BFO가 코팅된 유리비드를 얻기 위해 평균 직경 3 mm인 유리비드 40 g을 BFO 졸에 1시간 담궜다 빼서 자연 건조시켰다.
In order to obtain BFO-coated glass beads, 40 g of glass beads with an average diameter of 3 mm were immersed in a BFO sol for 1 hour, then removed, and air dried.