Bulletin of Materials Science

volume 23, No.4, August 2000

CONTENTS



Phase Transitions

Phase transition in Na2TeO4 ceramics                                                        N K Singh and R N P Choudhary          239

Refractory Cements

Ceramic joining through reactive wetting of alumina with cakcium aluminate refractory cements         K Geetha,
                                                                                                                        AM Umarji and T R N Kutty         243

Nitride Ceramics

Optimization of time-temperature schedule for nitridation of silicon compact on the basis of silicon and
nitrogen reaction kinetics                                                                                          J Rakshit and P K Das          249

Ceramics

Phase analysis and dielectric properties of ceramics in Pbo-MgO-ZnO-Nb2O5 system: A comparative study of
materials obtained by ceramic and molten salt synthesis routes                       M Thirumal and A K Ganguli           255

Nanomaterials

Incorporation of cobalt and nickel metal nano-particles in nano-grain zirconia film matrix by solution route
                                                                                                                              S Jana and P K Biswas           263

Superconductors

Specific heat studies in Ho-Ba-CuO superconductors: Fermionic and bosonic contributions
                                                                                        Dinesh varshney, Sanjay Shah and R K Singh          267

Composite Materials

Conductivity, dielectric behaviour and magnetoelectric effect in copper ferrite-barium titanate composites
                                                                      R P Mahajan, K K Patankar, M B Kothale and S A Patil          273

Glasses

EPR, IR and DC conductivity studies of xCuo-(100 -x) B2O3 glasses D Sreenivasu and V Chandramouli         281
Dielectric properties of NaF-B2O3 glasses doped with certain transition metal ions        M Krishna Murthy,
                                                                                                                  K S N Murthy and N Veeraiah         285

Alloys

A test for diffusional coherency strain hypoyhesis in the discontinuous precipitation in Mg-Al alloy
                                                                       K T Kashyap, C Ramachandra, V Bhat and B Chatterji          295

Material Synthesis

Thermal  formation of corundum from aluminium hydroxides prepared from various aluminium salts
                                                                       J Temuujin, Ts Jadamba, K J D Mackenzie, P Angerer,         301

Calcium ferrite formation from the thermolysis of calcium tris (maleato) ferrate (III)
                                                                                                     B S Randhawa and Kamaljeet Sweety        305

Thin Films

Gas-chromism in ultrasonic spray pyrolyzed tungsten oxide thin films                                              P S Patil          309

Structural characterization of vacuum evaporated ZnSe thin films           Pradip Kr Kalita, B K Sarma and
                                                                                                                                                     H L Das         313

Polymers

An Experimental investigation of electrical conductivities in biopolymers                H Mallick and A Sarkar         319

Electrical Properties

Electrical properties in ethyl cellulose-chloranil system                    P K Khare, R K Pandey and P L Jain          325

Current-voltage studies on b-FeSi2/Si heterojunction                                       A Datta, S Kal and S Basu          331
Electrical conductivity measurements on gel grown KDP Crystal added with some ammonium compounds
                                                                                                                   T H Freeda and Mahadevan          335

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