Low-luminous-transmittance glass

a technology of luminous transmittance and sodalime, which is applied in the field of sodalime type glass with low luminous transmittance, can solve the problems that the influence of inevitable impurities on the properties of glasses concerned is still very limited, and achieves the effect of increasing the selectivity of glass and reducing

Inactive Publication Date: 2010-07-13
AGC GLASS EUROPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes how iron works well at absorbing infrared rays while also making glass more transparent with fewer than half of its own weight. Iron plays a role similar to other elements like selenium or sulfur in sunlight filters.

Problems solved by technology

The technical problem addressed in this patent is how to create a glazite material that meets certain criteria for achieving high light absorption while maintaining other important qualities like color quality and reflectivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041]The present invention will be illustrated by the following specific examples of optical properties and compositions.

[0042]

12345678910Fe2O3 (%)1.11.151.2321.2381.2731.2731.2851.291.2961.31Co (ppm)175185181178184184176195185150Cr2O3 (ppm)100253162405265604230Se (ppm)30354736403531434730FeO (%)0.2480.2590.2120.2610.2860.2680.2800.2900.2220.295Fe2+ / TotFe (%)252519.123.42523.424.2251925X0.2980.3020.3160.3100.3120.3050.3030.3130.3040.310Y0.3130.3130.3260.3250.3260.3210.3210.3270.3160.328TLA 4 mm (%)19.0017.6017.6017.7014.9616.8017.4012.8117.0020.00TE 4 mm (%)18.9017.8519.9017.3015.0416.6016.6013.8419.3016.90LOD (nm)487.8485.5570.0547.1561.1504.6498.4563.5489.8550.8P (%)4.83.34.12.13.21.62.43.82.33.3111213141516171819Fe2O3 (%)1.351.351.351.351.351.351.351.351.35Co (ppm)200200200165180150155200200Cr2O3 (ppm)252525305080100100100Se (ppm)353535253530213535FeO (%)0.2920.2550.3040.3040.279450.3040.3040.2550.304Fe2+ / TotFe (%)242125252325252125x0.3020.3060.3000.2980.3100.3110.2960.3060.301

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PUM

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Abstract

The glass according to the invention has a soda-lime type composition to which are added colouring elements present in the following proportions by weight:

Fe2O3
1.1 to 1.5% (total iron in the composition)
Co
150 to 200 ppm
Cr2O3
25 to 100 ppm
Se
10 to 50 ppm
MnO
less than 600 ppm
TiO2
less than 0.1%
    • the constituents of the composition, especially the coloured elements, being selected in such proportions that the luminous transmittance at a thickness of 4 mm, TLA4, is less than 20%, and the energetic transmittance, TE4 (Moon), is less than 20%.

Description

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Claims

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Application Information

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Owner AGC GLASS EUROPE
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