KR102253661B1 - Phosphorescent molded body and fabricating method of the same - Google Patents

Abstract

A manufacturing method of a photoluminescent molded body is provided. The manufacturing method of the photoluminescent molded body comprises the following steps of: pulverizing a glass frit having a melting point of less than 800°C; manufacturing a base source by mixing the pulverized glass frit and a photoluminescent pigment; providing the base source into a mold and pressing and forming the base source provided into the mold; and heat-treating the pressed and molded base source. Therefore, the photoluminescent molded body increases durability.

Description

Phosphorescent molded body and fabricating method of the same}

The present invention relates to a photoluminescent molded article and a method for manufacturing the same, and more particularly, to a photoluminescent molded article for manufacturing the molded article through a base source mixed with a phosphorescent pigment, and a method for manufacturing the same.

The change in consumption patterns according to the increase in income is indicated by an increase in the demand for emotional design of products. In addition, as human life and economic activities become diversified and active, demand for products that emit light for a long time at night and in dark places and exhibit color characteristics is increasing. Phosphorescent phosphors absorb light such as sunlight or electric lamps, and then emit light for tens of minutes in a dark place, and have the property of repetitively absorbing, emitting, absorbing, and emitting light any number of times.

Currently, sulfide-based phosphors, such as ZnS:Cu, Cas:Bi, (Ca,Sr)S:Bi, (Zn,Cd)S:Cu, etc., are mainly used as photoluminescent phosphors. However, the sulfide-based phosphor is very unstable to moisture or carbon dioxide gas in the atmosphere, so its durability is deteriorated, and its use is limited because it uses environmental regulation substances such as Cd. Accordingly, research on an oxide-based photoluminescent material that has excellent afterglow characteristics and is chemically and environmentally stable is being conducted.

SrAl ₂ O ₄ : Eu ²⁺ and Dy ³⁺ phosphors are known to have the best afterglow characteristics and chemical stability in the visible light region among the reported oxide-based photoluminescent materials. SrAl ₂ O ₄ : Eu ²⁺ and Dy ³⁺ phosphors have a stuffed tridymite structure, and are due to the 4f-5d transition ^{of Eu 2+} ions, an activator added to the _{SrAl 2} O _{4 matrix crystal.} Afterglow characteristics are explained by the trapping of holes by ^{Dy 3+} added as a coactivator. SrAl ₂ O ₄ : Eu ²⁺ and Dy ³⁺ Phosphors show yellow-green color when emitting light, and it is known that the photoluminescent properties are greatly affected by the conditions of synthesis and use.

One technical problem to be solved by the present invention is to provide a photoluminescent molded article having improved photoluminescence properties and a method of manufacturing the same.

Another technical problem to be solved by the present invention is to provide a photoluminescent molded article having improved durability and a method for manufacturing the same.

Another technical problem to be solved by the present invention is to provide a photoluminescent molded article having improved long afterglow characteristics and a method for manufacturing the same.

The technical problem to be solved by the present invention is not limited to the above.

In order to solve the above technical problems, the present invention provides a method of manufacturing a photoluminescent molded article.

According to an embodiment, the method of manufacturing the photoluminescent molded body includes pulverizing a glass frit, preparing a base source by mixing the pulverized glass frit and a phosphorescent pigment, and forming the base source into a mold. ) Provided in, and forming by pressing the base source provided in the mold, and heat-treating the press-molded base source.

According to an embodiment, as the concentration or particle size of the photoluminescent pigment included in the base source increases, the pressure applied to the base source in the pressing forming step of the base source may increase.

According to an embodiment, as the concentration or particle size of the phosphorescent pigment included in the base source increases, the heat treatment temperature of the press-molded base source may increase.

According to an embodiment, in the manufacturing step of the base source, the phosphorescent pigment may be provided in a concentration of 15 wt% to 45 wt%, and the melting point of the glass frit may be less than 800°C.

According to an embodiment, the base source may include the glass frit surrounding the phosphorescent pigment.

In order to solve the above technical problems, the present invention provides a photoluminescent molded article.

According to an embodiment, the photoluminescent molded body may include a glass frit having a melting point of less than 800°C, and a photoluminescent pigment having a concentration of 15 wt% to 45 wt%.

According to an embodiment, the glass frit may be disposed to surround the phosphorescent pigment.

According to an embodiment, the particle size of the graph frit may include a particle size smaller than that of the phosphorescent pigment.

According to an embodiment, the phosphorescent pigment may include _{adding europium (Eu) as an activator to the SrAl 2} O ₄ mother crystal, and adding dysprosium (Dy) as a study activator.

In order to solve the above technical problems, the present invention provides a photoluminescent tile.

According to an embodiment, the photoluminescent tile may include the photoluminescent molded body according to the above-described embodiment.

A method of manufacturing a photoluminescent molded body according to an embodiment of the present invention includes pulverizing a glass frit, preparing a base source by mixing the pulverized glass frit and a photoluminescent pigment, and molding the base source ( mold), pressing the base source provided in the mold, and heat-treating the pressure-molded base source. Accordingly, a phenomenon in which the glass frit penetrates into the photoluminescent pigment is prevented, so that a photoluminescent molded body having improved photoluminescence characteristics and durability can be manufactured.

1 is a flow chart illustrating a method of manufacturing a photoluminescent molded article according to an embodiment of the present invention.
2 is a view showing a base source used in a method of manufacturing a photoluminescent molded article according to an embodiment of the present invention.
3 is a view showing an application example of a photoluminescent molded article according to an embodiment of the present invention.
4 is a flowchart illustrating a method of manufacturing a photoluminescent molded article according to a first modified example of the present invention.
5 is a view showing a step of disposing first and second base sources in a mold in a method of manufacturing a photoluminescent molded article according to a first modified example of the present invention.
6 is a view showing a step of rearranging a glass frit and a phosphorescent pigment in a method of manufacturing a photoluminescent molded article according to a second modified example of the present invention.
7 and 8 are graphs and photographs showing characteristics of a glass frit used in manufacturing a photoluminescent molded article according to an exemplary embodiment of the present invention.
9 is a photograph of a photoluminescent pigment used in manufacturing a photoluminescent molded article according to an embodiment of the present invention.
10 and 11 are photographs of a photoluminescent molded article according to an embodiment of the present invention.
12 and 13 are photographs comparing photoluminescent molded articles according to Examples and Comparative Examples of the present invention.
14 is a graph comparing characteristics of photoluminescent molded articles according to Examples and Comparative Examples of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical idea of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed contents may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

In the present specification, when a component is referred to as being on another component, it means that it may be formed directly on the other component or that a third component may be interposed therebetween. In addition, in the drawings, thicknesses of films and regions are exaggerated for effective description of technical content.

In addition, in various embodiments of the present specification, terms such as first, second, and third are used to describe various elements, but these elements should not be limited by these terms. Accordingly, what is referred to as a first component in one embodiment may be referred to as a second component in another embodiment.

Each embodiment described and illustrated herein also includes its complementary embodiment. In addition, in the present specification,'and/or' has been used to mean including at least one of the elements listed before and after.

In the specification, expressions in the singular include plural expressions unless the context clearly indicates otherwise. In addition, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, components, or a combination thereof described in the specification, and one or more other features, numbers, steps, or configurations. It is not to be understood as excluding the possibility of the presence or addition of elements or combinations thereof.

In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a flowchart illustrating a method of manufacturing a photoluminescent molded body according to an embodiment of the present invention, and FIG. 2 is a view showing a base source used in a method of manufacturing a photoluminescent molded body according to an embodiment of the present invention, and FIG. 3 Is a diagram showing an application example of a photoluminescent molded article according to an embodiment of the present invention.

1 and 2, a method of manufacturing a photoluminescent molded article according to an embodiment of the present invention includes pulverizing a glass frit (S110), manufacturing a base source (S120), and pressing the base source. (S130), and heat-treating the press-molded base source (S140). Hereinafter, each step will be described in detail.

In the step S110, a glass frit may be crushed. According to an embodiment, the glass frit may have a lower melting point than that of a general glass frit. Specifically, the glass frit may have a melting point of less than 800°C. For example, the melting point of the glass frit may be 766°C. According to an embodiment, the glass frit may be crushed using a Beads mill. The average particle size of the pulverized graph frit may be 5 microns or less.

In the step S120, the pulverized graph frit GF and the photoluminescent pigment FP may be mixed. According to an embodiment, the phosphorescent pigment and the glass frit may be dry mixed using a V-mixer. Accordingly, the base source 100 may be manufactured. According to an embodiment, the phosphorescent pigment may include _{adding europium (Eu) as an activator to the SrAl 2} O ₄ mother crystal, and adding dysprosium (Dy) as a study activator. That is, the phosphorescent pigment may be SrAl ₂ O ₄ : Eu ²⁺ and Dy ³⁺ .

In contrast, according to another embodiment, the phosphorescent pigment is CaSrS, ZnCdS, ZnS or CaS activated with Cu or Bi, or (Sr _1-x M _x )Al2O4:R (x is 0.1 to 0.9, M is Is one or more metals selected from the group consisting of calcium, zinc, barium, calcium and magnesium, R is europium, lanthanum, selium, praseodymium, neodymium, samarium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and tellurium Or MAl ₂ O ₄ (M is one or more metals selected from the group consisting of calcium, strontium and barium, or magnesium is added to the one or more metals) as a mother crystal, the Euroform as an activator added to the mother crystal, or lanthanum, celium, praseodymium, neodymium, samarium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, tell as a study lubricant Lulium or lutetium may be added.

According to an embodiment, the particle size of the phosphorescent pigment FP may be larger than that of the glass frit GF. For example, the particle size of the photoluminescent pigment FP may be 30 to 45 microns. Accordingly, the base source 100 prepared by mixing the glass frit (GF) and the phosphorescent pigment (FP), as shown in FIG. 2, the glass frit (GF) is the phosphorescent pigment (FP) It can have a shape surrounding That is, as the particle size of the glass frit GF is smaller than the particle size of the phosphorescent pigment FP, the glass frit GF may effectively wrap the phosphorescent pigment FP.

According to an embodiment, the concentration of the phosphorescent pigment may be controlled to 15 wt% to 45 wt%. In this case, not only the durability of the photoluminescent molded body to be described later can be improved, but also the photoluminescent properties can be improved. On the contrary, when the concentration of the photoluminescent pigment is less than 15 wt%, there may be a problem in that the photoluminescent properties of the photoluminescent molded article to be described later are reduced. In addition, when the concentration of the phosphorescent pigment is more than 45 wt%, there may be a problem in that the durability of the phosphorescent molded article to be described later decreases.

In step S130, the base source may be provided in a mold, and the base source provided in the mold may be pressed to form the base source. For this reason, the shape of the base source may be transformed into the same shape as that of the mold. The shape of the mold is not limited. For example, the mold may be a tile mold.

According to an embodiment, as the concentration or particle size of the phosphorescent pigment included in the base source increases, the pressure applied to the base source may increase. That is, as the concentration of the phosphorescent pigment included in the base source increases, the pressure applied to the base source may increase. In addition, as the particle size of the phosphorescent pigment included in the base source increases, the pressure applied to the base source may increase. For example, when the concentration of the phosphorescent pigment is 20 wt%, the base source may be molded at a pressure of 10 ton. On the other hand, when the concentration of the phosphorescent pigment is 45 wt%, the base source may be molded at a pressure of 12 ton or more.

In the step S140, the pressure-molded base source may be heat treated. Accordingly, a photoluminescent molded article according to an embodiment of the present invention may be manufactured. More specifically, the pressure-molded base source may be heat-treated to a temperature of 600° C. at a temperature increase rate of 3° C., maintained at a temperature of 600° C. for 30 minutes, and then cooled.

According to an embodiment, as the concentration or particle size of the phosphorescent pigment included in the base source increases, the heat treatment temperature of the pressure-molded base source may increase. That is, as the concentration of the phosphorescent pigment included in the base source increases, the heat treatment temperature of the pressure-molded base source may increase. In addition, as the particle size of the phosphorescent pigment included in the base source increases, the heat treatment temperature of the pressure-molded base source may increase.

The photoluminescent molded body may be manufactured in various forms such as photoluminescent tiles, photoluminescent yarns, photoluminescent sheets, photoluminescent films, or photoluminescent tapes. In addition, the photoluminescent molded article may be used as a disaster prevention article for evacuation guidance indication in subways or buildings, as shown in FIG. 3. In addition, the photoluminescent molded article may be used in various fields such as night road traffic sign supplies and souvenirs. The field of use of the photoluminescent molded article is not limited.

In the case of a general glass frit, it has a relatively high melting point compared to the glass frit. Accordingly, when a photoluminescent molded body is manufactured using a general glass frit and a photoluminescent pigment, a heat treatment process at a relatively high temperature is required to melt the glass frit. However, when the heat treatment temperature applied to the glass frit is increased, a phenomenon in which the glass frit penetrates into the phosphorescent pigment may occur, resulting in a problem in that the phosphorescent characteristic is reduced.

In contrast, in the method of manufacturing a photoluminescent molded article according to an embodiment of the present invention, the step of pulverizing a glass frit having a melting point of less than 800°C, and the pulverized glass frit and a photoluminescent pigment are Mixing to prepare a base source, providing the base source in a mold, pressing and molding the base source provided in the mold, and heat-treating the pressure-molded base source. . Accordingly, a phenomenon in which the glass frit penetrates into the photoluminescent pigment is prevented, so that a photoluminescent molded body having improved photoluminescence characteristics and durability can be manufactured.

In the above, a photoluminescent molded article according to an embodiment of the present invention and a manufacturing method thereof have been described. Hereinafter, a photoluminescent molded article according to a modified example of the present invention and a method of manufacturing the same will be described.

Method for producing a photoluminescent molded article according to the first modified example

4 is a flowchart illustrating a method of manufacturing a photoluminescent molded body according to a first modified example of the present invention, and FIG. 5 is a first and second method in a mold of the method of manufacturing a photoluminescent molded body according to the first modified example of the present invention. It is a diagram showing the step of arranging a base source.

4 and 5, a method of manufacturing a photoluminescent molded article according to a first modified example of the present invention includes a first base source 100a and a second base source 100b having different concentrations of the photoluminescent molded article. Preparing (S210), after disposing the first base source (100a) in a mold, disposing the second base source (100b) on the first base source (100a) (S220), the first The first and second base sources 100a and 100b may be press-molded and heat treated (S230). Hereinafter, each step will be described in detail.

In step S210, a first base source 100a and a second base source 100b may be prepared. According to an embodiment, both the first base source 100a and the second base source 100b may be manufactured by mixing a glass frit and a phosphorescent pigment. That is, the first base source 100a and the second base source 100b are the base source 100 described in the method of manufacturing the photoluminescent molded body according to the embodiment described with reference to FIGS. 1 and 2. ) Can be the same as the manufacturing method. Accordingly, detailed descriptions are omitted.

According to an embodiment, the first base source 100a and the second base source 100b may have different concentrations of the phosphorescent pigment. For example, the concentration of the phosphorescent pigment included in the first base source 100a may be higher than the concentration of the phosphorescent pigment included in the second base source 100b. In addition, the first base source 100a and the second base source 100b may have different concentrations of the graph frit. For example, the concentration of the glass frit included in the second base source 100b may be higher than the concentration of the glass frit included in the first base source 100a.

In step S220, the first base source 100a and the second base source 100b may be disposed in a mold. According to an embodiment, after the first base source 100a is provided in the mold, the second base source 100b may be provided. Accordingly, as shown in FIG. 5, the first base source 100a is disposed in _{the lower region M 1 of} the mold, and the second base source 100b _{is disposed in the upper region M 2 of the mold.} ) Can be placed. As a result, in the lower region M ₁ of the mold, the concentration of the phosphorescent pigment may be relatively high and the concentration of the glass frit may be relatively low. On the other hand, in the upper region M ₂ of the mold, the concentration of the phosphorescent pigment may be relatively low and the concentration of the glass frit may be relatively high.

In the step S230, after the first and second base sources 100a and 100b are press-molded, heat treatment may be performed. Accordingly, the photoluminescent molded article according to the first modified example may be manufactured.

According to an embodiment, concentrations of the photoluminescent pigment may be different between the first region and the second region of the photoluminescent molded body according to the first modified example. In addition, the first region and the second region of the photoluminescent molded body according to the first modified example may have different glass frit concentrations. For example, the first region may be a lower region of the photoluminescent molded body, and the second region may be an upper region of the photoluminescent molded body. Alternatively, the first region may be one side of the photoluminescent molded body, and the second region may be the other side of the photoluminescent molded body.

That is, in the first region of the photoluminescent molded body according to the first modified example, the concentration of the photoluminescent pigment may be relatively high and the concentration of the glass frit may be relatively low. On the other hand, in the second region of the photoluminescent molded body according to the first modified example, the concentration of the photoluminescent pigment may be relatively high and the concentration of the glass frit may be relatively low.

Accordingly, when the photoluminescent molded body according to the first modified example is manufactured as a photoluminescent tile, not only the construction efficiency of the photoluminescent tile is improved, but also the visibility of the photoluminescent tile may be improved. More specifically, in the case of the photoluminescent tile, it is constructed so that one side is in contact with the wall or floor surface, and the other side is exposed to the outside. In this case, the construction efficiency can be improved by relatively increasing the concentration of the glass frit in the area in contact with the wall or floor surface, and the visibility can be improved by relatively increasing the concentration of the phosphorescent pigment in the area exposed to the outside. As a result, in the case where the photoluminescent molded body according to the first modified example is made of a photoluminescent tile by having different concentrations of the photoluminescent pigment and glass frit disposed in different regions, the photoluminescent molded body according to the first modified example is made of a photoluminescent tile. It is possible to improve the construction efficiency and visibility of the photoluminescent tile.

Method for producing a photoluminescent molded article according to the second modified example

6 is a view showing a step of rearranging a glass frit and a phosphorescent pigment in a method of manufacturing a photoluminescent molded article according to a second modified example of the present invention.

A method of manufacturing a photoluminescent molded article according to a second modified example of the present invention includes the steps of pulverizing a glass frit, preparing a base source, pressing the base source, and heat-treating the pressure-molded base source. Can include. That is, the method of manufacturing the photoluminescent molded article according to the second modified example may be the same as the method of manufacturing the photoluminescent molded article according to the embodiment described with reference to FIGS. 1 and 2. However, according to the method of manufacturing the photoluminescent molded body according to the second modified example, the step of pressing the base source may further include rearranging the glass frit and the photoluminescent pigment. Accordingly, detailed descriptions of the steps except for the step of pressing the base source are omitted.

The step of pressing the base source included in the manufacturing method of the photoluminescent molded article according to the second modified example includes: providing the base source in a mold, a glass frit and a photoluminescent pigment included in the base source provided in the mold It may include the step of rearranging and pressing the base source.

According to an embodiment, in a state in which the base source is provided in the mold, vibration may be applied to the base source by shaking the mold. In this case, as shown in FIG. 6, the glass frit GF having a relatively small size is _{moved to the first region M 1} in the mold, and the phosphorescent pigment FP having a relatively large size is It may be moved to the second area M _{2 in the mold.} A first area M ₁ in the mold may be a lower area of the mold, and a second area M _{2 in} the bold may be an upper area of the mold. That is, when vibration is applied to the base source, the glass frit GF having a relatively small size is moved to the lower region of the mold, and the phosphorescent pigment FP having a relatively large size is moved to the upper region of the mold Can be moved to.

Accordingly, the concentration of the glass frit GF may be relatively higher in the first region M _{1 in} the mold compared to the second region M _2. On the other hand, the second region M _{2 in} the mold may have a relatively higher concentration of the photoluminescent pigment FP compared to the first region M _1.

Thereafter, in a state in which the glass frit GF and the photoluminescent pigment FP are rearranged, the base source may be press-molded and heat treated. Accordingly, the photoluminescent molded article according to the second modified example may be manufactured.

As a result, the photoluminescent molded article according to the second modified example may have a relatively high concentration of a glass frit on one side and a relatively high concentration of a photoluminescent pigment on the other side. Accordingly, when the photoluminescent molded body according to the second modified example is manufactured as a photoluminescent tile, not only the construction efficiency of the photoluminescent tile is improved, but also the visibility of the photoluminescent tile may be improved.

Method for producing a photoluminescent molded article according to the third modified example

A method of manufacturing a photoluminescent molded article according to a third modified example of the present invention includes the steps of pulverizing a glass frit, preparing a base source, pressing the base source, and heat-treating the pressure-molded base source. Can include. That is, the method of manufacturing the photoluminescent molded article according to the third modified example may be the same as the method of manufacturing the photoluminescent molded article according to the embodiment described with reference to FIGS. 1 and 2. However, according to the method of manufacturing the photoluminescent molded body according to the third modified example, the step of pressing the base source may further include rearranging the glass frit and the photoluminescent pigment. Accordingly, detailed descriptions of the steps except for the step of pressing the base source are omitted.

The step of pressing the base source included in the manufacturing method of the photoluminescent molded article according to the third modified example includes: providing the base source in a mold, a glass frit and a photoluminescent pigment included in the base source provided in the mold It may include the step of rearranging and pressing the base source.

According to an embodiment, vibration may be applied to the base source using an ultrasonic vibrator. More specifically, after disposing an ultrasonic vibrator on the base source, vibration may be applied to the base source by operating the ultrasonic transducer.

In this case, as shown in FIG. 6, the glass frit GF having a relatively small size is _{moved to the first region M 1} in the mold, and the phosphorescent pigment FP having a relatively large size is It may be moved to the second area M _{2 in the mold.} A first area M ₁ in the mold may be a lower area of the mold, and a second area M _{2 in} the bold may be an upper area of the mold. That is, when vibration is applied to the base source, the glass frit GF having a relatively small size is moved to the lower region of the mold, and the phosphorescent pigment FP having a relatively large size is moved to the upper region of the mold Can be moved to.

Accordingly, the concentration of the glass frit GF may be relatively higher in the first region M _{1 in} the mold compared to the second region M _2. On the other hand, the second region M _{2 in} the mold may have a relatively higher concentration of the photoluminescent pigment FP compared to the first region M _1.

Thereafter, in a state in which the glass frit GF and the photoluminescent pigment FP are rearranged, the base source may be press-molded and heat treated. Accordingly, the photoluminescent molded article according to the third modified example may be manufactured.

As a result, the phosphorescent molded article according to the third modified example may have a relatively high concentration of a glass frit on one side and a relatively high concentration of a phosphorescent pigment on the other side. Accordingly, when the photoluminescent molded body according to the third modified example is manufactured as a photoluminescent tile, not only the construction efficiency of the photoluminescent tile is improved, but also the visibility of the photoluminescent tile may be improved.

Method for producing a photoluminescent molded article according to the fourth modified example

The manufacturing method of the photoluminescent molded article according to the fourth modified example of the present invention includes the steps of pulverizing a glass frit, preparing a base source, pressing the base source, and heat-treating the pressure-molded base source. Can include. That is, the method of manufacturing the photoluminescent molded article according to the fourth modified example may be the same as the method of manufacturing the photoluminescent molded article according to the embodiment described with reference to FIGS. 1 and 2. Accordingly, detailed descriptions are omitted.

However, in the manufacturing method of the photoluminescent molded article according to the fourth modified example, an atmospheric gas is provided to the pressure-molded base source and may be heat treated. For example, the atmospheric gas may be a gas containing nitrogen. Specifically, the atmospheric gas may be ammonia (NH ₃ ) gas. In this case, the atmospheric gas may penetrate into the surface of the photoluminescent molded body. Accordingly, the photoluminescent molded article according to the fourth modified example may have improved long afterglow characteristics. That is, in the photoluminescent molded article according to the fourth modified example, the time to emit light may last relatively long.

More specifically, in the case of a photoluminescent pigment, electrons of the compound constituting the photoluminescent pigment are excited to a higher energy level by the stimulation of light, and when the energy supply from the light source is stopped afterwards, the electrons in the excited state are stable. As it recovers to its state, it releases the difference in energy. This energy appears as visible light, and the photoluminescent material emits light as much as the difference in energy level recovering from an excited state to a stable state. However, as described above, the atmospheric gas penetrates into the surface of the photoluminescent molded body. In this case, an energy state may be formed between the excited state and the stable state. Accordingly, the time for the electrons in the excited state to recover to the stable state is increased, so that the time for the photoluminescent molded body to emit light may be improved.

In the above, a photoluminescent molded article and a manufacturing method thereof according to a modified example of the present invention have been described. Hereinafter, specific experimental examples and characteristic evaluation results of a photoluminescent molded article and a method of manufacturing the same according to an embodiment of the present invention will be described.

Preparation of photoluminescent molded article according to Example 1

After grinding a glass frit having a melting point of 766℃ to a size of 5 microns or less using a Beads mill, the concentration of 15 wt% ~ 45 wt% and the size of 30 ~ 45 microns are adjusted. A base sauce was prepared by mixing through a phosphorescent pigment and a V-mixer. Thereafter, the base source was put into a metal mold with a diameter of 1 inch, pressurized under a load of 5 ton or more, heat-treated at 600°C (heating rate 3°C per minute) for 30 minutes using an electric furnace, and then cooled by furnace, Was prepared.

Preparation of photoluminescent molded article according to Example 2

Glass frit with a melting point of 1090℃ is pulverized to a size of 1 microns or less using a ball mill, and then solid content (glass frit + phosphorescent pigment (particle size 30~45 microns) using a mixer) )) was wet-mixed with water at a ratio of 1:1 for 10 minutes to prepare a base sauce. More specifically, as for the solid content, a glass frit and a phosphorescent pigment were mixed in a ratio of 65 wt%: 35 wt%.

Thereafter, the base source was applied to the ceramic tile that was first heat-treated at 1200°C, and then completely dried in an oven at 110°C to perform heat treatment, and maintained at 720°C (heating rate 3°C per minute) using an electric furnace for 30 minutes. After heat treatment, it was cooled by furnace to prepare a photoluminescent molded article according to Example 2.

Preparation of photoluminescent molded article according to Comparative Example 1

A photoluminescent pigment having a size of 150 microns was used, but prepared by the method of manufacturing the photoluminescent molded body according to the above embodiment.

Preparation of photoluminescent molded article according to Comparative Example 2

Codomo energy's photoluminescent product has been prepared.

7 and 8 are graphs and photographs showing characteristics of a glass frit used in manufacturing a photoluminescent molded article according to an exemplary embodiment of the present invention.

7 and 8, after preparing a glass frit used for manufacturing a photoluminescent molded article according to an embodiment of the present invention, heat treatment is performed at a temperature increase rate of 10°C/min to 1000°C, and the state according to the heat treatment temperature. It was shown by measuring the change of.

As can be seen in FIGS. 7 and 8, in the case of the glass frit, sintering occurs at a temperature of 519°C, softening occurs at a temperature of 520°C, spheres are generated at a temperature of 634°C, and a temperature of 673°C. It was confirmed that a half sphere was generated and melting occurred at 766°C. That is, it can be seen that the glass frit used for manufacturing the photoluminescent molded article according to the embodiment of the present invention has a low melting point of less than 800°C.

9 is a photograph of a photoluminescent pigment used in manufacturing a photoluminescent molded article according to an embodiment of the present invention.

Referring to FIG. 9, after preparing a photoluminescent pigment used for manufacturing a photoluminescent molded article according to an embodiment of the present invention, various particles (1 to 5) of the photoluminescent pigment were photographed, and the size of each was measured. The sizes of the particles photographed in FIG. 9 are summarized through <Table 1> below.

division Particle size (μm) One 40.672 2 33.596 3 33.760 4 32.678 5 43.400 Average 36.821 Standard Deviation 4.874

As can be seen from FIG. 9 and <Table 1>, it was confirmed that the particles of the photoluminescent pigment used in the manufacture of the photoluminescent molded body according to the embodiment had an average size of 36.821 μm.

10 and 11 are photographs of a photoluminescent molded article according to an embodiment of the present invention.

Referring to FIGS. 10 and 11, after preparing the photoluminescent molded body according to the embodiment of the present invention, a state before the photoluminescent molded body emits light by application of light, and a state in which the application of light is stopped so that the photoluminescent molded body emit light. Photographed and shown in Figs. 10 and 11, respectively. As can be seen in FIGS. 10 and 11, it was confirmed that the photoluminescent molded article according to the embodiment of the present invention exhibits excellent photoluminescence properties.

12 and 13 are photographs comparing photoluminescent molded articles according to Examples and Comparative Examples of the present invention.

12 and 13, after photographing a photoluminescent molded article according to an embodiment and a comparative example of the present invention, it is shown in FIGS. 12 and 13, respectively. As can be seen in FIGS. 12 and 13, it was confirmed that sintering was further performed in the specimen with the smaller size of the photoluminescent pigment, resulting in a bloating phenomenon. That is, when the size of the phosphorescent pigment is increased, it can be seen that the heat treatment temperature of the press-molded base source must be increased.

14 is a graph comparing characteristics of photoluminescent molded articles according to Examples and Comparative Examples of the present invention.

Referring to FIG. 14, after preparing the photoluminescent molded articles according to Examples 1, 2, and 2 of the present invention, the intensity (Intensity) according to time (Time, sec) was measured and shown for each. As can be seen in FIG. 14, in the case of the photoluminescent molded article according to Example 1 of the present invention, it was confirmed that the difference in strength appeared the least despite the passage of time.

As described above, the present invention has been described in detail using preferred embodiments, but the scope of the present invention is not limited to specific embodiments, and should be interpreted by the appended claims. In addition, those who have acquired ordinary knowledge in this technical field should understand that many modifications and variations are possible without departing from the scope of the present invention.

Claims (10)

Grinding glass frit;
Preparing a base source by mixing the pulverized glass frit and a phosphorescent pigment;
Providing the base source in a mold, and forming the base source by pressing the base source provided in the mold; And
Including the step of heat-treating the pressure-molded base source,
In the manufacturing step of the base source, the phosphorescent pigment is provided at a concentration of 15 wt% to 45 wt%, and the melting point of the glass frit is less than 800°C.
The method of claim 1,
The step of preparing the base source,
Preparing a first base source having a relatively high concentration of the phosphorescent pigment and a second base source having a relatively low concentration of the phosphorescent pigment,
The step of forming by pressing the base source,
Disposing the first base source in a lower area of the mold;
Disposing the second base source on the first base source; And
And molding the first base source and the second base source by pressing the first base source and the second base source while the second base source is disposed on the first base source.
The method of claim 1,
The step of forming by pressing the base source,
Providing the base source in a mold;
Applying vibration to the base source disposed in the mold to move the glass frit having a relatively small size to a lower area in the mold, and moving the phosphorescent pigment having a relatively large size to an upper area in the mold ; And
And forming a photoluminescent molded body by pressing the base source while the glass frit is moved to a lower region of the mold and the photoluminescent pigment is moved to an upper region of the mold.
The method of claim 1,
The step of heat-treating the pressure-molded base source,
_{A method of manufacturing a photoluminescent molded body comprising the step of providing an atmospheric gas containing ammonia (NH 3} ) to the pressure-molded base source and heat-treating to penetrate the atmospheric gas into the surface of the photoluminescent molded body.
The method of claim 1,
The base source, a method of manufacturing a photoluminescent molded body comprising the glass frit surrounding the photoluminescent pigment.
Glass Frit with a melting point of less than 800°C; And
Including a phosphorescent pigment having a concentration of 15 wt% ~ 45 wt%,
The glass frit is disposed to surround the phosphorescent pigment,
A photoluminescent molded article comprising a particle size of the graph frit smaller than that of the photoluminescent pigment.
The method of claim 6,
The photoluminescent molded body includes a first area having a relatively low concentration of the photoluminescent pigment and a relatively high concentration of the glass frit, and a second area having a relatively high concentration of the photoluminescent pigment and a relatively low concentration of the glass frit A photoluminescent molded article comprising what is divided into.
The method of claim 6,
A photoluminescent formed article comprising an atmosphere gas containing _{ammonia (NH 3) penetrated into the surface of the photoluminescent formed article.}
The method of claim 6,
The phosphorescent pigment is a photoluminescent molded article comprising europium (Eu) added as an activator and dysprosium (Dy) added as a study activator to the _{SrAl 2} O _{4 mother crystal.}
A photoluminescent tile comprising the photoluminescent molded article according to claim 6.

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