Viscosity and kinetic fragility of alkaline earth zinc phosphate glasses

2012 ◽  
Vol 358 (12-13) ◽  
pp. 1480-1485 ◽  
Author(s):  
S. Striepe ◽  
J. Deubener
Keyword(s):  
Alkaline Earth ◽  
Zinc Phosphate ◽  
Phosphate Glasses

Theoretical Studies of the Spin Hamiltonian Parameters and Local Distortions for Cu2+ in Alkaline Earth Lead Zinc Phosphate Glasses

2016 ◽  
Vol 71 (8) ◽  
pp. 769-775 ◽  
Author(s):  
Bo-Kun Wang ◽  
Shao-Yi Wu ◽  
Zi-Yi Yuan ◽  
Zi-Xuan Liu ◽  
Shi-Xin Jiang ◽  
...  
Keyword(s):  
Field Strength ◽  
Crystal Field ◽  
Alkaline Earth ◽  
Zinc Phosphate ◽  
Phosphate Glasses ◽  
Spin Hamiltonian ◽  
Local Structures ◽  
Crystal Field Strength ◽  
Lead Zinc ◽  
Hamiltonian Parameters

AbstractThe spin Hamiltonian parameters and local structures are theoretically studied for Cu2+-doped alkaline earth lead zinc phosphate (RPPZ, R=Mg, Ca, Sr, and Ba) glasses based on the high-order perturbation calculations for a tetragonally elongated octahedral 3d9 cluster. The relative elongation ratios are found to be ρ≈3.2%, 4.4%, 4.6%, and 3.3% for R=Mg, Ca, Sr, and Ba, respectively, because of the Jahn-Teller effect. The whole decreasing crystal-field strength Dq and orbital reduction factor k from Mg to Sr are ascribed to the weakening electrostatic coulombic interactions and the increasing probability of productivity of nonbridge oxygen (and hence increasing Cu2+–O2− electron cloud admixtures) under PbO addition, respectively, with increasing alkali earth ionic radius. The anomalies (the largest Dq and the next highest k among the systems) for R=Ba are attributed to the cross linkage of this large cation in the network. The overall increasing order (Mg≤Ba<Ca<Sr) of ρ is largely due to the decreasing crystal-field strength Dq and hence the decreasing force constant of the Cu2+–O2− bonds. The present studies would be helpful to understand local structures and the influences on the optical properties of RPPZ glasses containing copper dopants.

Lithium-aluminum-zinc phosphate glasses activated with Tb3+ and Tb3+/Eu3+ for green laser medium, reddish-orange and white phosphor applications

2018 ◽  
Vol 79 ◽  
pp. 358-365 ◽  
Author(s):  
H.I. Francisco-Rodriguez ◽  
A. Lira ◽  
O. Soriano-Romero ◽  
A.N. Meza-Rocha ◽  
S. Bordignon ◽  
...  
Keyword(s):  
Zinc Phosphate ◽  
Green Laser ◽  
Phosphate Glasses ◽  
Laser Medium ◽  
Lithium Aluminum ◽  
Reddish Orange
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