Optical and thermal properties of binary calcium phosphate and barium phosphate glasses

✍ Scribed by E.T.Y. Lee; E.R.M. Taylor

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 171 KB
• Volume: 28
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2004.12.010

✦ Synopsis

Binary calcium phosphate and barium phosphate glasses corresponding to xCaO-(100 À x)P 2 O 5 and xBaO-(100 À x)P 2 O 5 , respectively, have been prepared in the range of 20 6 x 6 50. Assessment of the optical and thermal properties reveal that refractive index (n) and glass transition temperature (T g ) show a minima while thermal expansion coefficient (a) and thermo-optic coefficient (dn/dT) change monotonically as the amount of modifying oxides, CaO and BaO, increase. a > 9 • 10 À6 /°C is required for the calcium phosphate and barium phosphate glasses to exhibit negative dn/dT.