JPH09100140A - Glass formed body, lighting fixture and production of glass formed body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a glass formed body having both good photocatalytic action and mechanical strengths and lighting fixtures using the glass formed body and easily obtain the glass formed body having good quality. SOLUTION: This glass formed body specifically has a platy glass base body 1 treated with a surface reinforcement processing and a photocatalytic film 2 mainly comprising a metal oxide having a photocatalytic action and formed on the surface of at least one reinforced surface 1a of the glass base body 1. This production of the glass formed body consists of a process for coating a solution containing the photocatalytic ingredient on the surface of the formed glass base body and a process for heating the formed glass base body to a temperature near the softening point to bake the photocatalytic ingredient, carrying out rapid and homogeneous cooling and making a reinforced layer by generating strain in the surface of the formed glass body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tempered glass molded body provided with a photocatalyst film, a lighting fixture using the tempered glass molded body, and a method for manufacturing a tempered glass molded body.

[0002]

2. Description of the Related Art A glass molded body (for example, a glass plate) is used as a light source for a building or a vehicle such as a window, or as a light control body for a lighting fixture. In addition, this type of glass molded product generally has poor mechanical strength such as impact resistance, and easily cracks or damages when it is subjected to an external impact, for example. Be careful. For such a problem of mechanical strength, (1) increase the thickness of the glass molded body,
It is known that (2) quenching from a heated state near the softening point of glass to strengthen it by generating a strained layer on the surface, or (3) strengthening by generating a strained layer on the surface by exchanging a part of glass components by ion exchange.

On the other hand, glass moldings generally have good electrical insulation properties, and are liable to be electrostatically adsorbed (adhered), for example, to oil components and tars of cigarettes, which causes contamination and the like, which is complicated. Clean operation is essential.
In other words, the adhesion of oil components and cigarette tar (organic matter)
For contamination, a cleaning treatment using a detergent or the like will be performed, but there is a high risk of injury due to mechanical damage, and the cleaning operation will inevitably become complicated.

By the way, recently, a substance having a photocatalytic action (for example, TiO 2) is formed on the outer peripheral surface (outer surface) of a glass bulb of a discharge lamp containing mercury that emits ultraviolet rays by electric discharge.
_2. A discharge lamp provided with a (titanium oxide) film is known (Japanese Patent Laid-Open No. 1-169866). In the case of this discharge lamp,
When the photocatalytic film provided on the outer peripheral surface of the bulb receives the ultraviolet rays emitted from the inside of the discharge lamp, the surface becomes activated and becomes oxidative, and it oxidizes and decomposes organic substances that have adhered or come in contact with it to prevent deodorization and prevention. Contributes to dirt.

Here, the wavelength of the irradiation light showing the photocatalytic reaction depends on the energy bandgap of the substance forming the photocatalytic film. For example, the energy bandgap of TiO ₂ is 3 eV, which corresponds to the light energy of 400 nm. Therefore, light of a short wavelength having an energy larger than this value is absorbed by TiO ₂ and exhibits a photocatalytic action. Then, depending on the substance forming the photocatalyst film, the value of this energy band gap may become small. Further, since the value of the energy band gap also varies depending on the impurities, the photocatalytic action is not limited to the ultraviolet irradiation.

The photocatalyst film is prepared by dispersing powder composed of fine particles of a metal oxide having a photocatalytic action in a suitable binder component such as water or ethanol, coating the outer peripheral surface of the glass bulb, and then baking the coating. Is forming. It is also known that fine particles of a metal oxide having a photocatalytic action are applied by an alkoxide method and then baked at a high temperature to form a photocatalytic film.

[0007]

The present inventor has attempted to impart self-cleaning property to a glass molded body for a structural material by utilizing the above photocatalytic action (photocatalytic function). That is, the surface of the soda lime glass molded body that has been strengthened by quenching from a temperature of 600 to 650 ° C is coated with a liquid in which fine particles of a metal oxide having a photocatalytic action are dispersed in a binder component such as water or ethanol, and after drying. , 600 to 650
It was fired at a temperature of ° C to form and have a photocatalyst film. The photocatalyst film has a function of catalytically activating by light or ultraviolet rays received from the outside and easily decomposing / removing, sterilizing / deodorizing an organic substance attached to or in contact with the surface of the photocatalyst film. There is a problem in that the mechanical strength of itself is reduced. In other words, the glass molding has a strain (strengthening layer) generated on the surface during the quenching process.
However, it disappears or is removed at the firing temperature of 600 to 650 ° C that forms the photocatalyst film, resulting in a decrease in impact strength (or a decrease in mechanical strength), resulting in the required mechanical strength and photocatalytic action. It will not function as a glass molded body that also has.

On the other hand, for example, in the case of glass obtained by immersing glass in molten potassium salt and exchanging sodium ions and potassium ions in the glass (chemical strengthening treatment), the firing temperature of 600 to 650 ° C. for forming the photocatalyst film is set. Even with the background,
It was confirmed that no reduction in impact strength (or reduction in mechanical strength) occurred. That is, in the case of chemically strengthened glass, since it is strengthened by conversion of the chemical composition of the surface layer, the ion exchange form is easily broken or destroyed depending on the temperature of the formation (calcination) of the photocatalyst film and the treatment. It was confirmed experimentally that there was not.

The present invention provides a glass molded product having both good photocatalytic action and mechanical strength, a lighting fixture using the glass molded product, and a manufacturing method capable of easily obtaining a glass molded product of good quality. With the goal.

[0010]

According to a first aspect of the present invention, there is provided a plate-shaped glass substrate which has been subjected to a surface strengthening treatment; and a metal oxide having a photocatalytic action provided on at least one surface-strengthened surface of the glass substrate. A glass molded body, which comprises a photocatalyst film mainly composed of a material. Claim 2
The invention described in (1) is characterized in that, in the glass molded body according to claim 1, an underlayer composed mainly of SiO ₂ is interposed between the photocatalyst film and the glass substrate.

The invention of claim 3 is the glass molding according to claim 1 or 2, characterized in that the photocatalyst film is mainly composed of TiO ₂ .

The invention of claim 4 is characterized in that, in the glass molded article of claim 3, TiO ₂ is an anatase type crystal.

According to a fifth aspect of the present invention, in the glass molding according to any one of the first to fourth aspects, the photocatalyst film is provided.
It is characterized by containing at least one kind of oxides of P, B, Al, Sb, Sn and K.

According to a sixth aspect of the present invention, a light source; a surface-strengthened glass type light-suppressing body arranged so as to face the light source; and a facing surface and an anti-facing surface of the light-controlling body to which light from the light source reaches. And a photocatalyst film mainly composed of a metal oxide having a photocatalytic action, which is formed on at least one surface of the luminaire.

According to a seventh aspect of the present invention, a step of applying a liquid containing a photocatalyst component to at least one surface of the shaped glass substrate; heating the shaped glass substrate to a temperature near the softening point of the glass and baking the photocatalyst component. Then, a substantially uniform quenching process is performed, and a step of forming a strengthening layer on the surface of the shaped glass substrate by the occurrence of strain is provided.

According to the invention of claim 8, a step of applying a liquid containing a photocatalyst component to at least one surface of the shaped glass substrate; a step of primarily baking the photocatalyst component applied to the surface of the shaped glass substrate by heating; Heating the shaped glass substrate to a temperature near the softening point of the glass, firing the photocatalyst component, and then subjecting the shaped glass substrate to a substantially uniform quenching treatment to provide a strengthened layer on the surface of the shaped glass substrate due to strain. A method for producing a glass molded body, which comprises:

The invention of claim 9 is characterized in that, in the method for manufacturing a glass molded body according to claim 7 or 8, the quenching treatment is carried out by uniformly blowing a gas.

The invention of claim 10 is the method for manufacturing a glass molded body according to claim 9, wherein the gas for the quenching treatment is air or a gas mainly composed of air.

In the present invention, the plate-shaped glass substrate is made of various kinds of glass such as soda lime glass and Pyrex glass, and is used, for example, for building materials, vehicles, or lighting equipment. The structure and shape are appropriately selected according to the application. Since the softening point temperature varies depending on the type (composition) of these glass materials, the heating temperature at the time of tempering the glass by the quenching process is also set according to the type of the material glass. Also in the case of chemical strengthening treatment, depending on the type (composition) of the glass material, the type of molten salt used for ion exchange,
The processing temperature and the like are appropriately selected.

In the glass molded body according to the present invention, the photocatalytic film provided on the surface-reinforced glass substrate surface is mainly composed of a metal oxide having a photocatalytic action. Here, as the metal oxide having a photocatalytic action, for example,
TiO ₂ , ZnO, WO ₃ , LaRhO ₃ , FeTiO ₃ , Fe ₂ O ₃ ,
Examples thereof include fine particles of CdFe ₂ O ₄ , SrTiO ₃ , CdSe, GaAs, GaP, RuO _{2 and the} like, or a mixed system of two or more kinds of fine particles. In particular, fine particles mainly composed of at least one of crystalline TiO ₂ and ZnO, for example, having an average particle size of about 5 to 70 nm, and further, anatase type TiO ₂ is preferable. The thickness of the photocatalytic film is 0.1 to 100 nm, preferably 0.5 to 30 nm.
nm, more preferably 1 to 15 nm. The photocatalyst film preferably contains at least one selected from oxides of P, B, Al, Sb, Sn, and K. That is, the oxide components of P, B, Al, Sb, Sn, and K are 0.1% by weight.
By adding and blending about 15%, the expansion coefficient of the photocatalyst film becomes close to that of the glass substrate (the wettability with the glass substrate surface is also good), so it functions as a photocatalytic film with excellent peeling resistance. Is.

Further, the photocatalyst film may be directly provided on the surface of the glass substrate, but a structure in which a SiO ₂ layer is interposed and arranged as a base layer between the glass substrate surface and the photocatalyst film is adopted. In this case, unwanted elemental components from the glass substrate side are prevented from invading the photocatalyst film, and the photocatalytic action can be extended.

The formation of the photocatalytic film and the strengthening of the glass substrate are performed as follows. For example, a metal oxide fine particles having a photocatalytic activity, such as TiO ₂ having an average particle size of less than 5 nm, the metal oxide fine particles having a photocatalytic activity, such as TiO ₂ having an average particle size of 5 to 70 nm, for example tetraisopropyl titanate monomers or tetra A suspension or dispersion prepared by adding and dispersing it in a solution of an alkoxy titanate compound such as isopropyl titanate polymer is applied to the surface of the glass substrate, and if necessary, calcined and then heated to a temperature near the softening point of the glass substrate. Then, the metal oxide fine particles are baked (firing), and then, for example, compressed air is blown almost uniformly over the whole to perform a rapid cooling process to form a required photocatalyst body and to form a glass substrate. Can be strengthened. More specifically, for example, an anatase type crystal having an average particle size of about 5 to 10 nm is added to a titanium alkoxide solution.
Apply a suspension / dispersion of TiO ₂ particles to the glass substrate surface,
While TiO ₂ with an average particle size of less than 5 nm is crystallized from the titanium alkoxide component by firing at a temperature near the glass softening point, when it is quenched to form a strained layer on the glass substrate surface and mechanically strengthened, titanium The same hardness and strength as the optical system film made of alkoxide component, and an average particle size of 5
It is possible to obtain a toughened glass molded body provided with a photocatalyst body exhibiting a photocatalytic effect similar to that of a photocatalyst film formed only of TiO ₂ fine particles of ˜70 nm.

In the quenching treatment here, a substantially uniform strained layer is formed over the entire surface of the glass substrate, and the cooling gas is substantially evenly distributed over the entire surface in order to impart required mechanical strength. As the cooling gas, various ones such as compressed air and nitrogen gas can be used, but from the viewpoint of cost, air or a mixed gas mainly containing air is preferable.

According to the first aspect of the present invention, since the surface-reinforced glass is used as a substrate and the photocatalytic film mainly containing a metal oxide having a photocatalytic action is provided on the surface of the glass substrate, the impact resistance strength is improved. While functioning as an excellent structural material and the like, it decomposes and removes organic substances to which the photocatalytic film on the surface adheres or contacts, so that it can be used as a glass molded body that contributes to stain resistance and sterilization.

According to the second aspect of the present invention, the underlying layer mainly composed of SiO ₂ is interposed between the photocatalyst film and the glass substrate, and deterioration of the photocatalyst film is prevented and suppressed. The life of action and effect can be extended.

In the invention of claim 3, since the photocatalyst film is mainly composed of TiO ₂ , the photocatalytic action of claim 1 or 2 can be more effectively performed.

In the invention of claim 4, since TiO ₂ is an anatase type crystal, the photocatalytic action of claim 3 is promoted.

According to the invention of claim 5, P, B,
Due to the inclusion of at least one of Al, Sb, Sn and K oxides, peeling resistance and adhesion to the glass substrate surface
It has improved adhesion and functions as a glass molding with excellent durability.

According to the sixth aspect of the present invention, the glass molded body having the photocatalytic film mainly composed of a metal oxide having a photocatalytic action on the surface of the surface-strengthened glass substrate is used as the light control body for the light source, so that durability is improved. It functions as a lighting fixture with excellent stain resistance and sterilization.

In the invention of claim 7, the tempering treatment of the glass substrate surface by quenching is carried out by utilizing the baking step of the photocatalyst component, so that no complicated work is required and the required glass substrate surface is obtained. A uniform strain is generated to ensure the formation of a generally uniform reinforcing layer. That is, it is possible to provide a glass molded body having mechanical strength, stain resistance, and sterilization with good yield and at low cost.

In the invention of claim 8, the applied photocatalyst component is primarily calcined before the photocatalyst component is calcined. Therefore, the action of claim 7 can be more easily and surely performed. In the invention of claim 9, since the rapid cooling process is performed by uniformly spraying the gas, the rapid cooling process according to the seventh and eighth aspects proceeds more easily and uniformly.

According to the tenth aspect of the invention, since the quenching treatment is air or a gas mainly composed of air, the method for producing a glass molded body has a lower cost and is more versatile.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

Example 1 FIG. 1 is a cross-sectional view showing an example of the essential structure of a glass molded body according to this example, where 1 is 5 mm thick, 300 mm wide, and long.
A 300 mm glass substrate (for example, a soda lime glass plate), 1a is a surface reinforcing layer (strain generating layer) of the glass substrate 1, and 2 is a photocatalytic film provided on the surface of the glass substrate 1 on the surface reinforcing layer 1a. Here, the photocatalyst film 2 is crystalline T
It is formed in the TiO ₂ ultrafine particle region having a photocatalytic action for dispersing and supporting iO ₂ fine particles and crystalline fine particles.

Next, an example of a method for manufacturing the glass molded body will be described. First, a product obtained by chelating a tetraisopropyl titanate monomer with glycerin and acetylacetone and a glass-forming agent (B ₂ O ₃ ) were added to an ethyl acetate-ethanol mixed solvent to form a solution, and then, in this mixed solution, an average was obtained. A suspension is prepared by dispersing and suspending anatase crystal type TiO ₂ ultrafine particles having a particle size of 7 nm and a specific surface area of 300 m ² / g. The thickness prepared in advance in this suspension
A 5 mm soda lime glass substrate (300 x 300 mm) is dipped and applied, then calcined at 300 ° C for 15 minutes and then calcined at 600 to 650 ° C for 15 minutes to obtain anatase crystalline TiO ₂ particles. And, after forming a photocatalyst film with a film thickness of 0.2 to 0.4 μm, which is mainly composed of TiO ₂ ultrafine particle phase, on both sides of the soda lime glass substrate on which the photocatalyst film was formed, compressed air was almost uniformly applied for about 3 minutes. The soda lime glass substrate was sprayed and quenched from 600 to 650 ° C. to prepare a glass molded body with a photocatalyst film.

When the glass molded body with the photocatalyst film was cut in the thickness direction and the sectional state of the soda lime glass substrate was inspected, the surface was uniformly distorted over a substantially constant depth, It was confirmed that the reinforcing layer 1a was formed. Further, the connection state of the photocatalyst film 2 to the soda lime glass substrate 1 was strong, and the peeling resistance was excellent.

Furthermore, even if an impact was applied to the glass molded body with the photocatalyst film in the thickness direction, it did not change from the strength of conventional tempered glass and had excellent impact resistance. In addition, when a cigarette tar was attached to the photocatalyst film surface of this glass molded body, it was hung in the sun and left standing, and the state of decomposition and removal by the catalytic action of the photocatalyst film was observed, and it was found that sufficient cleaning was achieved. The action was confirmed.

[0038] In the above, the photocatalyst substance suspension for forming the photocatalyst film has been added B ₂ O _3, B ₂ O
_{Al 2 O 3, Sb 2 O} 3 Similar results using a instead of ₃ were observed. Further, the peel resistance of the photocatalyst film did not pose a practical problem even without adding B ₂ O ₃ or the like.

Example 2 FIG. 2 is a cross-sectional view showing an example of the essential structure of a glass molded body according to this example, where 1 is 5 mm thick, 300 mm wide and long.
300 mm glass substrate (for example, soda lime glass plate), 1a is a surface strengthening layer (strain generation layer) of the glass substrate 1, 3 is a base layer (or protective layer) provided on the surface of the glass substrate 1 surface strengthening layer 1a ₂ ) is a photocatalyst film provided on the surface of the underlayer 3. here,
The photocatalyst film 2 is formed of crystalline TiO ₂ fine particles and a TiO ₂ ultrafine particle region having a photocatalytic action for dispersing and carrying the crystalline fine particles.

Next, an example of a method for manufacturing the glass molded body will be described. First, a solution prepared by dissolving an organosilicon compound, for example, tetraethyl silicate, in a solvent such as ethyl alcohol was prepared. Further, tetraisopropyl titanate monomer chelated with glycerin and acetylacetone, and a glass-forming agent (P ₂ O ₅ ) were added to an ethyl acetate-ethanol mixed solvent to form a solution, which was then averaged in this mixed solution. A suspension is prepared by dispersing and suspending anatase crystal type TiO ₂ ultrafine particles having a particle size of 7 nm and a specific surface area of 300 m ² / g.

Then, a 5 mm thick soda lime glass substrate (3
(00 × 300 mm) is applied by dipping, and then baked at 500 ° C. for 15 minutes to form a SiO ₂ film with a thickness of 0.01 to 1 μm. Then, the soda-lime glass substrate on which the SiO ₂ film is formed is applied in a Ti-based suspension by a dipping method,
Temporary calcination for 15 minutes at ℃. Continuously 600 to 650
℃ × 15 minutes firing treatment, anatase crystal type TiO ₂
Thickness mainly of fine particles and TiO ₂ ultrafine particle phase 0.2〜
After forming a photocatalyst film of about 0.4 μm, put it on both sides of the soda lime glass substrate with the photocatalyst film formed on it for about 3 minutes.
A soda lime glass substrate was rapidly cooled by blowing compressed air almost uniformly to prepare a glass molded body with a photocatalytic film.

When the glass molded body with the photocatalyst film was cut in the thickness direction and the cross-sectional state of the soda-lime glass substrate was inspected, the surface was uniformly distorted over a substantially constant depth. It was confirmed that a reinforcing layer was formed.
Further, the underlying layer 3 and the photocatalyst film 2 were firmly connected to the soda-lime glass substrate 1, and the peeling resistance was excellent.

Furthermore, even if an impact was applied to the glass molded body with the photocatalyst film in the thickness direction, it did not change from the strength of conventional tempered glass and had excellent impact resistance. In addition, when a cigarette tar was attached to the surface of the photocatalyst film 2 of this glass molded body, it was hung in the place where it was exposed to sunlight, and the state of decomposition and removal by the catalytic action of the photocatalyst film 2 was observed. In addition to confirming the cleaning action, it was also confirmed that the interposition of the underlayer 3 prevents the photocatalytic film 2 from adversely affecting the soda-lime glass substrate 1 side and maintains the required photocatalytic action for a long period of time.

FIG. 3 shows an application example of the glass molded body with the photocatalyst film. That is, it is a cross-sectional view showing the main configuration of an embodiment in which the glass molded body manufactured by the above manufacturing method is used as a light control body for a lighting fixture. In FIG. 3, reference numeral 4 is a device body, 5 is a light source socket provided in the device body 4, 6 is a light source (lamp) mounted in the light source socket 5, and 7 is light emitted from the light source 6 in a predetermined direction. A reflecting mirror that reflects and collects and emits light, and 8 is a light control body that is mounted and arranged in the light emitting portion of the instrument body 4 so as to face the reflecting mirror 7. Here, the light control body 8 is a glass molded body with the above-mentioned photocatalyst film, and has a surface-reinforced glass substrate 1, an underlayer 3 provided on the surface-reinforced surface of this glass substrate, and a photocatalyst provided on the underlayer 3 surface. The photocatalyst film is mainly composed of a metal oxide having a function.

In the luminaire having the above structure, the light control unit 8
Since it is made of tempered glass, there is no concern that it will be damaged by an impact such as an external force, and it can be used as a highly reliable lighting fixture and float on the front side of the light control body 8 Easily decomposes and removes organic substances adhered to or contacted with the photocatalyst film of 8, and deodorizes, or sterilizes bacteria floating in the peripheral area. In other words, it will function as a lighting device that also serves as a light source for lighting and as a sterilizer / deodorizer.

[0046] In the above, the photocatalyst substance suspension for forming the photocatalyst film has been added P ₂ O _5, P ₂ O
Similar results were observed when B ₂ O ₃ , Al ₂ O ₃ , Sb ₂ O _3, etc. were used instead of ₅ . Further, the peel resistance of the photocatalytic film did not pose a practical problem even without adding P ₂ O ₅ or the like.

Example 3 First, a soda lime glass substrate having a thickness of about 5 mm was immersed in a molten potassium salt at about 400 ° C. for 16 hours, and sodium ions were partially exchanged with potassium ions on the surface layer of the soda lime glass substrate. A chemically strengthened glass plate was prepared.
On the other hand, a solution was prepared by dissolving an organotitanium compound such as alkoxy titanate in an ethyl alcohol-based solvent.

Next, the chemically strengthened glass substrate is dipped in a solution of the organotitanium compound and pulled up at a constant speed,
A glass compact having a TiO ₂ -based photocatalyst film formed on the surface was obtained by heating at a temperature of about 600 ° C. and performing a baking treatment. In addition, in the case of this embodiment, the preparation of the photocatalyst film forming solution, the coating process, the baking process, etc. are relatively simplified, so that the manufacturing process can be shortened.

The glass molded body with the photocatalyst film was cut in the thickness direction, and the cross-sectional state of the soda-lime glass substrate was inspected. The connection of the film was strong and the peeling resistance was excellent.

Further, even if the glass molded body with the photocatalyst film was subjected to an impact from the thickness direction, it had an excellent impact resistance without changing from the original strength of the chemically strengthened glass. In addition, when a cigarette tar was attached to the photocatalyst film surface of this glass molded body, it was hung in the sun and left standing, and the state of decomposition and removal by the catalytic action of the photocatalyst film was observed, and it was found that sufficient cleaning was achieved. The action was confirmed.

The glass molded body with the photocatalyst film was applied, for example, as a front glass (light control body) of an automobile headlight (lighting equipment). That is, in the structure according to FIG. 3, the photocatalyst is provided as a front glass (light control body) 8 on the light emitting portion of the instrument body 4 facing the reflecting mirror 7 that reflects and collects the light emitted from the light source 6. A glass molded body with a film was attached and arranged.

In the luminaire having the above structure, since the front glass (light control body) 8 is formed of tempered glass, the fear of being damaged by an external force or the like is eliminated, and the luminaire is highly reliable. Not only can it be used, but it also functions as a headlight that also functions to easily decompose / remove and deodorize organic components that float on the front side of the front glass 8 and adhere to or contact the photocatalyst film. Moreover, since the front glass 8 is mechanically reinforced as described above and the photocatalyst film has excellent peeling resistance, it can be said that it is a highly durable antifouling headlight.

Further, on the chemically strengthened glass substrate,
Under the same conditions as in Example 1 and Example 2, a photocatalyst film was formed to form a glass molded article with a photocatalyst film, and the same test evaluation as above was performed. Admitted.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the invention. For example, the glass material of the glass molded body may be Pyrex glass or the like other than soda lime glass, and the form, thickness, etc. can be arbitrarily selected according to the application.

[0055]

According to the first aspect of the present invention, while functioning as a structural material having excellent impact resistance, etc., it decomposes and removes organic substances on or to which the photocatalytic film on the surface adheres, so that it is resistant to pollution. It can be used as a building material, a glass material for vehicles, a lighting equipment member, etc.

According to the second aspect of the present invention, deterioration of the photocatalyst film is prevented and suppressed, so that a reinforced glass molded product with a photocatalyst film having a long life of photocatalytic action is provided.

According to the inventions of claims 3 and 4,
Provided is a reinforced glass molded body with a photocatalyst film, which further promotes the photocatalytic action.

According to the invention of claim 5, since the adhesion and adhesion of the photocatalyst film to the glass substrate are improved, a reinforced glass molded product with a photocatalyst film having excellent durability is provided.

According to the sixth aspect of the present invention, it is possible to provide a lighting fixture having durability, stain resistance and sterilization.

According to the inventions of claims 7 and 8,
It is possible to provide a reinforced glass molded body with a photocatalyst film having mechanical strength, stain resistance and bactericidal property with good yield and at low cost.

According to the inventions of claims 9 and 10,
Since the rapid cooling process is performed easily and uniformly, it is possible to provide a reinforced glass molded product with a photocatalyst film at a low cost with a good yield.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing a configuration of a main part of a glass molded body according to a first embodiment.

FIG. 2 is a cross-sectional view schematically showing a main part configuration of a glass molded body according to a second example.

FIG. 3 is a cross-sectional view showing a configuration of a main part of an embodiment of a lighting device.

[Explanation of symbols]

 1 …… Glass substrate 1a …… Glass strengthening layer 2 …… Photocatalyst film 3 …… Base layer 4 …… Device body 5 …… Light source socket 6 …… Light source 7 …… Reflecting mirror 8 …… Light control body

Claims (10)

[Claims] 1. A plate-shaped glass substrate that has been subjected to a surface strengthening treatment; and a photocatalytic film mainly composed of a metal oxide having a photocatalytic action, which is provided on at least one surface-strengthened surface of the glass substrate. A glass molded body characterized by being. 2. The glass molded body according to claim 1, wherein an underlayer mainly composed of SiO ₂ is interposed between the photocatalyst film and the glass substrate. 3. The glass molded body according to claim 1, wherein the photocatalyst film is mainly composed of TiO ₂ . 4. The glass molded body according to claim 3, wherein TiO ₂ is an anatase type crystal. 5. The glass according to claim 1, wherein the photocatalytic film contains at least one kind of oxides of P, B, Al, Sb, Sn and K. Molded body. 6. A light source; a surface-strengthened glass-based light-suppressing body that is disposed so as to face the light source; A photocatalyst film mainly composed of a metal oxide having a photocatalytic action formed on one surface; 7. A step of applying a liquid containing a photocatalyst component to at least one surface of the shaped glass substrate; heating the shaped glass substrate to a temperature near the softening point of the glass, and calcining the photocatalyst component to almost one step. And a step of providing a strengthening layer on the surface of the molded glass substrate by the occurrence of strain as described above, and a method for producing a glass molded body. 8. A step of applying a liquid containing a photocatalyst component to at least one surface of a shaped glass substrate; a step of primarily firing the photocatalyst component applied to the surface of the shaped glass substrate by heating; Heating to a temperature near the softening point of the glass, firing the photocatalyst component, and then subjecting it to a substantially uniform quenching treatment to provide a strengthened layer on the surface of the shaped glass substrate due to strain, A method for producing a molded glass article. 9. The method for producing a glass molded article according to claim 7, wherein the quenching treatment is performed by uniformly blowing a gas. 10. The method for producing a glass molded body according to claim 9, wherein the gas for the quenching treatment is air or a gas mainly containing air.