scholarly journals Interrelationship among dielectric constant, energy band parameters and ionicity in multi-component oxide glasses revealed by optical- and THz-band spectroscopy

2021 ◽  
Vol 573 ◽  
pp. 121135
Author(s):  
Osamu Wada ◽  
Doddoji Ramachari ◽  
Chan-Shan Yang ◽  
Ci-Ling Pan
Keyword(s):  
Dielectric Constant ◽  
Energy Band ◽  
Oxide Glasses ◽  
Constant Energy

Photokapazitiver Effekt und Lumineszenz unter IR-Bestrahlung

1964 ◽  
Vol 19 (4) ◽  
pp. 454-458 ◽  
Author(s):  
Frank Matossi ◽  
Dieter Siebert
Keyword(s):  
Dielectric Constant ◽  
Energy Band ◽  
Infrared Radiation ◽  
Band Model ◽  
Loss Angle ◽  
Capacitance Change ◽  
Effect Change ◽  
Conduction Electrons ◽  
Dielectric Constant And Loss ◽  
Uv Excitation

The photocapacitive effect (change of dielectric constant and loss angle by uv-radiation) is modified by additional infrared radiation either during or after uv excitation. This is investigated in some detail for a phosphor with photodielectric effect where the capacitance change is essentially due to polarization of filled traps. There are indications for the influence of reversible occupation changes among traps. Results with a phosphor whose capacitance change is due to conduction electrons are not yet conclusive with respect to a detailed energy band model; they show, however, that both conduction band and valence band participate in the processes.

High dielectric constants in BaTiO3 doped 90V2O5−10Bi2O3 oxide glasses obeying Debye-type dielectric relaxation behavior

1994 ◽  
Vol 9 (8) ◽  
pp. 1932-1935 ◽  
Author(s):  
Sahana Chakraborty ◽  
A.K. Bera ◽  
S. Mollah ◽  
B.K. Chaudhuri
Keyword(s):  
Dielectric Constant ◽  
Dielectric Relaxation ◽  
Dilution Effect ◽  
Dielectric Behavior ◽  
Dielectric Constants ◽  
Relaxation Behavior ◽  
Oxide Glasses ◽  
Base Glass ◽  
Dielectric Relaxation Behavior ◽  
High Dielectric

BaTiO3 doped 90V2O5−10Bi2O3 (VB) oxide glasses show a larger dielectric constant (102-104) compared to that of the base glass VB (∼102). The VB glass with 15 wt.% BaTiO3 shows the largest dielectric constant, and all the glasses show a Debye-type dielectric relaxation behavior. The increase in dielectric constant appears to be mainly due to the formation of microcrystalline clusters of BaTiO3 (1.8–8 μm, depending on the BaTiO3 concentration present in the base glass). Other than the dilution effect with BaTiO3, the glass-former oxide Bi2O3 also influences the dielectric behavior of BaTiO3 doped VB glasses.

Frequency and composition dependency of optical and dielectric properties of PMMA/boehmite nano-hybrid prepared via facile aqueous one-pot process

2017 ◽  
Vol 31 (11) ◽  
pp. 1750120 ◽  
Author(s):  
Misagh Ghamari ◽  
Gholamali Farzi
Keyword(s):  
Dielectric Constant ◽  
Chemical Bond ◽  
Silane Coupling Agent ◽  
Fourier Transforms ◽  
Weight Ratio ◽  
Absorption Index ◽  
One Pot ◽  
Constant Energy ◽  
Silane Coupling ◽  
Organic Weight

Optical properties of PMMA/boehmite nano-hybrid synthesized directly from their relevant precursors via facile aqueous one-pot process is studied. Silane coupling agent was applied to make compatible chemically the organic–inorganic counterparts. The chemical bond of SiOAl as the main link between organic and inorganic moieties was confirmed by Fourier transforms infrared (FTIR) spectra. The chemical bond of Si–O–Al as the main link between organic and inorganic moieties. Determining the refractive and absorption index, real and imaginary parts of dielectric constant, energy loss function, and their distribution for PMMA/boehmite nano-hybrid as a function of boehmite loading was assessed in the range of 12–120 THz using FTIR data and Kramers–Kronig relations. The inorganic/organic weight ratio varied from 0.7% to 5% and its impact on optical features was evaluated. It was demonstrated that the optical features of hybrids are frequency-dependent and less affected from boehmite incorporation.

Interaction Parameter of BaO-Bi2O3-B2O3-SiO2 Glasses

2013 ◽  
Vol 644 ◽  
pp. 157-160
Author(s):  
Mu Zhang ◽  
Xu Han ◽  
Da Wei Yu ◽  
Xin Yu Zhao
Keyword(s):  
Dielectric Constant ◽  
Refractive Index ◽  
Interaction Parameter ◽  
Production Cost ◽  
Nonlinear Optical ◽  
Chemical Durability ◽  
Binary Oxide ◽  
Oxide Glasses ◽  
Material Engineering ◽  
Oxide Ion

Interaction parameter A proposed in Yamashita-Kurosawa’s theory of dielectric constant, has been calculated for numerous binary oxide glasses on the basis of polarizability of oxide ion determined from refractive index. However, there are only a few reports on the multi-component oxide glasses system, especially BaO-Bi2O3-B2O3-SiO2 glasses system (G-BBBSO). Bismuth/barium-containing crystals have attracted much attention in application of material engineering because of their importance for the development of nonlinear optical (NLO) information processing technology. Compared to crystals, glasses have shown many advantages in the material engineering, such as easier shaping in casting procedures, low production cost and high thermal and chemical durability. Prompted by these interests in application of material engineering, we reported new data of interaction parameter of BaO-Bi2O3-B2O3-SiO2 glasses system (G-BBBSO) for the different wavelength range (480, 546.1 and 643.8 nm)

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