Molecular structure, glass transition temperature variation, agglomeration theory, and network connectivity of binary P-Se glasses
- 29 August 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 64 (13), 134204
- https://doi.org/10.1103/physrevb.64.134204
Abstract
Raman scattering and NMR results show that the backbone of binary glasses is composed of -chain fragments, pyramidal units, quasitetrahedral units, and ethylenelike units at low P content Concentrations of the various building blocks independently established from each spectroscopic probe are found to be correlated. Theoretical predictions for the glass transition variation from agglomeration theory are compared to the observed trends established from temperature-modulated differential scanning calorimetry. The comparison shows that a stochastic network description is an appropriate one of glasses at low At medium substantial medium-range structure evolves in the form of polymeric ethylenelike units that comprise elements of the barely rigid backbone. At higher a rapid phase separation of monomeric units from the backbone takes place, leading to a molecular glass with a rather low at
Keywords
This publication has 28 references indexed in Scilit:
- Darstellung und Kristallstruktur des ersten polymeren Phosphorselenids catena‐(P4Se4)xZeitschrift für anorganische und allgemeine Chemie, 1994
- Neues vom P4Se4Zeitschrift für anorganische und allgemeine Chemie, 1994
- An inorganic molecular glass: a glass transition for molecular tetraphosphorus triselenideJournal of Non-Crystalline Solids, 1991
- Observation of discrete molecular structures in glassyby Raman spectroscopyPhysical Review Letters, 1989
- Experimental Evidence for an Inorganic Molecular GlassPhysical Review Letters, 1988
- The structure of phosphorus-selenium glassesJournal of Non-Crystalline Solids, 1986
- X-ray single-crystal structure determination of copper(II), cobalt(II), and nickel(II) complexes of 2,2-bis(2'-pyridyl)- and 2,2-bis(6'-methyl-2'-pyridyl)-1,3-dioxolaneInorganic Chemistry, 1986
- The structure of phosphorus-selenium glasses I. Concentration dependence of the short- and intermediate-range orderJournal of Non-Crystalline Solids, 1984
- Glassy SemiconductorsPublished by Springer Science and Business Media LLC ,1981
- Glass transition and specific heats in the systems PS, PSe, AsS and AsSeJournal of Non-Crystalline Solids, 1979