al ₂ O ₃ 0 to 5% by weight. ZnO 20-40 wt%, SrO 10-30 wt%, B ₂ O ₃ 20-40 wt%, P ₂ O ₅ A lead-free bulkhead glass composition for a plasma display panel, comprising 10 to 20 wt%, Li ₂ O 5 to 15 wt%, and CuO 0 to 1 wt%.