Notes on the System B2O3-SiO2-P2O5. Part I. The BPO4-SiO2 Join
JSGT 1955 V39 T113-T120
The· numerous obstacles attending the examination of the system B2O3–SiO2–P2O5 are outlined and illustrated. In spite of many experimental difficulties, a preliminary picture of the liquidus curve in the interval from 30 to 70% SiO2 has been established along the join BPO4–SiO2. The lowest melting mixture is located approximately at 62% SiO2 and at a temperature of 975°±25°. Refractive indices and thermal expansions of glasses along the join were determined.
W. F. Horn & F. A. Hummel
