Low iron high transmission glass with boron oxide for improved optics, durability and refining, and corresponding method

a transmission glass and high-efficiency technology, applied in the field of glass compositions, can solve the problems of increasing production costs, reducing thermal efficiency, and not providing, and achieve the effect of improving optical performance and durability

Inactive Publication Date: 2010-10-07
PHOENICIA AMERICA ISRAEL FLAT GLASS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0001]This invention relates to a high transmission low iron (total iron no greater than about 0.04%) glass that includes boron oxide. The boron oxide has the unexpected and surprising effect in low-iron high transmission glass of improving total solar transmission. Moreover, the boron oxide also improves glass refining, homogeneity and quality (lower seed count) through its flux action and improves glass optical parameters of green and clear glass through the change in refractive index and surface tension. Boron oxide lends to broader and weaker absorption band of such transition element(s) as iron which additionally improves the transmittance of low iron clear glass in certain example embodiments of this invention. In certain example embodiments, the addition of boron oxide in certain quantities in advantageous in that it improves the chemical durability of the glass by decreasing the USPX (or USPXIII) value of the glass via suppression of the silica, sodium ions in the glass structure.

Problems solved by technology

There is a tradeoff between glass production and the cost of manufacture.
However, as more glass batch is processed, more fuel is required to melt the increased amounts of glass batch thereby increasing production costs and decreasing thermal efficiency.
However, these compositions are problematic for numerous reasons and do not provide for the best results.

Method used

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  • Low iron high transmission glass with boron oxide for improved optics, durability and refining, and corresponding method
  • Low iron high transmission glass with boron oxide for improved optics, durability and refining, and corresponding method
  • Low iron high transmission glass with boron oxide for improved optics, durability and refining, and corresponding method

Examples

Experimental program
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Effect test

examples 1-3

[0028]Example glasses were made according to example embodiments of this invention. Glasses of this invention may be made from batch ingredients using well known glass melting and refining techniques, unless otherwise indicated. The compositions of the glasses according to the examples are set forth in FIGS. 1-2. All amounts of ingredients are in terms of weight percentage. In particular, in FIGS. 1-2 the glasses at DOE 1-6, 1-7, 1-8, and 1-9 represent Examples 1, 2 and 3 of this invention, respectively; whereas the other glasses in FIGS. 1-2 represent comparative examples.

[0029]FIG. 1 sets forth the glass melt descriptions of the various glasses including the make-up (constant glass yield=100 g per melt) of the glass melt and the USPX value of each glass. Meanwhile, FIG. 2 illustrates the measured XRF results matrix for each of the glasses made in accordance with FIG. 1. Boron oxide was added in Examples 1-3, but was not present in the comparative examples in FIGS. 1-2. It can be s...

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Abstract

This invention relates to a high transmission low iron glass that includes boron oxide. The boron oxide, added to this low iron glass, has the effect of improving glass refining, homogeneity and quality (lower seed count) through its flux action and improves glass optical parameters of green and clear glass through the change in refractive index and surface tension. Boron oxide lends to broader and weaker absorption band of such transition element(s) as iron which additionally improves the transmittance of low iron clear glass in certain example embodiments of this invention. In certain example embodiments, the addition of boron oxide in certain quantities in advantageous in that it improves the chemical durability of the glass by decreasing the USPX (or USPXIII) value of the glass via suppression of the silica, sodium ions in the glass structure.

Description

[0001]This invention relates to a high transmission low iron (total iron no greater than about 0.04%) glass that includes boron oxide. The boron oxide has the unexpected and surprising effect in low-iron high transmission glass of improving total solar transmission. Moreover, the boron oxide also improves glass refining, homogeneity and quality (lower seed count) through its flux action and improves glass optical parameters of green and clear glass through the change in refractive index and surface tension. Boron oxide lends to broader and weaker absorption band of such transition element(s) as iron which additionally improves the transmittance of low iron clear glass in certain example embodiments of this invention. In certain example embodiments, the addition of boron oxide in certain quantities in advantageous in that it improves the chemical durability of the glass by decreasing the USPX (or USPXIII) value of the glass via suppression of the silica, sodium ions in the glass stru...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C03C3/089C03C3/095
CPCC03C3/091C03C1/00C03C3/087C03C4/0092
Inventor FULTON, KEVIN R.MICHAELIS, ABRAHAM W.RESCH, MARIOBIRD, DAVIDHULME, RICHARDTHOMSEN, SCOTT V.
Owner PHOENICIA AMERICA ISRAEL FLAT GLASS
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