in neat (no solvent)
H3BO3:melamine were mixed in 2:1 ratio, heating at 200 and 300 °Cfor 1 and 2 h, resp., cooling, pulverizing, powder was put into a furna ce heated up to 1600 °C for 15 min; detn. by XPS;
Gebregiorgis, Taddesse; Gordon, Manfred
Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1984 , vol. 80, p. 359 - 382