JPH0694377B2 - Infrared UV absorbing glass and its manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infrared ray absorbing glass which has a relatively high transparency and absorbs infrared rays and ultraviolet rays so that it can be made highly comfortable and highly safe, and can be made lighter. Not to mention glass and various glass articles,
Particularly, the present invention provides the above-mentioned glass useful for a window glass for vehicles and a method for producing the same.

[0002]

2. Description of the Related Art In recent years, due to abundant energy saving such as cooling load reduction or deterioration and fading of organic matter,
By adding multi-functionalization such as reflection and absorption of infrared rays and ultraviolet rays to the glass itself or the glass surface, there is a rapidly increasing need for a flat glass article that leads to higher habitability both physically and physically.

Therefore, in addition to the conventional infrared absorbing glass, glass considering ultraviolet absorption is being further proposed. For example, in JP-A-64-18938, at least 0.45% by weight of iron represented by Fe ₂ O ₃ is represented. A continuous flow of molten glass having a controlled flow rate, controlling the redox conditions during the melting operation to give at least 35% of iron in the ferrous state, expressed as FeO, and shaping the glass into a flat glass product in a shaping operation. And the flat glass has at least 65
Disclosed is a method for producing soda-lime-silica flat glass by a continuous method having a light transmittance of 15% and an infrared transmittance of 15% or less, and represented by Fe ₂ O ₃ in the glass is 0.65%.
It is stated that it is preferable that a lower total iron content is given or that the sulfur content of the product glass is represented as SO _{3 and} less than 0.02%, and is also represented as Fe ₂ O _3. At least 0.45% by weight of total iron, of which at least 50% has iron in the ferrous state, expressed as FeO, and less than 0.02% by weight, expressed as SO ₃ , with a light transmission of at least 65%. And 15%
Discloses a soda-lime-silica glass article having the following total solar infrared transmittance, the glass article, based on the weight, 66-75% of SiO _2, 12 to 20 percent of Na ₂ O, 7 ~ 12%
CaO, 0-5% MgO, 0-4% Al ₂ O ₃ , 0-3%
K ₂ O, 0 ~1% of Fe ₂ O _3, and _{CeO 2, TiO 2, V 2} O 5 or Mo
Preference is given to those having a composition consisting essentially of 0 to 1.5% of total O ₃ . Furthermore, U.S. Pat. No. 47
No. 01425, expressed as% by weight, 60-80% SiO ₂ , 10-20
% Na ₂ O, 0-10% K ₂ O, 5-16% CaO, 0-10%
Of MgO, 0 to 5% of Al ₂ O _3, 0 ~0.5% of SO _3, 0.29 to
0.6% Fe ₂ O ₃ , 0.1-1.5% SnO ₂ , 0.1-1.6%
Glass compositions are disclosed for absorbing infrared light and ultraviolet light consisting essentially of TiO _2.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, for example, the one disclosed in JP-A-64-18938, the SO ₃ component is
Since it is less than 0.02% by weight, it is difficult to obtain a desired infrared-ultraviolet-absorbing glass by a melting operation means in the production of a flat glass by a normal float method, and various complicated means steps such as a liquefaction step and a melting step. , A fining stage, a stirring chamber, a stirrer, etc. are required, and it is difficult to say that the one described in US Pat. However, it is hard to say that it is always sufficiently excellent.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the prior art, and has a large thermal expansion coefficient, a Young's modulus and a Poisson's ratio and a small thermal conductivity. In addition, the infrared ray having sufficient absorption of infrared rays and ultraviolet rays, exhibits a relatively transparent green color tone, and has sufficient weather resistance and moldability. An ultraviolet absorbing glass and a method for producing the same are provided.

That is, the present invention is expressed in% by weight,
Substantially the following oxides, 68-72% SiO ₂ , 1.6-3.0
% Al ₂ O ₃ , 8.5-11.0% CaO, 2.0-4.2% MgO, 12.0
~ 16.0% Na ₂ O, 0.5 ~ 3.0% K ₂ O, 0.08 ~ 0.30% SO ₃ ,
0.65 to 0.75% Fe ₂ O ₃ , 0.20 to 0.35% CeO ₂ , 0.1 to 0.2%
TiO ₂ , as well as MnO 5 ~ 300ppm as a trace component,
The sum of these components is 98% or more, and 70.0 to 74.0
% SiO ₂ + Al ₂ O ₃ + TiO ₂ , 12.0 ~ 15.0% CaO + MgO, 1
Infrared UV absorbing glass characterized by 3.5 to 17.0% Na ₂ O + K ₂ O. Also, in terms of 5 mm thickness, visible light transmittance by A light source is 67% or more, solar radiation transmittance is 37 ~ 45%,
The above infrared-ray ultraviolet absorbing glass, which has an ultraviolet transmittance of 7 to 13%, a main wavelength of 506 to 518 nm, and a stimulus purity of 3.5 or less. Furthermore, when manufacturing the infrared-ultraviolet-absorbing glass, ilmenite as a raw material, or
And a method for producing an infrared and ultraviolet absorbing glass, characterized in that at least one of metal powder or oxide such as carbon, Zn, Sn or the like is used as a trace amount raw material.

Here, the reason why the SiO ₂ component is 68 to 72% by weight is that if it is less than 68%, the surface is likely to be burnt or the like, and the weather resistance is lowered to cause a practical problem. 72%
If it exceeds 1.0%, its easy strengthening property decreases and it becomes difficult to melt it. The reason why the Al ₂ O ₃ component is 1.6 to 3.0% by weight is that if it is less than 1.6%, the weather resistance decreases and the surface is burnt. If it exceeds 3%, devitrification is likely to occur, the molding temperature range is narrowed, and the manufacturing becomes difficult, and the CaO component is 8.5% by weight.
〜11.0% means that if it is less than 8.5%, the easy strengthening property will decrease, and as a fluxing agent, it will be insufficient and the melting temperature will rise, and the flow temperature will not be lowered, making it difficult to manufacture.
If it exceeds, devitrification is likely to occur, the molding work range is narrowed, and manufacturing becomes difficult, and the MgO component is 2.0% by weight.
4.2% and was of, in less than 2.0% less likely to manufacture since narrow the operating range melting temperature rises, which decreases ease reinforcing exceeds 4.2%, by weight of Na ₂ O component
The range of 12.0 to 16.0% is that if it is less than 12.0, the easy strengthening property decreases, moldability becomes difficult, and devitrification easily occurs, so the operating range is narrowed and it becomes difficult to manufacture, and if it exceeds 16%, the weather resistance decreases, are those made burnt like easily occurs practical problems arise in the surface, 0.5 a K ₂ O component in weight%
The reason for setting 3.0% is that if it is less than 0.5%, the easiness of strengthening decreases.
Exceeds 3.0%, the weather resistance is lowered and cost is intended also increased, to that with 0.08 to 0.30% of SO ₃ component in weight percent, on degassing or homogeneity is less than 0.08% for example, in conventional melt non It can be made only to the extent that it easily becomes sufficient, and when it exceeds 0.30%, it particularly affects the coloring state of the glass, and it is easy to shift to a yellowish or amberish tone, for example, and the desired greenish tone is obtained. This is because it disappears, and it is preferable that it is around 0.15%, which is rather low even within the range.

Further, the Fe ₂ O ₃ component is 0.65 to 0.75% by weight.
The total amount of FeO component that absorbs infrared rays and Fe ₂ O ₃ component that absorbs ultraviolet rays and secures the desired color tone is
In order to stably obtain the various optical characteristics described above, other Ce
It is necessary to be together with the amount of each component such as O ₂ and TiO ₂ , and 0.65
%, The action against the above is inferior, and if it exceeds 0.75%, the visible light transmittance is particularly inferior, which is not preferable, and the CeO ₂ and TiO ₂ components have an ultraviolet absorbing action,
CeO ₂ component is 0.20 to 0.35%, TiO ₂ component is 0.1 to 0.2%
And the is given a little varied Moreover ultraviolet absorptivity CeO ₂ component is less than TiO ₂ component reduction rate of the glass, giving sufficiently relatively greatly varied Moreover ultraviolet absorbing ability of the reduction rate of the glass and a CeO ₂ component By limiting the combination within the above-mentioned specific range, the desired characteristics can be efficiently obtained with a small content, while the conventional reduction rate is hardly changed, while the value of Ce in the glass is reduced. The number
Ce ^4+, among Ce ^3+, as nearly colorless Ce ³⁺ is mainly to control the ratio of the FeO and Fe ₂ O ₃ in the total iron as described above, the entire transmittance of visible light region In order to achieve desired optical characteristics such as ultraviolet absorption and infrared absorption.
The reason for setting 300 ppm is that the relationship between Fe and Mn tends to oxidize Fe and the reduction rate tends to be low although it is a small amount, and the relationship between Ce and Mn indicates that Mn is oxidized. Mn is Fe
And Ce et al.
It is possible to adjust the color tone with a slight force without having a great influence on the absorption wavelength of MnO near 0 nm, and if a large amount of MnO component is used, for example, a phenomenon such as solarization is expressed. It is made so as not to exceed 300ppm because it becomes easier.

Further, SiO ₂ , Al ₂ O ₃ , CaO, MgO, Na ₂ O,
The sum of the components of K ₂ O, Fe ₂ O ₃ , SO ₃ , CeO ₂ , TiO ₂ , and MnO was defined as 98% or more by weight percentage because the amount of trace components such as ZnO and SnO ₂ does not exceed 2%. This is because it is controlled. Of these, the V ₂ O ₅ component may be added as an optional component in an amount of 0 to 0.25%, and the V ₂ O ₅ hardly changes the reduction rate and has a smaller ultraviolet absorption capacity than the CeO ₂ component and less influence. This is because it is used for fine adjustment, and it is necessary to reduce the valence of V in the glass from V ^5+, which exhibits yellow, to V ³⁺ , which exhibits green, as much as possible. is there.

Furthermore, the reason that the weight percentage of SiO ₂ + Al ₂ O ₃ + TiO ₂ is 70.0 to 74.0% is that if it is less than 70%, the weather resistance is deteriorated, and if it exceeds 74%, the easy strengthening property is deteriorated. The reason why CaO + MgO is set to 12.0 to 15.0% by weight is that CaO and MgO components are used for lowering the melting temperature, and if less than 12%, the easy strengthening property deteriorates.
If it exceeds%, devitrification is likely to occur and it will be difficult to manufacture. Therefore, the percentage of Na ₂ O + K ₂ O of 13.5 to 17% is 1%.
If it is less than 3.5%, the easy strengthening property is deteriorated, devitrification is likely to occur, the working temperature range in molding is narrowed, and the manufacturing becomes difficult. If it exceeds 17%, the weather resistance is deteriorated and practical problems occur. The cost is also high.

Furthermore, in terms of 5 mm thickness, visible light transmittance by A light source is 67% or more, solar radiation transmittance is 37 to 45%, ultraviolet transmittance is 7 to 13%, dominant wavelength is 506 to 518 nm, and stimulation is It is preferable that the purity is 3.5 or less, because when the visible light transmittance is less than 67%, the visibility of the glass is particularly noticeable in the windshields of automobiles, especially in the case of nightfall, nighttime or rain, etc. Is less likely to occur, more preferably around 70%, even more preferably around 75%, and if the solar radiation transmittance exceeds 45%, the cooling load will increase or the habitability inside / inside the vehicle will be improved. If it is less than 37%, it is not preferable because the transparency may affect the deterioration of the above-mentioned distinctiveness or the color tone.
If it exceeds%, it is easy to lead to deterioration of habitability due to human influence such as discoloration / deterioration of articles in the car / room or skin burn,
If it is less than 7%, for example, adverse effects such as the inability to obtain the solar radiation transmittance tend to occur, and if the dominant wavelength exceeds 518 nm, the desired green tone system is not formed due to the influence of yellow or amber, and if it is less than 506 nm. This is because the blue color is too predominant to produce the desired green color tone, and the preferred dominant wavelength is 509 to 515.
If the stimulus purity exceeds 3.5, the identification of the object will be deteriorated and the visibility of the occupant will be hindered due to, for example, nightfall or heavy rain, making it difficult to secure safety. is there. The ultraviolet range was 290 to 390 nm, and the visible range was the same as before.

Further, it is preferable to use ilmenite as a raw material in producing the infrared-ultraviolet-absorbing glass because FeO and TiO _{2 are} substantially contained, so that FeO can be easily incorporated into the glass. In addition, the operating conditions etc. of the actual kiln are almost unchanged, and the redox state of the glass is not changed as much as possible, that is, the reduction rate is about 0.45 in the actual kiln, whereas the infrared and ultraviolet absorption of the present invention is This is because in the production of glass, it is possible to add a variety of actions such as CeO ₂ to make it about 0.3 to 0.4 (for example, about 70% of the reduction rate of the actual kiln), which is a little useful.
It is preferable to use at least one of metal powders and oxides such as carbon, Zn, and Sn as a trace amount of raw material. For example, it is sometimes necessary to help the effect of a fining agent such as Glauber's salt (Na ₂ SO ₄ ). On the other hand, on the other hand, it is likely to have a bad influence on ensuring the desired color tone, and a reducing agent such as Zn or Sn may be necessary in order to adjust the balance between Fe ₂ O ₃ and FeO. .

The infrared and ultraviolet absorbing glass of the present invention is an easily tempered glass composition, which is a thin glass sheet having a thickness of about 1 mm to a thick glass sheet having a thickness of about 10 mm, which is a flat plate or a bent plate with an increased strength from a green plate, Semi-strengthened, reinforced, etc., which are useful as single-plate glass, laminated glass, laminated glass or multi-layered glass, and especially as window glass for vehicles.

[0014]

As described above, in the infrared and ultraviolet absorbing glass of the present invention and the method for producing the same, a glass in which a specific oxide component is combined in a specific composition range is used, or a unique raw material is provided with an easily strengthening property and a reduction ratio of Used in combination to suppress the reduction, by producing the above-mentioned glass, for example, meltability, fining, weather resistance, formability, devitrification, cost, etc., in consideration of the conventional float glass production conditions and It hardly changes the properties of glass,
In addition, it has an easy strengthening property, absorbs infrared rays and ultraviolet rays, and has a high habitability in terms of human physical properties, and it has sufficient transparency for distinguishing objects, ensuring a high degree of safety. In the color tone system, for example, it is in good harmony with the interior and exterior of the car, making it environmentally superior.
Even thin glass, which could not be obtained by conventional heat strengthening methods, will be able to obtain a sufficient degree of strengthening or strength increase, and not only architectural window glass but also furniture glass, cooking glass, especially automobiles and other vehicles. It is possible to provide an infrared and ultraviolet absorbing glass which is useful as a window glass for windows.

[0015]

EXAMPLES Examples of the present invention will be described below.

Example 1 According to a conventional method, glass is selected silica sand (manufactured by Kyoritsu Kiln Co., Ltd.) and first-grade reagents Al ₂ O ₃ , Fe ₂ O ₃ , CaCO ₃ , MgCO ₃ , Na ₂ S.
Using O ₃ , KNO ₃ , CeO ₂ , TiO ₂ , MnO, ilmenite, etc.,
Viscosity temperature 650-685 ° C at 10 ⁹ poise, 55 at 10 ¹² poise
Weigh and mix a glass composition that is 5 to 585 ℃ and the temperature difference between them is 96 to 103 ℃ as the target composition, especially carbon in order to obtain a slightly lower reduction rate (about 0.35) with the actual kiln. 0.175% by weight was added and blended,
The prepared raw material was put in a crucible and melted and vitrified for about 3 hours in an electric furnace kept at about 1450 ° C, and further held at 1420 to 1430 ° C for about 2 hours for homogenization and clarification, 100 m in size as a glass block poured into a mold
Each sample was cut into a glass plate having a size of m × 100 mm and a thickness of about 5 mm, ground and polished.

[0017] For this sample, the glass component composition (wt%) is carried out by a wet analytical method based on JISR-3101, for the viscosity temperature (℃) by measuring the viscosity curve by bending arms method 10 ⁹ and 10 ¹² The poise temperature is calculated, the strain point is measured by the Lily method, and the softening point is measured by the Lyttelton method, and the visible light transmittance (% at A light source) and the ultraviolet transmittance (%) as optical characteristics (at a thickness of 5 mm) are measured. , And solar radiation transmittance, dominant wavelength (nm), and stimulus purity are obtained by measuring and calculating with 340 type self-recording spectrophotometer (manufactured by Hitachi, Ltd.) and JIS Z-8722, JIS R-3106, ISO / DIS-9050. And so on.

As a result, the glass composition was
O₂69.7%, Al₂O₃1.9%, CaO9.1%, MgO3.5%, Na₂O13.4
%, K₂O1.0%, Fe₂O₃0.695%, TiO₂0.15%, CeO₂0.27
%, SO ₃0.18%, MnO 108ppm, the sum of the components is 99.9
06% and SiO₂＋ Al₂O₃+ TiO₂71.75%, CaO + Mg
O12.6%, Na₂O + K₂O14.4% and reduction rate (Fe²⁺/ Fe
³⁺) Was about 0.30 to 0.35.

The optical characteristic is that the visible light transmittance is 71.3
%, Solar radiation transmittance 43%, dominant wavelength 512.2nm, stimulation purity
It was 2.8, which was the expected green color tone.

Further, regarding the easy strengthening property, the above-mentioned glass has the above-mentioned viscous temperature clearing a predetermined specific range, and the temperature difference between the softening point and the strain point is about 200-.
After confirming that the temperature is in the range of 240 ℃, after heating the sample for about 5 minutes in a furnace with an ambient temperature of about 730 ℃, normal air-cooling strengthening at an air pressure of about 1300 Ap, size 120mm × 100mm
To obtain a tempered glass plate with a plate thickness of about 3.5 mm, crush it by giving a shock at a position of about 30 mm from the corner end face of the corner portion of the tempered glass plate, and crushing the whole glass plate to JIS R-3211 According to the examination, it was found to be a material with high easiness of strengthening which sufficiently satisfies the specified standard.

The bent infrared and ultraviolet absorbing glass of the present invention having a thickness of about 2.5 mm is used on the outside, and the heat-reflecting film-covered bent glass plate having a thickness of about 2 mm is arranged on the inside, with the film side facing inside.
When a laminated glass laminated with a PVB interlayer film was prototyped and used as a window glass for automobiles, the function and effect of the present invention were enhanced, and it was further multifunctionalized, and it had better habitability inside and outside the vehicle and better safety. It was something that was

Example 2 The same glass raw materials as in Example 1 were used, weighed and blended,
A melting operation was performed, and the obtained glass was similarly sampled.

The obtained sample was analyzed, measured and evaluated in the same manner as in Example 1, and as a result, the glass component composition was expressed by weight, SiO ₂ 70.6%, Al ₂ O ₃ 1.6%, CaO 9.5%, MgO 2.5%. ,
Na ₂ O 13.5%, K ₂ O 0.9%, Fe ₂ O ₃ 0.687%, TiO ₂ 0.17%, Ce
O ₂ 0.31%, SO ₃ 0.13%, MnO 80ppm, the sum of the components is 99.905%, SiO ₂ + Al ₂ O ₃ + TiO ₂ 72.37%, Ca
The contents were O ₂ + MgO 12.0% and Na ₂ O + K ₂ O 14.4%, and the reduction rate was about 0.30 to 0.35 as described above. The optical characteristics are visible light transmittance 70.6%, solar radiation transmittance 42%, dominant wavelength 509.2n.
m 2, stimulation purity was 3.0, and the desired green color tone.

Further, as to the easy strengthening property, the above-mentioned Example 1 was used.
When the same procedure as in Example 1 was performed, it was possible to obtain a product that sufficiently satisfied the standards determined by JIS and passed the above standards even with a thin glass plate with high efficiency and high yield. It was.

Example 3 The same glass raw material as in Example 1 was used, weighed and blended,
A melting operation was performed, and the obtained glass was similarly sampled.

The sample obtained was the same as in Example 1 above.
As a result of analysis, measurement and evaluation,
Shows SiO₂69.3%, Al₂O₃1.8%, CaO 9.8%, MgO 3.3
%, Na ₂O13.4%, K₂O1.0%, Fe₂O₃0.685%, TiO₂0.12
%, CeO₂0.30%, SO₃0.15%, MnO 55ppm, composition
Is 99.919% and SiO₂＋ Al₂O₃+ TiO₂71.23
%, CaO + MgO 13.1%, Na₂O + K₂O 14.4% and return
The original rate was about 0.30 to 0.35, similar to the above. optical properties
Has visible light transmittance of 71.0%, solar radiation transmittance of 42.7%, main wave
The length is 514.9 nm, the stimulation purity is 2.8, and the desired green
It was a system color tone.

Further, as to the easy strengthening property, the above-mentioned Example 1 was used.
When the same procedure as in Example 1 was performed, it was possible to obtain a product that sufficiently satisfied the standards determined by JIS and passed the above standards even with a thin glass plate with high efficiency and high yield. It was.

Comparative Example 1 The same glass raw materials as in Example 1 were used, except that the ilmenite was not used, weighed and blended, melted, and the obtained glass was similarly sampled.

The obtained sample was the same as in Example 1 above.
As a result of analysis, measurement and evaluation,
Shows SiO₂72.1%, Al₂O₃1.5%, CaO 7.75%, MgO 3.56
%, Na ₂O12.5%, K₂O1.1%, Fe₂O₃0.753%, TiO₂0.25
%, CeO₂0.30%, SO₃0.18%, the sum of the components is 99.9
93%, SiO₂＋ Al₂O₃+ TiO₂73.85%, CaO + Mg
O11.31%, Na₂O + K₂O is 13.6% and the reduction rate is
Similarly, it was around 0.30 to 0.35. The optical characteristics are visible light transmission.
Excess ratio 68.4%, solar radiation transmittance 39.3%, dominant wavelength 510.5nm
 , The stimulation purity is 3.3, and the desired green color tone
I could not always say that.

Further, regarding the easy strengthening property, the above-mentioned Example 1 was used.
When carried out in the same manner as above, there was a difference from each of the above-mentioned examples, and it did not always satisfy the standard determined by JIS. Moreover, the efficiency and the yield have not necessarily been improved by the strengthening treatment and the like.

[0031]Comparative example 2 A glass obtained in the same manner as in Comparative Example 1 was similarly sampled.
Turned into The obtained sample was analyzed in the same manner as in Example 1 above.
As a result of the analysis, measurement and evaluation, the glass component composition is displayed in weight.
SiO₂67.0%, Al₂O₃1.7%, CaO9.45%, MgO 3.0%, Na
₂O16.1%, K₂O1.0%, Fe₂O₃0.572%, TiO₂0.73%, CeO₂
0.22%, SO₃0.22%, and the sum of the components is 99.992%.
That's SiO₂＋ Al₂O₃+ TiO₂69.43%, CaO + MgO12.45
%, Na₂O + K₂O is 17.1%, and the reduction rate slightly increases to about 0.
It was around 4. The optical characteristics are visible ray transmittance 70.9%,
Solar transmittance is 42.8%, dominant wavelength is 538.6nm, and stimulation purity is 4.
2 is not always the desired green color tone.
I could not say.

Further, as to the easy strengthening property, the above-mentioned Example 1 was used.
When carried out in the same manner as above, there was a difference from each of the above-mentioned examples, and it did not always satisfy the standard determined by JIS. Moreover, the efficiency and the yield have not necessarily been improved by the strengthening treatment and the like.

The above-mentioned embodiments are examples of the present invention, and the present invention is not limited to these embodiments.

[0034]

According to the present invention, an infrared and ultraviolet absorbing glass in which a specific oxide component is combined in a specific composition range,
Moreover, by using a combination of unique raw materials, the reduction of the reduction rate is suppressed, the absorption of infrared rays and the absorption of ultraviolet rays are well balanced, sufficient transparency is maintained, and easy strengthening is maintained, and the desired green color tone is obtained. It is possible to manufacture a glass exhibiting the above-mentioned properties without significantly changing the operating conditions of the actual kiln, and it is highly livable, safe and environmentally friendly in terms of both human and physical properties, and can be made lighter. And, of course, such as architectural window glass,
In particular, the present invention provides an infrared and ultraviolet absorbing glass which is useful when applied to a window glass for an automobile, and a method for producing the same.

Claims (3)

[Claims] 1. The following oxides are substantially represented by weight%: SiO ₂ 68-72%, Al ₂ O ₃ 1.6-3.0%, CaO 8.5
~11.0%, MgO 2.0 ~4.2%, Na 2 O12.0~16.0%, K 2 O
0.5 to 3.0%, SO ₃ 0.08 to 0.30%, Fe ₂ O ₃ 0.65 to 0.75
%, CeO ₂ 0.20 to 0.35%, TiO ₂ 0.1 to 0.2%, and at least MnO 5 to 300 ppm as a trace oxide, the sum of these components is 98% or more, and SiO ₂ + Al ₂ O ₃ +
TiO ₂ 70.0 to 74.0%, CaO + Mg0 12.0 to 15.0%, Na ₂ O + K ₂
O 13.5 to 17.0% is an infrared and ultraviolet absorbing glass. 2. The glass has a visible light transmittance of 67% or more and a solar radiation transmittance of 37 to 45 with an A light source in terms of a thickness of 5 mm.
%, UV transmittance 7-13%, dominant wavelength 506-518 nm,
The infrared-ultraviolet-absorbing glass according to claim 1, which has a stimulation purity of 3.5 or less. 3. In producing the infrared and ultraviolet absorbing glass according to claim 1 or 2, at least one of ilmenite as a raw material and / or a metal powder or oxide of carbon, Zn, Sn or the like as a trace raw material is used. A method for producing infrared-ultraviolet absorbing glass, which is characterized by being used.