CALCULATED DIELECTRIC PARAMETER OF BARIUM TITANATE-LEAD TITANATE COMPOSITES AS FUNCTIONS OF COMPOSITION AND FREQUENCY

1991 ◽  
Vol 05 (05) ◽  
pp. 357-363
Author(s):  
S.K. SARKAR
Keyword(s):  
Dielectric Constant ◽  
Barium Titanate ◽  
Lead Titanate ◽  
Strength Loss ◽  
Dielectric Strength ◽  
Simplified Model ◽  
Connectivity Pattern ◽  
Dielectric Parameter ◽  
Dielectric Parameters ◽  
Titanate Lead

Some dielectric parameters, e.g. dielectric constant, resistivity, dielectric strength, loss tangent, saturation polarisation, coercive field, of barium titanate-lead titanate composites have been calculated as functions of composition and frequency, assuming a very simplified model and a 3–0 connectivity pattern. Most of the parameters have been found to vary linearly with composition at a given frequency.

CALCULATED DIELECTRIC PARAMETERS OF BARIUM TITANATE-SODIUM NIOBATE COMPOSITES AS FUNCTION OF COMPOSITION AND FREQUENCY

1989 ◽  
Vol 03 (11) ◽  
pp. 839-846
Author(s):  
S.K. SARKAR
Keyword(s):  
Dielectric Constant ◽  
Barium Titanate ◽  
Loss Tangent ◽  
Strength Loss ◽  
Dielectric Strength ◽  
Simplified Model ◽  
Connectivity Pattern ◽  
Sodium Niobate ◽  
Dielectric Parameters ◽  
Saturation Polarization

Some dielectric parameters e.g. dielectric constant, resistivity, dielectric strength, loss tangent, coercive field and saturation polarization of barium titanate-sodium niobate composites have been calculated as a function of composition and frequency. assuming a very simplified model and a 3–0 connectivity pattern. Most of the parameters have been found to vary linearly with composition at a given frequency.

CALCULATED DIELECTRIC PARAMETERS OF BARIUM TITANATE-POTASSIUM NIOBATE COMPOSITES AS A FUNCTION OF COMPOSITION AND FREQUENCY

1989 ◽  
Vol 03 (09) ◽  
pp. 677-684
Author(s):  
S.K. SARKAR
Keyword(s):  
Dielectric Constant ◽  
Barium Titanate ◽  
Loss Tangent ◽  
Strength Loss ◽  
Dielectric Strength ◽  
Simplified Model ◽  
Connectivity Pattern ◽  
Potassium Niobate ◽  
Dielectric Parameters ◽  
Saturation Polarization

Some dielectric parameters e.g. dielectric constant, resistivity, dielectric strength, loss tangent, and saturation polarization of barium titanate-potassium niobate composites have been calculated as a function of composition and frequency, assuming a very simplified model and a 3–0 connectivity pattern. Most of the parameters have been found to vary linearly with composition at a given frequency.

CALCULATED DIELECTRIC PARAMETERS OF BARIUM TITANATE-POTASSIUM TANTALATE COMPOSITES AS A FUNCTION OF COMPOSITION AND FREQUENCY

1990 ◽  
Vol 04 (13) ◽  
pp. 877-884
Author(s):  
S.K. SARKAR
Keyword(s):  
Dielectric Constant ◽  
Barium Titanate ◽  
Loss Tangent ◽  
Coercive Field ◽  
Strength Loss ◽  
Dielectric Strength ◽  
Simplified Model ◽  
Connectivity Pattern ◽  
Dielectric Parameters ◽  
Potassium Tantalate

Some dielectric parameters such as dielectric constant, resistivity, dielectric strength, loss tangent, saturation polarisation, coercive field of barium titanate-potassium tantalate composites have been calculated as a function of composition and frequency, assuming a very simplified model and a 3–0 connectivity pattern. Most of the parameters have been found to vary linearly with composition at a given frequency.

CALCULATED DIELECTRIC PARAMETERS OF BARIUM TITANATE-LEAD ZIRCONATE COMPOSITES AS A FUNCTION OF COMPOSITION AND FREQUENCY

1990 ◽  
Vol 04 (06) ◽  
pp. 381-387
Author(s):  
S. K. SARKAR
Keyword(s):  
Dielectric Constant ◽  
Barium Titanate ◽  
Loss Tangent ◽  
Coercive Field ◽  
Dielectric Strength ◽  
Lead Zirconate ◽  
Connectivity Pattern ◽  
Dielectric Parameters ◽  
Saturation Polarization ◽  
Titanate Lead

Some dielectric parameters e.g. dielectric constant, resistivity, dielectric strength, saturation polarization, loss tangent and coercive field of barium titanate-lead zirconate composites have been calculated as a function of composition and frequency. Most of the dielectric parameters have been found to vary linearly with composition and frequency. A 3–0 connectivity pattern of the composites has been assumed in calculating the dielectric parameters.

Preparation and Dielectric Property of Al2O3 Surface Coating Modified BaTiO3/Polyimide Composite Film

2014 ◽  
Vol 908 ◽  
pp. 63-66
Author(s):  
Ya Jun Wang ◽  
Xiao Juan Wu ◽  
Chang Gen Feng
Keyword(s):  
Dielectric Constant ◽  
Barium Titanate ◽  
Composite Film ◽  
Breakdown Strength ◽  
In Situ Polymerization ◽  
Chemical Properties ◽  
Dielectric Strength ◽  
Xrd Analysis ◽  
Nanocomposite Films ◽  
The Matrix

Polyimide (PI) was chosen as the matrix of the composite, barium titanate/polyimide (BT/PI) nanocomposite films were prepared by in situ polymerization. In order to improve the dispersion and the physical-chemical properties of BT surface, barium titanate was modified by Al2O3coating and modified BT/PI nanocomposite films were prepared. The prepared modified BT was characterized by X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM), and the dielectric properties of the composites were characterized in detail. It was shown that surface modification with Al2O3is the chemical process and there were new substances forming. When BT was modified by 10 wt% Al2O3, the dielectric constant of the composite film was 18.96 (103Hz), the loss tangent 0.005, breakdown strength 70 MV·m-1, energy storage density 0.41 J·cm-3. The dielectric constant of BT modified by Al2O3is decreased while the dielectric strength of the modified BT/PI composite film is increased.

Preparation of BaTiO3 and PbTiO3 thin Films on BaPb3 Substrates by the SOL-GEL Method and Their Properties

1992 ◽  
Vol 271 ◽  
Author(s):  
M. KuWabAra ◽  
T. Kuroda ◽  
S. Takahashi ◽  
T. Azuma
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
Lead Titanate ◽  
Room Temperature ◽  
Sol Gel ◽  
Ceramic Substrates ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ceramic Thin Films ◽  
Titanate Lead

ABSTRACTBarium titanate, lead titanate and barium-lead titanate thin films were prepared by the sol-gel method using metal alkoxides on metallic conducting BaPbO3 ceramic substrates. Thin films were deposited on the polished surfaces of the substrates by spin coating solutions containing Ba(OC2H4OCH3)2, Pb(OCOCH3)2 and Ti(O-iC3H7)4 and methoxyethanol. The gel films were then fired at appropriate temperatures to yield ceramic thin films. A 0.50 µm-thick BaTio3 film showed a dielectric constant of 280 and tan ° of 3% at 1kHz with no distinguishable peak of dielectric constant at any temperature between 20°C and 200°C. Both PbTiO3 (0.75 µm thick) and Ba0.7Pb0.3 (0.2 µm thick) films, on the other hand, showed a distinguishable peak of dielectric constant at their Curie point with a rather deformed P-E hysteresis loop at room temperature.

A Study of Some Mechanical and Physical Properties for Palm Fiber/Polyester Composite

2020 ◽  
Vol 38 (3B) ◽  
pp. 104-114
Author(s):  
Samah M. Hussein
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Dielectric Constant ◽  
Date Palm ◽  
Volume Fraction ◽  
Unsaturated Polyester ◽  
Dielectric Strength ◽  
Palm Fiber ◽  
Mechanical And Physical Properties ◽  
Polyester Composite

This research has been done by reinforcing the matrix (unsaturated polyester) resin with natural material (date palm fiber (DPF)). The fibers were exposure to alkali treatment before reinforcement. The samples have been prepared by using hand lay-up technique with fiber volume fraction of (10%, 20% and 30%). After preparation of the mechanical and physical properties have been studied such as, compression, flexural, impact strength, thermal conductivity, Dielectric constant and dielectric strength. The polyester composite reinforced with date palm fiber at volume fraction (10% and 20%) has good mechanical properties rather than pure unsaturated polyester material, while the composite reinforced with 30% Vf present poor mechanical properties. Thermal conductivity results indicated insulator composite behavior. The effect of present fiber polar group induces of decreasing in dielectric strength, and increasing dielectric constant. The reinforcement composite 20% Vf showed the best results in mechanical, thermal and electrical properties.

Influence of Ca-Doping on Structural, Magnetic and Dielectric Properties of Ba3Co2-xCaxFe24O41 Hexaferrite Powders

2015 ◽  
Vol 241 ◽  
pp. 226-236 ◽  
Author(s):  
Neha Solanki ◽  
Rajshree B. Jotania
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Sol Gel ◽  
Calcium Content ◽  
Combustion Method ◽  
Dielectric Behavior ◽  
Dielectric Parameters ◽  
Ca Doping ◽  
Auto Combustion ◽  
Magnetic And Dielectric Properties

Influence of Ca substitution on structural, magnetic and dielectric properties of Ba3Co2-xCaxFe24O41(where x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0), prepared by Sol-Gel auto-combustion method, has been investigated in present studies. The obtained powder was sintered at 950 oC for 4 hrs. in the static air atmosphere. Structural analysis of Ca-doped Ba3Co2-xCaxFe24O41powders revealed pure Z-type hexaferrite phase at low temperature. The frequency dependent dielectric constant (Єʹ) and magnetic properties such as remanent magnetization (Mr), saturation magnetization (Ms) and coercivity (Hc) were studied. It is observed that coercivity increased gradually with increase in calcium content. The real dielectric constant (Єʹ) and dielectric loss tangent (tan δ) were studied in the frequency range of 20Hz to 2MHz. The dielectric parameters for all samples show normal dielectric behavior as observed in hexaferrites. Contents of Paper

Sign in / Sign up

Export Citation Format

Share Document