It is generally accepted that. fused BZ03 is composed of B0 3 triangles. These triangles are joined togetner randomly, forming l the glass network. I.R. studies and x-ray diffraction studies on pure BZ03 glass indicated clearly that these triangles are joined together forming boroxole groups. These groups are joined together forming the random network. It is also accepted that addition of alkali oxides to boron oxide results in a glassy network in \
Table of Contentsof Volume 2.- Polymers.- Environmental Crazing and Fracture of Polymers in Nitrogen, Argon, and Helium.- Electrical Behaviour of Irradiated Polymers.- The Effect of Polar Groups on the Post-Irradiation Conductivity of Polystyrene.- Glass.- Redox Reactions and the Colours of Ancient Glasses.- Some Materials Problems in the Design of Glass Fiber Optical Waveguides.- Optical Absorption Characteristics of Copper Ions in Some Binary Alkali Borate Glasses.- Optical Absorption Produced by Silver Particles in Glass and by Sodium Particles in a Sodium Chloride Matrix.- Structural Changes in Borate Glasses.- Some Properties of Photochromic Borosilicate Glass.- On the Interpretation of the Vibrational Spectra of Vitreous Silica and Alkali Silicates.- The Rheology of Alkali Borate Glasses.- The Influence of Microstructure on Glass Strength.- Mechanical Properties and Microstructure of Glass Ceramics and Phase Separated Glasses.- Static Fatigue in Glass.- Relief of Residual Stresses in Glasses by Application of Ultrasonic Energy.- Composites and Ceramics.- Anomalous Hall Effect in the Spinel System CuxNil-xFe2O4.- Some Physical and Mechanical Properties of Iron Calcium Borate-Aluminium Composites.- The Application of Composite Materials for Prosthetic Devices.- Thermally Induced Stresses in Laminated Fiber Composites.- Preparation and Mechanical Properties of Aluminium-Silicon Composites.- ?-Alumina Ceramics.- Metallurgy.- Lattice Defects and Their Role in the Pre-Precipitation Process in Al Alloys.- Effect of Large Undercooling on Alloy Properties.- Some Metallurgical Aspects of Phase Transformation Mechanism in Uranium-Ruthenium Alloys.- Measurement of the Thermal Expansivity of Ag and Some Ag-In Alloys by High Temperature X-Ray Diffraction Camera.- Corrosion of Molybdenum by Molten Antimony.- A Comparative Study of the Corrosion Behaviour of Steel in Neutral and Alkaline Media.- The Parametrization of the Fermi Surfaces of Certain b.c.c. Transition and Rare-Earth Metallic Elements.- Effects of the Friction Temperature on Steels During Sliding Tests.- The Effect of Composition and Temperature on the Mechanical Behaviour of Aluminium-Copper Alloys.- Effect of Fast Neutron Irradiation on the Mechanical Properties of Some Zirconium Alloys and Stainless Steels.- On the Final Size of G. P. Zones in Al-Zn 10% Alloy During Isothermal Ageing.- Crystalline Effects on the Total Thermal Neutron Cross Section of Chromium and Zirconium.- Neutron Diffraction Study of ErFe2.- of Volume 1.- of Volume 3.