JP2002293568A - Ultraviolet ray and infrared ray absorbing glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ultraviolet ray (UV) and infrared ray (IR) absorbing glass with high transmittance for a visible ray, high shielding performance for UV and solar radiation, having a gray tone visible without fatigue. SOLUTION: The UV and IR absorbing glass having the gray tone is soda- lime silica based glass contains in wt.%, as UV and IR and color tone controlling ingredient, Fe2 O3 (all iron) of 0.3-0.7, CeO2 of 1.5-2.5, Er2 O3 and/or Nd2 O3 of 0.2-2.5, TiO2 of 0-1.0, CoO of 0-0.005, and an ion ratio of Fe<2+> /Fe<3+> is 0.20-0.90.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultraviolet / infrared absorbing glass which can be suitably used as a window material for transporting / transporting equipment such as buildings and structures, vehicles, ships, and airplanes.

[0002]

2. Description of the Related Art In the prior art,
For example, JP-A-4-193738, JP-A-4-310539, JP-A-6-56466, JP-A-9-48635, JP-A-9-59036
Each publication discloses Fe ₂ O ₃ (Fe
O), a glass containing CeO ₂ and / or TiO ₂ is disclosed, but it is difficult to finely adjust the color tone only by this.

Further, Japanese Patent Application Laid-Open Nos. Hei 6-40741 and Hei 9-278 are disclosed.
No. 481, JP-A-10-72239, each of the above-mentioned components, a glass containing at least Se as essential is disclosed, in recent years, the harmfulness of Se, environmental pollution has been regarded as a problem, Se content should be avoided.

JP-A-5-97469 discloses Fe ₂ O ₃ (Fe
O), CeO ₂ , and Se include, as essential components, Er ₂ O ₃ listed as a selective wavelength absorption and color tone adjusting component together with Se. However, Se is included in the human body, organisms, and the environment as described above. Should not be.

It is an object of the present invention to provide an ultraviolet-ray and infrared-absorbing glass which is easy to adjust the color tone and does not contain harmful components such as Se and exhibits a gray color tone, unlike the prior art.

[0006]

The present invention SUMMARY OF THE INVENTION may, in soda-lime-silica based glass in wt% as ultraviolet and infrared radiation absorbing and color-tone adjustment component, Fe ₂ O ₃ (total iron) 0.3~0.7, CeO ₂ 1.5~2.
5, Er ₂ O ₃ and / or _{Nd 2 O 3 0.2~2.5, TiO 2} 0~1.
0, including CoO 0-0.005, Fe ²⁺ / Fe ³⁺ ion ratio 0.20-
It is an ultraviolet and infrared absorbing glass exhibiting a gray color tone of 0.90.

In the above description, the optical characteristics at a glass thickness of 5 mm are determined by the UV transmittance according to the ISO 9050 measurement standard.
5% or less, solar transmittance 60% or less, visible light transmittance 65% or more.

Further, it is preferable that the stimulus purity is 10 or less.

In addition, the difference between visible light transmittance and solar radiation transmittance is
It is preferably at least 15%.

[0010]

DETAILED DESCRIPTION OF THE INVENTION Soda-lime silica according to the present invention
The main component of the system glass is SiO_Two68-73wt%, Al _TwoO_Three0-3
wt%, MgO 0-5 wt%, CaO 5-12 wt%, Na_TwoO 10 ~
15wt%, K_TwoO0-3wt%, so-called ordinary soda
It is in the same range as lime-silica glass.
Meltability, moldability, mass productivity, water resistance and weather resistance of glass products, etc.
It is excellent overall.

The present invention provides a soda-lime-silica glass,
By including an ultraviolet ray infrared absorbing component and a color tone adjusting component, the optical characteristics at a glass thickness of 5 mm can be adjusted to IS
According to the measurement standard of O9050, the UV transmittance should be 15% or less, the solar transmittance should be 60% or less, and the visible light transmittance should be 65% or more.

The visible light transmittance at a glass thickness of 5 mm is 65.
% Or more, for example, when used for windshields of automobiles, the actual thickness (usually 3 to 4 mm) is taken into consideration, or by using laminated glass with clear glass, visible light exceeding 70% that is regulated Light transmittance can be obtained. Also, as a window glass for architectural use, when the glass thickness is 3 to 4 mm, as well as in the glass thickness of 10 to 15 mm, there is no obstacle in seeing the other side from the one side through the glass, and privacy. In addition, by exhibiting a gray-based color tone, it is possible to minimize a sense of discomfort with the surrounding environment without causing visual fatigue.

By setting the solar radiation transmittance to 60% or less, heat rays in solar radiation and the like can be cut off as much as possible, and for example, the cooling load in summer can be effectively reduced. Preferably, the difference between visible light transmittance and solar radiation transmittance is 15% or more.

In addition, by setting the ultraviolet transmittance to 15% or less, the influence of ultraviolet rays on the human body and fading of various organic coloring materials can be suppressed as much as possible.

The stimulus purity is preferably within 10%, so that the gray color tone can be made closer to a neutral color.

In the present invention, a soda-lime-silica glass is provided with an ultraviolet-ray-infrared absorbing component and a color tone adjusting component.
The desired optical characteristics are obtained by equilibrium inclusion in the following ranges.

Fe ₂ O ₃ (total iron, that is, including Fe ₂ O ₃ and FeO) is in the range of 0.3 to 0.7 wt%, and Fe ³⁺ and Fe ^3+
Reduces UV and infrared transmittance by ²⁺ . 0.3wt
%, The above-mentioned effect, particularly the effect of blocking infrared rays, cannot be exerted. If it exceeds 0.7% by weight, the visible light transmittance is excessively reduced, and visibility is impaired. The iron ion ratio (Fe ²⁺ / Fe ³⁺ )
0.20 to 0.90 [i.e., from 0.17 to 0.47 in the ^{Fe 2+ / (Fe 2+ + Fe} 3+) ion ratios] intended to be, Fe ²⁺ / Fe ³⁺ 0.20
If it is less than 0.90, sufficient infrared shielding performance cannot be exhibited, and if it exceeds 0.90, it becomes difficult to obtain a desired color tone, and the visible light transmittance is reduced. For example, the presence of a small amount of S originating from a glass material or petroleum fuel tends to exhibit an amber color due to interaction with Fe ²⁺ . Incidentally, the limitation of each of the above ranges is not limited to other additional components in the present invention, that is, CeO ₂ or further.
In addition to TiO ₂ component, Er ₂ O ₃ and / or Nd ₂ O ₃ component, CoO
Needless to say, the effects of the components are taken into account.

It is difficult for Fe ³⁺ alone to effectively block ultraviolet rays. On the other hand, CeO ₂ has strong ultraviolet blocking and absorbing performance. CeO ₂ is 1.5-2.5wt in glass
If the content is less than 1.5% by weight, the above effect is insufficient. If the content exceeds 2.5% by weight, the light absorption extends not only to the ultraviolet region but also to the low wavelength side of the visible region, and the glass becomes band-like. It becomes yellowish. TiO ₂ also has UV blocking and absorption performance similar to CeO ₂ , and is contained in the glass as appropriate in the range of 0 to 1.0 wt% as necessary to supplement the UV blocking and absorption performance of CeO ₂ Let it. In addition, 1.0wt%
When the ratio exceeds, it is unfavorable because it still exhibits a yellow color tone.

Er ₂ O ₃ and / or Nd ₂ O ₃ have a plurality of light absorption peaks in a visible range or an infrared range. In particular, due to light absorption near 500 nm in the visible range, light of each wavelength in the visible range is obtained. It has the function of making the transmittance uniform and making the glass have a gray color tone, and is contained in the glass in the range of 0.2 to 2.5 wt%. If it is less than 0.2 wt%, its effect is small, and if it exceeds 2.5 wt%, the light absorption around 500 nm becomes excessive, resulting in a decrease in visible light transmittance and a change in glass color tone.

CoO has a visible range of 550 to 650 nm in its simplest form.
It has near light absorption and gives the glass a bluish hue,
Depending on the content of each of the above-mentioned ultraviolet and infrared absorbing components and the color tone adjusting component, it is difficult to make the light transmittance uniform over the entire visible region, so that the light transmittance of each wavelength in the visible region is made uniform. Then, if necessary in the glass,
It is appropriately contained in the range of 0 to 0.005 wt%.

In addition, Na as a fining agent_TwoSO_Four, CaSO_FourEtc.
Sulfate acts as an oxidizing agent and decomposes the sulfate.
Steel slag (especially blast furnace slag) as a promoter, carbohydrate
Have the action of reducing agents,
The amount is the iron ion ratio (Fe²⁺/ Fe ³⁺Affects, but iron
Ratio should be within the above-mentioned appropriate range, that is, 0.20 to 0.90.
In addition, the amount of addition and introduction may be determined, and
It is a matter to gain.

According to the present invention, in the case of a thin glass sheet having a thickness of about 3 mm to a thick glass sheet exceeding 10 mm, a half-strengthened or reinforced one as a flat plate or a bent plate can be easily produced from a raw plate. It can be suitably used as a sheet glass, a laminated glass, a double-layered glass, etc., as a window material for buildings and structures, and a window material for transportation equipment such as vehicles, airplanes and ships.

[0023]

EXAMPLES Examples of the present invention will be described below in comparison with comparative examples.

As a basic component composition, SiO ₂ 72, A
l ₂ O ₃ 2, MgO 4, CaO 8, Na ₂ O 13, K ₂ O 1, total 100wt
%, And high-purity silica sand, aluminum oxide, sodium carbonate (Na ₂ O due to sodium sulfate
₂ O composition), calcium carbonate and magnesium carbonate were adopted and mixed and adjusted. A desired amount of Fe ₂ O ₃ (FeO) as each ultraviolet and infrared absorbing component and color tone adjusting component,
In order to contain CeO ₂ , TiO ₂ , Er ₂ O ₃ , Nd ₂ O ₃ , CoO, bengara, cerium oxide, titanium oxide, erbium oxide,
Neodymium oxide and cobalt oxide were introduced at desired ratios, added to the above basic component materials, and mixed and prepared.

[0025] Glauber's salt and carbon were added to the raw materials as a fining agent and a decomposition accelerator, respectively, and were appropriately mixed. Glauber's salt was introduced as Na ₂ SO _{4 in} a range of 1% by weight or less based on 100% by weight of glass, and carbon was introduced based on the theoretical amount required for reaction and decomposition with Glauber's salt.

A mixture of the raw materials in a desired ratio is placed in a platinum crucible, melted and vitrified in an electric furnace maintained at a temperature of about 1470 ° C. for about 4 hours. Into a plate-like glass, which was further cooled slowly, and the surface was polished to obtain each measurement sample.

The spectral transmittance of each sample was measured by a spectrophotometer, and the optical characteristics (at a thickness of 5 mm) of the ultraviolet light transmittance (%), visible light transmittance (%), and solar transmittance (%) of the D light source were measured. ), And stimulation purity (%) were determined. They are based on the ISO 9050 measurement standard.

The results are shown in Table 1. The compositions of the ultraviolet and infrared absorbing components and the color tone adjusting component are the contents (wt%) in 100 wt% of the glass.

As shown in Table 1, in this embodiment,
Optical properties such as UV transmittance, visible light transmittance, solar transmittance, stimulus purity, etc. are within the expected range, have relatively high visible light transmittance, high UV and solar radiation shielding performance, Gives a gray coloring that does not cause fatigue
It can be suitably used as a window material for buildings and structures, and a window material for vehicles such as vehicles, airplanes and ships.

On the other hand, the comparative examples fall outside the ranges of the ultraviolet and infrared absorbing components and the color tone adjusting components in the present invention, so that desired optical characteristics cannot be obtained.

[0031]

[Table 1]

[0032]

The glass of the present invention is a gray glass having a relatively high visible light transmittance, a high ability to block ultraviolet rays and solar radiation, and not giving a sense of visual fatigue. It can be suitably used as a material, window material for transportation equipment such as vehicles, airplanes and ships.

Continued on the front page F term (reference) 4G062 AA01 BB03 CC01 DA06 DA07 DB01 DB02 DB03 EB04 EC01 EC02 EC03 ED01 ED02 ED03 EE03 EE04 FB01 FB02 FL03 HH11 HH12 KK02 KK06 MM01 NN12 NN13

Claims (4)

[Claims] 1. A soda-lime-silica glass containing 0.3% to 0.7% Fe ₂ O ₃ (total iron), 1.5% to 2.5% CeO ₂ , Er ₂ O ₃ and / or Nd in wt% as an ultraviolet and infrared absorption and color tone adjusting component.
Including ₂ O ₃ 0.2-2.5, TiO ₂ 0-1.0, CoO 0-0.005, F
An ultraviolet / infrared absorbing glass exhibiting a gray color tone characterized by an e ²⁺ / Fe ³⁺ ion ratio of 0.20 to 0.90. 2. The optical characteristic at a glass thickness of 5 mm is I
2. The ultraviolet and infrared ray absorbing glass according to claim 1, wherein the ultraviolet ray transmittance is 15% or less, the solar ray transmittance is 60% or less, and the visible light transmittance is 65% or more according to the measurement standard of SO9050. 3. The ultraviolet / infrared absorbing glass according to claim 1, wherein the stimulus purity is 10 or less. 4. The ultraviolet and infrared absorbing glass according to claim 1, wherein the difference between visible light transmittance and solar light transmittance is 15% or more.