KR102216616B1 - Phosphor Glass Bead with Reduced Air Hole and Method for Manufacturing the Same - Google Patents

Abstract

Disclosed are a phosphor glass bead with reduced pores and a method for manufacturing the same. According to an aspect of the present embodiment, provided is the phosphor glass bead comprising phosphor particles, a glass frit, and a sintering aid for removing pores as the phosphor particles and the glass frit are mixed and sintered.

Description

Phosphor Glass Bead with Reduced Air Hole and Method for Manufacturing the Same}

The present invention relates to a phosphor glass bead with reduced pores and a method for manufacturing the same.

The content described in this section merely provides background information on the present embodiment and does not constitute the prior art.

In general, a glass bead containing a phosphor has a high refractive index, and due to this characteristic, it is used together with a dye to mark lanes and marking lines on the road, thereby enhancing the driver's ability to identify even in rainy weather or at night. Try to improve.

A conventional method of manufacturing a phosphor glass bead is as follows. Phosphor glass beads are produced by mixing a glass frit and a phosphor and sintering. At this time, due to the difference in specific gravity between the glass frit and the phosphor particles, there may be a problem that the two particles are not uniformly mixed, which causes the formation of pores.

1 is a diagram showing the structure of particles in a conventional phosphor glass bead.

Referring to FIG. 1, a conventional phosphor glass bead 100 is manufactured by mixing a glass frit 110 and a phosphor particle 120 and sintering. During the manufacturing process, due to the difference in specific gravity between the glass frit 110 and the phosphor particle 120, the glass frit 110 and the phosphor particle 120 are not uniformly mixed, and between the glass frit 110 and the phosphor particle 120 Pore 130 is generated. These pores 130 have a problem in that the durability of the manufactured phosphor glass beads 100 is weakened.

An object of the present invention is to provide a phosphor glass bead in which a glass frit and phosphor particles are uniformly mixed, and a method of manufacturing the same.

In addition, an object of the present invention is to provide a phosphor glass bead with enhanced durability and a method for manufacturing the same.

According to an aspect of the present invention, phosphor particles; Glass frit; And a sintering aid that removes pores as the phosphor particles and the glass frit are mixed and sintered to provide a phosphor glass bead.

According to an aspect of the present invention, the phosphor particles include a garnet-based phosphor or a photoluminescent phosphor.

According to an aspect of the present invention, the glass frit is characterized in that it contains at least one element selected from the group consisting of silicon oxide, boron oxide, aluminum oxide, transition metal oxide, alkali metal oxide and alkaline earth metal oxide.

According to an aspect of the present invention, the sintering aid is SiO ₂ , MgO, B ₂ O ₅ , CaO, APTES ((3-Aminopropyl) triethoxysilane), APTMS ((3-Aminopropyl) trimethoxysilane), TEOS (Tetraethyl Orthosilicate) It characterized in that it consists of at least one of.

According to an aspect of the present invention, a mixing process of mixing the glass frit, the phosphor particles, and the first sintering aid; And a sintering process of sintering in a predetermined first environment.

According to an aspect of the present invention, in the mixing process, the first sintering aid is attached around the glass frit and the phosphor particles.

According to an aspect of the present invention, the sintering process is characterized in that the pores are closed as the first sintering aid is neck growth.

According to an aspect of the present invention, the first sintering aid is characterized in that it is composed of at least one of SiO ₂ , MgO, B ₂ O ₅ , and CaO.

According to an aspect of the present invention, a mixing process of mixing a glass frit, a phosphor, and a second sintering aid; And a sintering process of sintering in a preset second environment.

According to an aspect of the present invention, the second sintering aid is characterized in that it is composed of at least one of APTES, APTMS, and TEOS.

According to an aspect of the present invention, the sintering process is characterized in that the pores are closed as the second sintering aid changes from a liquid state to a solid state.

As described above, according to an aspect of the present invention, as the glass frit and the phosphor particles are uniformly mixed, there is an advantage of providing a glass bead with enhanced durability by reducing pores.

1 is a diagram showing the structure of particles in a conventional phosphor glass bead.
2 is a diagram showing a structure of particles in a phosphor glass bead according to a first embodiment of the present invention.
3 is a flow chart showing a method of manufacturing a phosphor glass bead according to the first embodiment of the present invention.
4 is a diagram showing the structure of particles in a phosphor glass bead according to a second embodiment of the present invention.
5 is a flow chart showing a method of manufacturing a phosphor glass bead according to a second embodiment of the present invention.

In the present invention, various changes may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements.

Terms such as first, second, A, and B may be used to describe various elements, but the elements should not be limited by the terms. These terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

The terms used in the present application are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "include" or "have" should be understood as not precluding the possibility of existence or addition of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification. .

Unless otherwise defined, all terms, including technical or scientific terms, used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

In addition, each configuration, process, process, or method included in each embodiment of the present invention may be shared within a range not technically contradicting each other.

2 is a view showing the structure of particles in a phosphor glass bead according to the first embodiment of the present invention.

Referring to FIG. 2, the phosphor glass beads 200 are manufactured by mixing the glass frit 110, the phosphor particles 120, and the first sintering aid 210 and sintering them. As the glass frit 110, the phosphor particles 120, and the first sintering aid 210 are mixed, the first sintering aid 210 is dispersed and adhered around the glass frit 110 and the phosphor particles 120. And as the mixture is sintered, the first sintering aid 210 attached around the glass frit 110 and the phosphor particles 120 grows as a neck, and the space between the glass frit 110 and the phosphor particles 120 (Ie, pores) are closed. The spacing between particles in the phosphor glass beads 200 manufactured by this process is implemented very densely, thereby enhancing the durability of the phosphor glass beads 200.

The glass frit 110 is configured to include at least one element selected from the group consisting of silicon oxide, boron oxide, aluminum oxide, transition metal oxide, alkali metal oxide, and alkaline earth metal oxide. The glass frit 110 is manufactured by dry grinding of the glass flake, and at this time, the particle size of the glass frit 110 may be 50 to 100 μm. The glass frit 110 is configured to have a refractive index of 1.5 to 2.0. However, since the glass frit 110 has a refractive index lower than that of the phosphor particles 120, the light transmittance is not decreased due to surface reflection or the like.

The phosphor particles 120 may be implemented as a photoluminescent phosphor or a garnet-based phosphor.

Photoluminescent phosphors are materials that leave afterglow for a relatively long period of time even after the photostimulation is removed, and are manufactured by firing at high temperature as an activator and a study lubricant are added to the parent component. Phosphorescent phosphors are sulfide-based phosphorescent phosphors such as ZnS:Cu, CaS:Bi, (Ca,Sr)S:Bi, (Zn,Cd)S:Cu, etc., compounds represented by MAl ₂ O ₄ , activators and studies And oxide-based phosphors containing a lubricant. Here, M of the compound represented by MAl ₂ O ₄ may be composed of at least one of Ca, Sr, and Ba, or may be composed of a form in which Mg is added to at least one of Ca, Sr, and Ba.

Garnet-based phosphors are a compound in which the lattice position of YAG (Y ₃ Al ₃ O ₁₂ ), which is the name of yttrium aluminum garnet, and the yttrium (Y) of YAG, are replaced with other metal elements, especially rare earth, and the lattice position of aluminum (Al). Other metals, in particular, compounds substituted with gallium (Ga), ions that function as light-emitting centers based on YAG, such as Ce ³⁺ , Tb ³⁺ , Eu ³⁺ , Mn ²⁺ , Mn ⁴⁺ , Fe ³⁺ , Inorganic fluorescent material obtained by adding rare earth ions or transition metal ions represented by Cr ³⁺ , compounds in which yttrium (Y) is substituted with lutetium (Lu) (LuAG-based phosphor) and LuAG-based phosphor doped with Ce ³⁺ LuAG: Ce-based phosphors and the like are included.

The first sintering aid 210 may be implemented in a powder state, and may be composed of at least one component of SiO ₂ , MgO, Ba ₂ O ₅ , and CaO.

A method of manufacturing the phosphor glass bead 200 will be described in detail with reference to FIG. 3.

3 is a flow chart showing a method of manufacturing a phosphor glass bead according to the first embodiment of the present invention.

As shown in FIG. 3, the glass frit 110, the phosphor particles 120, and the first sintering aid 210 are mixed (S310). As the glass frit 110, the phosphor particles 120, and the first sintering aid 210 are mixed, the first sintering aid 210 is evenly dispersed and adhered around the glass frit 110 and the phosphor particles 120.

The mixture is sintered in a preset first environment (S320). As the mixture of the glass frit 110, the phosphor particles 120, and the first sintering aid 210 is sintered in a preset first environment, the first sintering aid 210 is neck growth, and the glass The pores formed between the frit 110 and the phosphor particles 120 are closed. As the pores are closed by the first sintering aid 210, the spherical phosphor glass beads 200 with enhanced durability are manufactured.

4 is a diagram showing the structure of particles in a phosphor glass bead according to a second embodiment of the present invention.

Referring to FIG. 4, the phosphor glass bead 400 is manufactured by mixing and sintering the glass frit 110, the phosphor particles 120, and the second sintering aid 410. As the glass frit 110, the phosphor particles 120, and the second sintering aid 410 are mixed, the second sintering aid 410 coats the glass frit 110 and the phosphor particles 120. And as the glass frit 110, the phosphor particles 120, and the second sintering aid 410 are sintered, the second sintering aid 410 is formed between the glass frit 110 and the phosphor particles 120 (ie , Qigong) is closed. As a result, a spherical phosphor glass bead 400 having an improved density between particles is manufactured.

Since the description of the glass frit 110 and the phosphor particles 120 has been described with reference to FIG. 2, detailed descriptions will be omitted.

The second sintering aid 410 is implemented in a liquid state when mixed, and may be made of a material that changes to a solid state as it is sintered. Accordingly, the second sintering aid 410 may be implemented with at least one of (3-Aminopropyl) triethoxysilane (APTES), (3-Aminopropyl) trimethoxysilane (APTMS), and Tetraethyl Orthosilicate (TEOS). A method of manufacturing the phosphor glass bead 400 will be described later with reference to FIG. 5.

5 is a flow chart showing a method of manufacturing a phosphor glass bead according to a second embodiment of the present invention.

As shown in FIG. 5, the glass frit 110, the phosphor particles 120, and the second sintering aid 410 are mixed (S510). As the glass frit 110, the phosphor particles 120, and the second sintering aid 410 are mixed, the second sintering aid 410 coats the glass frit 110 and the phosphor particles 120. Here, the second sintering aid 410 is implemented in a liquid state.

The mixture is sintered in a second preset environment (S520). As the mixture of the glass frit 110, the phosphor particles 120, and the second sintering aid 410 is sintered, the second sintering aid 410 is denatured into a solid state, and the glass frit 110 and the phosphor particles The pores formed between (120) disappear. By such a manufacturing method, a spherical phosphor glass bead 400 having an improved density between particles is manufactured.

In FIGS. 3 and 5, it is described that each process is sequentially executed, but this is merely illustrative of the technical idea of an embodiment of the present invention. In other words, if one of ordinary skill in the technical field to which an embodiment of the present invention belongs, one of each process or one of each process is performed by changing the order shown in FIGS. 3 and 5 without departing from the essential characteristics of an embodiment of the present invention. Since the above processes are executed in parallel, various modifications and variations may be applied, and thus FIGS. 3 and 5 are not limited to a time series order.

Meanwhile, the processes shown in FIGS. 3 and 5 can be implemented as computer-readable codes on a computer-readable recording medium. The computer-readable recording medium includes all types of recording devices that store data that can be read by a computer system. That is, the computer-readable recording medium is a magnetic storage medium (e.g., ROM, floppy disk, hard disk, etc.), optical reading medium (e.g., CD-ROM, DVD, etc.), and carrier wave (e.g., Internet And storage media such as transmission through In addition, the computer-readable recording medium can be distributed over a computer system connected through a network to store and execute computer-readable codes in a distributed manner.

The above description is merely illustrative of the technical idea of the present embodiment, and those of ordinary skill in the technical field to which the present embodiment belongs will be able to make various modifications and variations without departing from the essential characteristics of the present embodiment. Accordingly, the present exemplary embodiments are not intended to limit the technical idea of the present exemplary embodiment, but are illustrative, and the scope of the technical idea of the present exemplary embodiment is not limited by these exemplary embodiments. The scope of protection of this embodiment should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present embodiment.

100, 200, 400: phosphor glass beads
110: glass frit
120: phosphor particles
130: qigong
210: first sintering aid
410: second sintering aid

Claims (11)

delete delete delete delete A mixing process of mixing the glass frit, the phosphor particles, and the first sintering aid; And
A sintering process in which the first sintering aid is sintered in a preset first environment, and the first sintering aid closes the pores formed between the glass frit and the phosphor particles by neck growth
Phosphor glass beads manufacturing method comprising a. The method of claim 5,
The mixing process,
The phosphor glass bead manufacturing method, characterized in that the first sintering aid is attached to the periphery of the glass frit and the phosphor particles. delete The method of claim 5,
The first sintering aid,
SiO ₂ , MgO, B ₂ O ₅ , Phosphor glass bead manufacturing method, characterized in that consisting of at least one of CaO. delete delete delete

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