Skip to main content

Ti3+-Free Titanoborophosphate Glasses as Molding Glasses with High Refractive Indices

Buy Article:

$51.00 plus tax (Refund Policy)


Ti3+-free titanoborophosphate TiO2–B2O3–P2O5 (TBP)-based glasses were produced in order to obtain glasses with low Tg (<600°C), high nd (>1.8), and a short postannealing (PA) time (less than a few days). In addition, TBP-based glasses with low Tg (<570°C), high nd (>1.85), and a short PA time were successfully developed with the substitution of Li2O and ZnO for B2O3. Some glasses had very suitable properties for precision glass molding (Tg=553°C, nd=1.851, PA time=4 days for 6Li2O·6ZnO·55TiO2·6B2O3·27P2O5 glass; Tg=563°C, nd=1.880, PA time=2 days for 5Li2O·60TiO2·10B2O3·25P2O5 glass; Tg=566°C, nd=1.885, PA time=3 days for 2.5Li2O·2.5ZnO·60TiO2·10B2O3·25P2O5 glass; and Tg=567°C, nd=1.890, PA time=1 day for 5Li2O·5ZnO·60TiO2·5B2O3·25P2O5 glass). The 70% of TBP-based glasses with nd>1.85 and commercially available molding glasses with nd>1.85 are 40–41 and 44–50, respectively, which means that these new glasses have even higher transparency in the visible region than those currently on the market. Thus, TBP-based glasses are considered to be promising materials as molding glasses with high transparency, low Tg, and high nd.

Document Type: Research Article


Affiliations: 1: Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie 514-8507, Japan 2: Koriyama Technical Center, Nidec Copal Corporation, Fukushima 963-8637, Japan

Publication date: June 1, 2009


Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more