Cationic constraint effects in metaphosphate glasses

• DOI: 10.1063/1.4879559
• Publication Date: 2014-06-03T14:14:56Z
• Authors: Bruno P. Rodrigues; Lothar Wondraczek
• Keywords: Metaphosphate; Cationic polymerization; Rigidity (electromagnetism)

Temperature-dependent bond constraint theory (BCT) relies on counting the number of atomic degrees freedom for a given topology glass network. It has been proven useful as simplistic approach towards prediction properties. However, it breaks down at inclusion ionic bonds and is therefore presently unable to distinguish effects varying cationic species with predominantly bonding. Here, we consider treatment modifier ions in scope BCT. Using example metaphosphate glasses broad range cation species, find that fails predict properties because specific contribution each rigidity We introduce concept strength, which measure how strongly modifiers are bound surrounding oxygens through columbic forces.