Title:
ENVIRONMENTAL PROTECTION TYPE DENSE FLINT GLASS WITH HIGH REFRACTIVE INDEX AND HIGH DISPERSION, AND METHOD AND DEVICE FOR PREPARING THE SAME
Document Type and Number:
WIPO Patent Application WO/2008/028341
Kind Code:
A1
Abstract:
An environmental protection type dense flint glass with high refractive index
and high dispersion is provided, the glass comprises, in wt%, SiO2
20-44, TiO2 22-34, Nb2O5 5-22, Na2O
7-18, BaO 9-17, K2O 0-9, CaO 0-3, ZrO2 0-3, SrO 0-0.5 and Sb2O3
0-0.5. A method for preparing the above glass is also provided, the method comprises
the following the steps: 1) mixing raw materials sufficiently to allow them to
be uniformly distributed; 2) melting the raw materials to an glass melt in a tank
furnace at 1150-1300 ºC to ensure uniform refractive index; 3) molding
the glass melt into glass strips after refining and homogenizing the glass melt
having qualified refractive index; and 4) annealing the glass strips in the annealing
oven. The device for producing the above glass comprises a tank furnace and an
annealing oven, wherein the molten pool of the tank furnace is connected with
automatically combustion-controlling system. The glass is free of PbO, As2O3
and GdO which pollute environment, and is produced in a mode of melting the raw
material at a time, thereby decreasing the number of melting raw materials at
high temperature and enhancing the optical transmittance.
Inventors:
SUN, Wei (No. 6 Jiangshenanzhi Road, Chengdu, Sichuan 1, 610051, CN)
孙伟 (中国四川省成都市建设南支路6号, Sichuan 1, 610051, CN)
LU, Mingxin (No. 6 Jiangshenanzhi Road, Chengdu, Sichuan 1, 610051, CN)
陆明新 (中国四川省成都市建设南支路6号, Sichuan 1, 610051, CN)
孙伟 (中国四川省成都市建设南支路6号, Sichuan 1, 610051, CN)
LU, Mingxin (No. 6 Jiangshenanzhi Road, Chengdu, Sichuan 1, 610051, CN)
陆明新 (中国四川省成都市建设南支路6号, Sichuan 1, 610051, CN)
Application Number:
CN2006/002483
Publication Date:
March 13, 2008
Filing Date:
September 21, 2006
Export Citation:
Assignee:
CDGM GLASS CO., LTD (No. 6 Jiangshenanzhi Road, Chengdu, Sichuan 1, 610051, CN)
成都光明光电股份有限公司 (中国四川省成都市建设南支路6号, Sichuan 1, 610051, CN)
SUN, Wei (No. 6 Jiangshenanzhi Road, Chengdu, Sichuan 1, 610051, CN)
孙伟 (中国四川省成都市建设南支路6号, Sichuan 1, 610051, CN)
LU, Mingxin (No. 6 Jiangshenanzhi Road, Chengdu, Sichuan 1, 610051, CN)
成都光明光电股份有限公司 (中国四川省成都市建设南支路6号, Sichuan 1, 610051, CN)
SUN, Wei (No. 6 Jiangshenanzhi Road, Chengdu, Sichuan 1, 610051, CN)
孙伟 (中国四川省成都市建设南支路6号, Sichuan 1, 610051, CN)
LU, Mingxin (No. 6 Jiangshenanzhi Road, Chengdu, Sichuan 1, 610051, CN)
International Classes:
C03C3/062; C03B3/02; C03B5/24; C03C3/078; C03C3/062; C03B3/00; C03B5/00; C03C3/076
Attorney, Agent or Firm:
CHENGDU HONGQIAO PATENT LAW OFFICE (Room 13, 15 16, 3rd Floor Hongwa Mansion,No. 22 South Section One,First Ring Road,Wuhou District, Chengdu, Sichuan 1, 610041, CN)