SU FANG, YU WEI-ZHONG, DAI DAO-YANG, ZHAO ZONG-YUAN. POSITRON LIFETIME SPECTRA AND SCANNING ELECTRON MICROSCOPE INVESTIGATIONS DURING THE CRYSTAL-LIZATION PROCESS OF AMORPHOUS IONIC CONDUCTOR B2O3-0.7Li2O-0.7LiCl-xAl2O3J. Acta Physica Sinica, 1985, 34(5): 622-627. DOI: 10.7498/aps.34.622