Effects of La3+ doping ions on dielectric properties and formation of Schottky barriers at internal interfaces in a Ca2Cu2Ti4O12 composite system

2014 ◽  
Vol 25 (10) ◽  
pp. 4657-4663 ◽  
Author(s):  
Prasit Thongbai ◽  
Jutapol Jumpatam ◽  
Bundit Putasaeng ◽  
Teerapon Yamwong ◽  
Vittaya Amornkitbamrung ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Composite System ◽  
Schottky Barriers

Preparation and Study of (1-m)(Mg0.8Zn0.2)TiO3·m{Ba4Nd28/3Ti18O54·0.18Bi2O3} Microwave Dielectric Ceramics

2014 ◽  
Vol 616 ◽  
pp. 166-173
Author(s):  
Xiao Li Ji ◽  
Peng Fei Hu ◽  
Song Zhang ◽  
Cheng C. Zhai ◽  
Fang Yi
Keyword(s):  
Dielectric Properties ◽  
Composite System ◽  
Sintering Temperature ◽  
Microwave Dielectric Ceramic ◽  
Microwave Dielectric Ceramics ◽  
Structure And Properties ◽  
Dielectric Ceramic ◽  
Two Phase ◽  
Microwave Dielectric ◽  
Dielectric Ceramics

In this work, the microwave dielectric ceramic (1-m)(Mg0.8Zn0.2)TiO3·m{Ba4Nd28/3Ti18O54·0.18Bi2O3}(m=0.1~0.4)(MZT-BNT) was studied to improve dielectric properties. The results of the dielectric properties, density, XRD and SEM show that the value of m and the sintering temperature affected the structure and properties of the ceramics. MZT-BNT composite system is a two-phase composite system. With the adding of BNT, the dielectric properties of MZT increase significantly. As m value increases, the bulk density and the dielectric constant of the composite system increase, while the quality factor reduces and the temperature coefficient of resonant frequency is close to zero. The dielectric properties of MZT-BNT sintered at 1200 °C (m = 0.3) are εr = 34.03, Qf = 7177 GHz,τf = -3.39 ppm/°C, respectively.

THE STRUCTURAL, SPECTRAL AND DIELECTRIC PROPERTIES OF COMPOSITE SYSTEM NZF-BT

2013 ◽  
pp. 110-124
Author(s):  
O. M. HEMEDA ◽  
A. TAWFIK ◽  
M. A. AMER ◽  
B. M. KAMAL ◽  
D. E. EL REFAAY
Keyword(s):  
Dielectric Properties ◽  
Composite System

MWCNTs/SiO 2 Composite System: Carrier Transmission, Twin-Percolation and Dielectric Properties

2011 ◽  
Vol 28 (10) ◽  
pp. 107701 ◽  
Author(s):  
Wen-Qiang Cao ◽  
Ming-Ming Lu ◽  
Bo Wen ◽  
Yuan-Lu Chen ◽  
Hong-Bo Li ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Composite System

Electrical and dielectric properties study of CaZrO3-CaTiO3 composite system by impedance spectroscopy

Ionics ◽  
2020 ◽  
Vol 26 (10) ◽  
pp. 5099-5111
Author(s):  
Khaoula Hkiri ◽  
Mohamed Ben Salem ◽  
Abdelhak Othmani ◽  
Mouldi Zouaoui
Keyword(s):  
Dielectric Properties ◽  
Impedance Spectroscopy ◽  
Composite System ◽  
Electrical And Dielectric Properties

Enhanced dielectric properties of acrylic resin elastomer based nanocomposite with thermally reduced graphene nanosheets

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 98440-98448 ◽  
Author(s):  
Gaoqiang Wang ◽  
Jingwen Wang ◽  
Shuwei Zhou ◽  
Senqiang Wu
Keyword(s):  
Dielectric Properties ◽  
Composite System ◽  
Graphene Nanosheets ◽  
Acrylic Resin ◽  
Thermal Reduction ◽  
Dielectric Composite ◽  
System P ◽  
Reduced Graphene ◽  
Acrylic Resin Elastomer

The graphene nanosheets prepared by thermal reduction was added to ARE to form a brand-new dielectric composite system.

Processing and characterization of YBa2Cu3O7−x/Ag composites

1990 ◽  
Vol 48 (4) ◽  
pp. 46-47
Author(s):  
Jafar Javadpour ◽  
Bradley L. Thiel ◽  
Sarikaya Mehmet ◽  
Ilhan A. Aksay
Keyword(s):  
Composite System ◽  
Precursor Solution ◽  
Microstructural Development ◽  
Superconducting Properties ◽  
Practical Applications ◽  
Nitrate Precursor ◽  
Cold Pressed ◽  
Tape Cast ◽  
Composite Samples

Practical applications of bulk YBa2Cu3O7−x materials have been limited because of their inadequate critical current density (jc) and poor mechanical properties. Several recent reports have indicated that the addition of Ag to the YBa2Cu3O7−x system is beneficial in improving both mechanical and superconducting properties. However, detailed studies concerning the effect of Ag on the microstructural development of the cermet system have been lacking. Here, we present some observations on the microstructural evolution in the YBa2Cu3O7−x/Ag composite system.The composite samples were prepared by mixing various amounts (2.5 - 50 wt%) AgNO3 in the YBa2Cu3O7−x nitrate precursor solution. These solutions were then spray dried and the resulting powders were either cold pressed or tape cast. The microstructures of the sintered samples were analyzed using SEM (Philips 515) and an analytical TEM (Philips 430T).The SEM micrographs of the compacts with 2.5 and 50 wt% Ag addition sintered at 915°C (below the melting point of Ag) for 1 h in air are displayed in Figs. 1 and 2, respectively.

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