GB2315487A - Ultraviolet and infra-red absorbing glass - Google Patents
Ultraviolet and infra-red absorbing glass Download PDFInfo
- Publication number
- GB2315487A GB2315487A GB9614997A GB9614997A GB2315487A GB 2315487 A GB2315487 A GB 2315487A GB 9614997 A GB9614997 A GB 9614997A GB 9614997 A GB9614997 A GB 9614997A GB 2315487 A GB2315487 A GB 2315487A
- Authority
- GB
- United Kingdom
- Prior art keywords
- composition
- glass
- ultraviolet
- less
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000011521 glass Substances 0.000 title claims abstract description 41
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 239000003086 colorant Substances 0.000 claims abstract description 5
- 239000005361 soda-lime glass Substances 0.000 claims abstract 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 14
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 229910052720 vanadium Inorganic materials 0.000 abstract description 5
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000005329 float glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
- C03C4/082—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths for infrared absorbing glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
- C03C4/085—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths for ultraviolet absorbing glass
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
An ultraviolet and infra-red absorbing soda-lime-silica glass composition comprising a base composition and a colorant portion, the colorant portion consisting of 0.7% to 1.6% (by weight) total iron calculated as Fe* small Greek eta *O* small Greek omega * and 0.02% to 0.15% V* small Greek eta *O . The ferrous state of the glass is between 15% and 35%. At a thickness of from 2mm to 5mm, glass made from such composition has a light transmission of at least 70%, a Direct Solar Heat Transmission of less than 46% and an ultraviolet transmission of less than 38%.
Description
Glass Composition
The present invention relates to flat or float glass compositions and, more particularly to glass compositions which have good solar control and ultraviolet radiation absorption properties. Solar control is a term well known in the art and is used to denote glasses having good infrared absorption properties. Glass made from the composition is primarily, but not exclusively, intended for use in vehicle glazing. The present invention also relates to glazing formed from such a composition and to laminates of such glass with suitable materials.
According to the present invention, there is provided a glass composition comprising a base composition and a colorant portion characterised in that the colorant portion comprises:
Total Iron 0.7% - 1.6% V205 O.020%-O.15%
Ferrous state 15% - 35% the total iron being measured as Fe203, the glass having, at thickness of 2 to 5 millimetres, the following optical properties:
Light Transmission greater than 70%
Direct Solar Heat Transmission less than 46%
Ultraviolet Transmission less than 38%
A suitable base composition is Sio2 65% -75% (by weight)
Na2O 10%- 18% K20 % ~ 5% MgO
CaO 4%- 14% A1203 % - 5% B203
BaO
The ferrous content of the glass is estimated from the optical density of the glass at 1000 nm and the extinction coefficient is given in the book "Colour Generation and
Control in Glass" by C. R Bamford and published by Elsevier in 1977.
The light transmission refers to the visible transmission according to the spectrum of tungsten headlights in motor vehicles which is known as "Illuminant A". Direct Solar
Heat Transmission (DSHT), which is an indicator of the solar control performance, is the direct solar heat transmitted at Air Mass 2 (simulating rays from the sun striking an object at an angle of 309 over the range 300 to 2100 nm The ultraviolet transmission is that transmitted over the range 300 nm to 400 nm according to the Parry-Moon distribution and calculated according to the rectangular rule.
The iron, although measured as Fe203, is present in the glass in both the ferrous and ferric forms. The ferrous iron is the principal infrared absorber in the glass. The ferric iron absorbs some of the ultraviolet radiation. The preferred amount of Fe203 lies within the range of 0.85% to 1.5% and the preferred ferrous state lies within the range of 20% to 30%.
Vanadium absorbs ultraviolet radiation strongly but is not used in glasses having a high iron content due to its adverse effect on the visible transmission and colour of the glass. Furthermore, vanadium is a strong oxidising agent and very careful use of reducing materials such as anthracite or a ferrouscontaining iron source is necessary to achieve the desired ferrous state (and hence the desired infrared absorption properties) in the glass.
We have discovered that very small amounts of vanadium are effective in lowering the ultraviolet radiation transmission of high ironcontent glasses to levels less than 38% whilst maintaining the visible transmission greater than 70% and the DSHT less than 46%.
As little as 0.02% V205 has a significant effect on lowering the ultraviolet radiation transmission but up to 0.15% may be used in the glasses of the present invention.
Preferably the amount of V205 lies in the range 0.02% to 01%.
Titania (tri02) can also be used to lower the ultraviolet radiation transmission of glasses. In the glasses in accordance with the present invention which are exemplified hereafter, titania is present as an impurity in the batch, typically at levels of from 0.02% to 0.06%. Greater amounts of titania may be included in the glasses of the present invention, advantageously up to about 0.5%, but titania does have a tendency to colour the glass yellow.
The yellowing effect of vanadium and titania may, if desired, be neutralised by the addition of up to 10 ppm Cho304 without lowering the visible transmission below 70%.
In a preferred embodiment, the DSHT is less than 45%. Similarly, in a desirable embodiment, the ultraviolet transmission is less than 36%.
The glass may be produced in different thicknesses. Thicker glass tends to require less iron than thinner glass to achieve the desired properties and vice versa. The following ranges of iron for different thicknesses of glass are given solely as guidelines.
5 mm thick glass 0.7% - 0.9% Fe203 4 mm thick glass 0.7% - 1.0% Fe203 3 mm thick glass 1.0% - 1.3% Fe203 2 mm thick glass 1.3% - 1.5% Fe203
The invention will be further described by way of illustration only, with reference to the following non-limitative Examples, in which the amounts of Fe2O3 and V205 are given as percentages by weight and the ferrous state, the visible light transmission (LTA), the
DSHT and the ultraviolet transmission are expressed as percentages. The a* and b* values given are the colour coordinates of the glass according to the CieLAB System
EXAMPLES 1 2 3 4 5 6 7 8 . 9 0.72 0.8 0.85 0.9 1.05 1.3 1.5 1.5 0.7 Ferrous state 32 28.5 25.5 24.5 19 20.5 28 j 25 25.5 V2Os 0.12 0.1 0.1 0.025 0.05 0.025 0.05 0.15 0.075 TiO2 trace trace trace trace trace trace t trace trace trace Thickness 4mm 4mm 4mm 4mm 4mm 3mm 2mm 2mm 5mm LTA 70.2 70.7 70.1 71.7 70.0 70.1 70.4 70.0 71.2 DSHT 44.6 44.6 44.9 44.5 46.0 44.9 44.9 45.8 44.4 UV (Parry- 34 32.0 30.5 36.5 30.2 30.5 34.7 29.5 33.5 Moon) a* -9.3 -9.4 -9.5 -9.0 -9.1 -8.5 -8.4 -9.0 -9.5 b +5.8 +3.8 +4.5 + 1.9 +4.9 +4.5 +3.5 +8.0 +2.7 Such glasses may also be formed into a laminated structure with other suitable materials such as clear glass.
Claims (13)
1. An ultraviolet and infrared absorbing soda lime silica glass composition comprising
a base composition and colourant portion, characterised in that the colorant portion
consists of:
Total iron (measured as Fe203) 0.7% -1.6% V2o5 0.02% - 0.15%
Ferrous state 15%-35% the glass having, at a thickness of 2 to 5 millimetres, a light transmission of at least 70%, a Direct Solar Heat Transmission (DSHI ) of less than 46% and an ultraviolet radiation transmission of less than 38%.
2. A composition as claimed in Qaim 1 wherein the composition additionally includes
up to 10 ppm Co304 for colour correction purposes.
3. A composition as claimed in Claim 1 or Claim 2 wherein the V2Os content lies
within the range from 0.02% to 0. 1%.
4. A composition as claimed in any preceding claim additionally containing TiO2 in an
amount of up to 0.5% by weight.
5. A composition as claimed in any preceding claim in which 20% to 30% of the iron is
in the ferrous state.
6. A composition as claimed in any preceding claim wherein the glass produced has a
thickness of 4 mm to 5 mm and contains from 0.7% to 1.0% FezO3.
7. A composition as claimed in any one of claims 1 to 5 wherein the glass produced
has a thickness of 2 mm to 3 mm and contains from 1.0% to 1.5% Fez03.
8. A composition as claimed in any preceding claim in which the glass has a DSHT
value of less than 45%.
9. A composition as claimed in any preceding claim in which the glass has an
ultraviolet transmission value of less than 36%.
10. A composition as claimed in Claim 1 substantially as hereinbefore described with
reference to the foregoing Examples.
11. Glazing whenever produced from a composition as claimed in any one of Claims 1
to 10.
12. A laminated structure comprising glazing as claimed in Claim 11 laminated with any
other suitable material.
13. A laminated structure as claimed in claim 12 wherein the suitable material is clear
glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9614997A GB2315487A (en) | 1996-06-17 | 1996-06-17 | Ultraviolet and infra-red absorbing glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9614997A GB2315487A (en) | 1996-06-17 | 1996-06-17 | Ultraviolet and infra-red absorbing glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9614997D0 GB9614997D0 (en) | 1996-09-04 |
| GB2315487A true GB2315487A (en) | 1998-02-04 |
Family
ID=10797057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9614997A Withdrawn GB2315487A (en) | 1996-06-17 | 1996-06-17 | Ultraviolet and infra-red absorbing glass |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2315487A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2337516A (en) * | 1998-05-20 | 1999-11-24 | Pilkington Plc | Glass composition for absorbing uv and ir |
| WO2000001633A1 (en) * | 1998-06-30 | 2000-01-13 | Glaverbel | Green soda glass |
| WO2000029344A1 (en) * | 1998-11-18 | 2000-05-25 | Pilkington Plc | Glass composition |
| WO2001098221A1 (en) * | 2000-06-19 | 2001-12-27 | Glaverbel | Coloured soda-lime glass |
| WO2003078778A1 (en) * | 2002-03-20 | 2003-09-25 | Granqvist Claes-Goeran | Pollutant decomposition device |
| US9079794B2 (en) | 2009-12-17 | 2015-07-14 | Pilkington Group Limited | Soda lime silica glass composition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5385872A (en) * | 1990-07-30 | 1995-01-31 | Ppg Industries, Inc. | Ultraviolet absorbing green tinted glass |
| WO1997021635A1 (en) * | 1995-12-11 | 1997-06-19 | Libbey-Owens-Ford Co. | Neutral colored glass compositions |
-
1996
- 1996-06-17 GB GB9614997A patent/GB2315487A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5385872A (en) * | 1990-07-30 | 1995-01-31 | Ppg Industries, Inc. | Ultraviolet absorbing green tinted glass |
| WO1997021635A1 (en) * | 1995-12-11 | 1997-06-19 | Libbey-Owens-Ford Co. | Neutral colored glass compositions |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2337516A (en) * | 1998-05-20 | 1999-11-24 | Pilkington Plc | Glass composition for absorbing uv and ir |
| WO2000001633A1 (en) * | 1998-06-30 | 2000-01-13 | Glaverbel | Green soda glass |
| BE1012997A5 (en) * | 1998-06-30 | 2001-07-03 | Glaverbel | Soda-lime green glass. |
| WO2000029344A1 (en) * | 1998-11-18 | 2000-05-25 | Pilkington Plc | Glass composition |
| AU760329B2 (en) * | 1998-11-18 | 2003-05-15 | Pilkington Plc | Glass composition |
| WO2001098221A1 (en) * | 2000-06-19 | 2001-12-27 | Glaverbel | Coloured soda-lime glass |
| US7304009B2 (en) | 2000-06-19 | 2007-12-04 | Glaverbel | Coloured soda-lime glass |
| WO2003078778A1 (en) * | 2002-03-20 | 2003-09-25 | Granqvist Claes-Goeran | Pollutant decomposition device |
| US7731915B2 (en) | 2002-03-20 | 2010-06-08 | Chromogenics Ab | Pollutant decomposition device |
| US9079794B2 (en) | 2009-12-17 | 2015-07-14 | Pilkington Group Limited | Soda lime silica glass composition |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9614997D0 (en) | 1996-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1067098B1 (en) | Soda-lime-silica float glass batch mixture | |
| CN1043751C (en) | Glass compositions intended for the production of panes | |
| JP6989644B2 (en) | Glass composition, glass plate and glass window for vehicles using the glass plate | |
| CA2029987C (en) | Infrared and ultraviolet radiation absorbing green glass composition | |
| JP3965461B2 (en) | Glass plate for window glass manufacturing | |
| JP4169394B2 (en) | Dark green soda lime glass | |
| JP5935445B2 (en) | UV infrared absorbing glass | |
| JP5086541B2 (en) | Near-infrared absorbing green glass composition and laminated glass using the same | |
| WO2011152257A1 (en) | Glass with low solar transmittance | |
| US5763342A (en) | Ultraviolet ray absorbing colored glass | |
| EP0811581B1 (en) | Infrared radiation absorbing glass | |
| JP6826112B2 (en) | UV-shielding glass plate and glass windows for vehicles using the glass plate | |
| US20020025899A1 (en) | Glass compositions | |
| EP3360853A2 (en) | Composition of green uv-absorbent glass for solar control | |
| AU760329B2 (en) | Glass composition | |
| GB2315487A (en) | Ultraviolet and infra-red absorbing glass | |
| JPH07109147A (en) | Uv light-absorbing gray glass | |
| JPS61136936A (en) | Glass composition | |
| JPH05270855A (en) | Heat ray absorbing glass having neutral gray tone | |
| GB2315265A (en) | Infra-red and ultraviolet absorbing glass containing iron | |
| JP2002293568A (en) | Ultraviolet ray and infrared ray absorbing glass | |
| EP0864545A1 (en) | Solar control glass and glazings | |
| JP7127654B2 (en) | glass plate | |
| US20200180997A1 (en) | Solar Control Thin Green Glass Composition | |
| AU715351B2 (en) | Glass compositions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |