Hazard and Precautionary Statements (GHS)

Barium pyroborate Chemical Properties,Usage,Production

Preparation

Barium pyroborate can be prepared by the reaction of the oxides at high temperature:
2BaO + B2O3 + heat→Ba2B2O5
Crystals can be grown from a mixture containing appropriate amounts of BaCO3 and H3BO3, using KFB4 as a flux. The mixture is thoroughly milled, heated in a platinum crucible in air to 1193 K (920 °C), and kept at that temperature for 15 h. The temperature is then quickly quenched to 1053 K (880 °C) and slowly cooled from 1053 to 973 K (700 °C) at a rate of 0.011 K/h and then air quenched to room temperature. Colorless crystals are obtained.