US 11,858,846 B2
Glass with high refractive index for fiber optic imaging element with medium-expansion and fabrication method therefor
Lei Zhang, Beijing (CN); Zhenbo Cao, Beijing (CN); Jinsheng Jia, Beijing (CN); Yun Wang, Beijing (CN); Yue Zhao, Beijing (CN); Xian Zhang, Beijing (CN); Xiaofeng Tang, Beijing (CN); Yu Shi, Beijing (CN); Jing Zhang, Beijing (CN); Zhiheng Fan, Beijing (CN); Huichao Xu, Beijing (CN); Haoyang Yu, Beijing (CN); Puguang Song, Beijing (CN); Aixin Wang, Beijing (CN); and Changhua Hong, Beijing (CN)
Assigned to China Building Materials Academy, Beijing (CN)
Appl. No. 17/768,692
Filed by China Building Materials Academy, Beijing (CN)
PCT Filed Jan. 29, 2022, PCT No. PCT/CN2022/075011
§ 371(c)(1), (2) Date Apr. 13, 2022,
PCT Pub. No. WO2023/040168, PCT Pub. Date Mar. 23, 2023.
Claims priority of application No. 202111074733.6 (CN), filed on Sep. 14, 2021.
Prior Publication US 2023/0242436 A1, Aug. 3, 2023
Int. Cl. C03C 3/068 (2006.01); C03C 13/04 (2006.01); C03B 37/02 (2006.01); C03B 5/08 (2006.01); C03B 5/18 (2006.01); C03B 37/012 (2006.01); C03B 37/027 (2006.01); C03B 25/02 (2006.01); C03B 5/225 (2006.01); G02B 6/06 (2006.01)
CPC C03C 3/068 (2013.01) [C03B 5/08 (2013.01); C03B 5/18 (2013.01); C03B 5/225 (2013.01); C03B 25/02 (2013.01); C03B 37/01268 (2013.01); C03B 37/027 (2013.01); C03C 13/045 (2013.01); C03C 2213/00 (2013.01); G02B 6/06 (2013.01)] 8 Claims
 
1. A composition of glass with high refractive index for fiber optic imaging elements with medium-expansion, comprising the following components in percentage by weight:
SiO2 5-9%
Al2O3 0-1%
B2O3 23-28%
CaO 0-3%
BaO 6-12%
La2O3 30-34%
Nb2O5 4-8%
Ta2O5 0-1%
Y2O3 0-1%
ZnO 4-9%
TiO2 4-8%
ZrO2 4-6%
SnO2 0-1%
wherein the glass with high refractive index has a refractive index of 1.80-1.82, a coefficient of mean linear thermal expansion of (68±5)×10−7/° C. in the range of 30-300° C., a strain point temperature of more than 600° C., and a devitrification temperature of more than 820° C.