IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0793368
(2001-02-26)
|
발명자
/ 주소 |
- Borrelli, Nicholas F.
- Cornelius, Lauren K.
- Smith, Dennis W.
- Tick, Paul A.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
▼
Materials, both glass and glass-ceramic, that exhibit UV-induced changes in light transmission and electrical conductivity behavior. The materials consist essentially, in mole %, of 20-40% SiO 2 , 10-20% AlO 1.5 , 35-55% SiO 2 +AlO 1.5 , at least 30% CdF 2 , 0-20% PbF 2 , and/or ZnF 2 , 0-15%
Materials, both glass and glass-ceramic, that exhibit UV-induced changes in light transmission and electrical conductivity behavior. The materials consist essentially, in mole %, of 20-40% SiO 2 , 10-20% AlO 1.5 , 35-55% SiO 2 +AlO 1.5 , at least 30% CdF 2 , 0-20% PbF 2 , and/or ZnF 2 , 0-15% rare earth metal fluoride, and 45-65% total metal fluorides.
대표청구항
▼
1. A material that undergoes a decrease in light transmission when exposed to UV-radiation in either the glass or glass-ceramic state, that is thermally bleachable after darkening, and that consists essentially of an alumino-silicate based glass containing CdF 2 . 2. A material in accordance with c
1. A material that undergoes a decrease in light transmission when exposed to UV-radiation in either the glass or glass-ceramic state, that is thermally bleachable after darkening, and that consists essentially of an alumino-silicate based glass containing CdF 2 . 2. A material in accordance with claim 1 in which the composition consists essentially of, as calculated from the batch, 20-40 mole % SiO 2 , 10-20 mole % AlO 1.5 , 33-55 mole % SiO 2 +AlO 1.5 , at least 30 mole % CdF 2 , 0-20 mole % of zinc and/or lead fluoride and 0-15 mole % of a rare earth metal fluoride, the total metal fluoride being 45-65 mole %. 3. A material in accordance with claim 2, in which the composition additionally contains up to 15 mole % PbF 2 . 4. A material in accordance with claim 2 wherein the composition additionally contains up to 15 mole % zinc fluoride. 5. A material in accordance with claim 2 wherein the composition contains at least 2 mole % of at least one rare earth metal fluoride selected from the group consisting of gadolinium, yttrium, ytterbium and lutetium fluorides. 6. A material in accordance with claim 2 wherein the CdF 2 is at least about 35 mole % in the absence of zinc and/or lead fluoride. 7. A material in accordance with claim 1, optionally containing Pb and/or Zn and/or rare earth metal fluorides in its composition. 8. A material according to claim 1, wherein said CdF 2 is present in an amount of at least 30 mole %. 9. A material according to claim 1, wherein said material has increased conductivity in the reduced light transmission state. 10. A glass or glass-ceramic article which exhibits UV-induced, light transmission and electrical conductivity behavior, the article having a composition consisting essentially of silica, alumina, and cadmium fluoride. 11. An article in accordance with claim 10, the article having a composition including at least 2 mole % of at least one fluoride selected from the group consisting of gadolinium, ytterbium, yttrium and lutetium fluorides. 12. An article in accordance with claim 10 wherein the composition contains up to 20 mole % of PbF 2 and/or ZnF 2 . 13. An article in accordance with claim 10 in which the composition consists essentially of, as calculated from the batch, 20-40 mole % SiO 2 , 10-20 mole % AlO 1.5 , 33-55 mole % SiO 2 +AlO 1.5 , at least 30 mole % CdF 2 , 0-20 mole % of zinc and/or lead fluoride and 0-15 mole % of a rare earth metal fluoride, the total metal fluoride being 45-65 mole %. 14. An article in accordance with claim 13 wherein the CdF 2 is at least about 35 mole % in the absence of zinc and/or lead fluoride. 15. An article in accordance with claim 10, the article having a composition that additionally contains up to 15 mole % PbF 2 .
※ AI-Helper는 부적절한 답변을 할 수 있습니다.