Clear glass composition with high visible transmittance
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C03C-003/095
C03C-003/076
C03C-003/087
출원번호
US-0336859
(2003-01-06)
발명자
/ 주소
Landa,Ksenia A.
Landa,Leonid
Hulme,Richard
Thomsen,Scott V.
출원인 / 주소
Guardian Industries Corp.
대리인 / 주소
Nixon &
인용정보
피인용 횟수 :
22인용 특허 :
18
초록▼
A high transmittance fairly clear/neutral colored glass composition is provided. An oxidizing agent(s) such as cerium oxide (e.g., CeO2) or the like is added to the glass batch in order to realize very oxidized conditions (i.e., to significantly lower the redox of the resulting glass). As a result o
A high transmittance fairly clear/neutral colored glass composition is provided. An oxidizing agent(s) such as cerium oxide (e.g., CeO2) or the like is added to the glass batch in order to realize very oxidized conditions (i.e., to significantly lower the redox of the resulting glass). As a result of the oxidizing agent(s) used in the batch, the iron is oxidized to a very low FeO (ferrous state) content. For example, this may result in a glass having a glass redox value of no greater than 0.12 (more preferably <=0.10; even more preferably <=0. 08; and most preferably <=0.05) and a % FeO (i.e., ferrous content) of from 0.0001 to 0.05%. In certain example embodiments, in order to compensate for yellow or yellow-green coloration a small amount of cobalt (Co) may be provided in the glass to enable it to realize a more neutral color.
대표청구항▼
The invention claimed is: 1. A glass comprising: a base glass portion comprising (by weight percentage) : SiO2 67 to 75% Na2O 10 to 20% CaO 5 to 15% MgO 0 to 8% Al2O3 0 to 5% K2O 0 to 5% a colorant portion comprising (by weight percentage):
The invention claimed is: 1. A glass comprising: a base glass portion comprising (by weight percentage) : SiO2 67 to 75% Na2O 10 to 20% CaO 5 to 15% MgO 0 to 8% Al2O3 0 to 5% K2O 0 to 5% a colorant portion comprising (by weight percentage): total iron (expressed Fe2O3): 0.04 to 0.10% cobalt oxide: 0.1 to 15 ppm glass redox: <=0.10 wherein the glass has a visible transmission of at least 90%, and has a* and b* color values from-0.5 to +0.5, and wherein the glass includes one of 0.07%, 0.06% or 0% cerium oxide. 2. The glass of claim 1, wherein the colorant portion comprises: cobalt oxide: 0.3 to 10 ppm glass redox: <=0.08. 3. The glass of claim 1, wherein the colorant portion comprises: cobalt oxide: 0.5 to 5 ppm glass redox: <=0.08 % FeO: 0.0001 to 0.008%. 4. The glass of claim 1, wherein the colorant portion comprises: cobalt oxide: 0.3 to 5 ppm glass redox: <=0.05. 5. The glass of claim 1, wherein the glass has a UV % transmission no greater than about 75%. 6. The glass of claim 1, wherein the glass has a UV % transmission no greater than about 72%. 7. A glass comprising: a base glass portion comprising (by weight percentage) : SiO2 67 to 75% Na2O 10 to 20% CaO 5 to 15% MgO 0 to 8% Al2O3 0 to 5% K2O 0 to 5% a colorant portion consisting essentially of (by weight percentage): total iron (expressed Fe2O3): 0.04 to 0.10% cobalt oxide: 0.1 to 15 ppm wherein the glass has a visible transmission of at least about 85%, a glass redox of no greater than 0.10, is colored so as to have a* and b* values from-0.5 to +0.5, and wherein the glass includes 0. 07%, 0.06% or 0% cerium oxide. 8. The glass of claim 7, wherein the glass has a UV % transmission of no greater than about 75%. 9. The glass of claim 7, wherein the glass has a glass redox of no greater than 0.08. 10. The glass of claim 7, wherein the glass has a glass redox of no greater than 0.08 and a % FeO of from 0.0001 to 0.008%. 11. A glass comprising (by weight percentage): total iron (expressed Fe2O3): 0.04 to 0.10% cobalt oxide: 0.1 to 15 ppm glass redox: <=0.12 wherein the glass has a visible transmission of at least about 90%, has a* and b* values from-0.5 to +0.5, and wherein the glass includes 0.07%, 0.06% or 0% cerium oxide. 12. The glass of claim 11, further comprising: cobalt oxide: 0.3 to 10 ppm glass redox: <=0.08. 13. A glass comprising a base portion, and a colorant portion consisting essentially of (by weight percentage): total iron (expressed Fe2O3): 0.04 to 0.10% cobalt oxide: 0.1 to 15 ppm wherein the glass has a visible transmission of at least about 90%, a glass redox of no greater than 0.12, has a* and b* values from-0.5 to +0.5, and wherein the glass includes 0.07%, 0.06% or 0% cerium oxide. 14. The glass of claim 13, wherein the glass has a UV % transmission of no greater than about 75%. 15. The glass of claim 11, wherein the glass is substantially free of each of Cr, Se, Er and Ni. 16. The glass of claim 11, wherein the glass is substantially free of at least two of Cr, Se, Er and Ni.
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