Effect of gamma radiation and thermal treatment on some physical properties of ZnO-PbO-B sub 2 O sub 3 glasses Doweidar, H; Abou Zeid, M A; El-Damrawy, G M [Mansoura Univ. (Egypt). Physics Dept.] 36 MATERIALS SCIENCE; BORON OXIDES; CRYSTAL STRUCTURE; GLASS; MICROHARDNESS; GAMMA RADIATION; HEAT TREATMENTS; LEAD OXIDES; ZINC OXIDES; PHASE TRANSFORMATIONS; BORON COMPOUNDS; CHALCOGENIDES; ELECTROMAGNETIC RADIATION; HARDNESS; IONIZING RADIATIONS; LEAD COMPOUNDS; MECHANICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; RADIATIONS; ZINC COMPOUNDS; 360605* - Materials- Radiation Effects The microhardness H{sub V} of xZnO.(50-x)PbO.50B{sub 2}O{sub 3} glasses has been studied as a function of ZnO content and gamma dose. H{sub V} shows a maximum at about 15 mol.% ZnO. {sup 11}B NMR, the Nuclear Magnetic Resonance, suggests the formation of non-bridging oxygen ions in the borate network as ZnO is added in the PbO.B{sub 2}O{sub 3} glass. Both the density and the molar volume decrease with the increase of ZnO. Irradiation with gamma rays lowers the microhardness, whereas heat treatment causes its increase. Infrared investigations indicate that radiation induced defects can activate phase separation processes when the irradiated glass is heat treated. (author). United Kingdom 1991-12-14 English Journal Article Journal Name: Journal of Physics. D, Applied Physics; (United Kingdom); Journal Volume: 24:12 Medium: X; Size: Pages: 2222-2228 https://doi.org/10.1088/0022-3727/24/12/015 [] 24:12 Journal ID: ISSN 0022-3727; CODEN: JPAPB GBN; AIX-23-025200; EDB-92-050145 2010-12-29 5619502