Neutron scattering from the superionic glasses, (AgI) x(AgPO 3) 1− x, through the glass transition

• Published in: Solid state ionics Vol. 138; no. 1; pp. 115 - 121
• Main Authors: Kartini, E, Collins, M.F, Indayaningsih, N, Svensson, E.C
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.12.2000; Elsevier Science
• Subjects: Condensed matter: structure, mechanical and thermal properties; Disordered solids; Exact sciences and technology; Glass transition; Glasses; Neutron diffraction; Physics; Structure of solids and liquids; crystallography; Superionic glass; Thermal expansion; Glass transition; Superionic glass; Thermal expansion; Neutron diffraction; Inorganic compounds; Structure factors; Ternary compounds; Iodophosphates; Transition element compounds; Composition effect; Binary systems; Glass structure; Phosphate glass; Experimental study; Heat treatments; Neutron diffusion; Superionic conductors; DSC; Temperature effects; Glass transformations; Silver compounds
• ISSN: 0167-2738; 1872-7689
• DOI: 10.1016/S0167-2738(00)00781-5

We have performed neutron scattering measurements to study the temperature dependence of the scattering from the superionic glasses (AgI) x (AgPO 3) 1− x with x=0.0, 0.3, 0.5 and 0.7 between room temperature and a temperature well above the calorimetric glass transition temperature, T g. The temperature dependence of the positions of the glass/liquid diffraction peaks is featureless except in the pure AgPO 3 glass where we observe a change in the temperature derivative of the positions of the first and third peaks at T g. We compare our results with the macroscopic thermal expansion. The peak intensities show an anomalous decrease on heating that occurs at a temperature about 5–15% higher than T g.