Ferroelectric and dielectric properties of improper ferroelectric Ca8−xSrx[Al12O24 ](MoO4)2 multilayer capacitors

2020 ◽  
Vol 128 (9) ◽  
pp. 094101
Author(s):  
Sakyo Hirose ◽  
Tomoyasu Usui ◽  
Masahiko Tanaka ◽  
Yoshio Katsuya ◽  
Hiroki Taniguchi
Keyword(s):  
Dielectric Properties ◽  
Multilayer Capacitors

Structure property relationships in core-shell BaTiO3–LiF ceramics

1993 ◽  
Vol 8 (4) ◽  
pp. 871-879 ◽  
Author(s):  
C.A. Randall ◽  
S.F. Wang ◽  
D. Laubscher ◽  
J.P. Dougherty ◽  
W. Huebner
Keyword(s):  
Experimental Data ◽  
Dielectric Properties ◽  
Dielectric Property ◽  
Potential Application ◽  
Microstructural Development ◽  
Core Shell ◽  
Structure Property ◽  
The Core ◽  
Structure Property Relationships ◽  
Multilayer Capacitors

A sintering, microstructural development and dielectric property study of BaTiO3–LiF ceramics was performed to assess the potential application of low-fired multilayer capacitors. Not only does LiF allow for sintering below 1000 °C, it also allows for the manipulation of dielectric properties and interfaces within BaTiO3–LiF ceramics. Using mixing laws, a model of the dielectric properties of the core-shell microstructures is presented that agrees well with the observed experimental data.

Multilayer capacitors with bismuth copper tantalate dielectric fabricated in LTCC technology

2016 ◽  
Vol 33 (3) ◽  
pp. 118-123 ◽  
Author(s):  
Dorota Szwagierczak ◽  
Jan Kulawik ◽  
Beata Synkiewicz ◽  
Agata Skwarek
Keyword(s):  
Dielectric Properties ◽  
Grain Boundaries ◽  
Dielectric Response ◽  
Tape Casting ◽  
High Specific Capacitance ◽  
Frequency Range ◽  
Content Type ◽  
Temperature Range ◽  
New Material ◽  
Multilayer Capacitors

Purpose The work was aimed at preparation of green tapes based on a new material Bi2/3CuTa4O12, to achieve spontaneously formation of an internal barrier layer capacitor (IBLC), fabrication of multilayer elements using low temperature cofired ceramics (LTCC) technology and their characterization. Design/methodology/approach The study focused on tape casting, lamination and co-sintering procedures and dielectric properties of Bi2/3CuTa4O12 multilayer capacitors. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) studies of the ceramic elements were performed. Impedance spectroscopy was used for characterization of dielectric properties in the frequency range of 0.1 Hz to −2 MHz and in the temperature range from −55 to 400°C. DC conductivity was investigated in the temperature range 20 to 740°C. Findings SEM observations revealed a good compatibility of the applied commercial Pt paste with the ceramic layers. The EDS microanalysis showed a higher content of oxygen at grain boundaries. The dominant dielectric response, which was recorded in the low frequency range and at temperatures above 0°C, was attributed to grain boundaries. The dielectric response at low temperatures and/or high frequencies was related to grains. The fabricated multilayer capacitors based on Bi2/3CuTa4O12 exhibited a high specific capacitance. Originality/value A new material Bi2/3CuTa4O12 was applied for preparation of green ceramic tapes and utilized for fabrication of multilayer ceramic capacitors using the LTCC technology. This material belongs to the group of high permittivity nonferroelectric compounds with a complex perovskite structure of CaCu3Ti4O12, that causes the spontaneously formation of IBLCs.

Ceramics PMN-PT-PFN for Multilayer Capacitors

2012 ◽  
Vol 77 ◽  
pp. 47-52 ◽  
Author(s):  
Dariusz Bochenek ◽  
Ryszard Skulski ◽  
Paweł Wawrzała ◽  
Przemysław Niemiec
Keyword(s):  
Solid Solution ◽  
Dielectric Properties ◽  
Ceramic Powder ◽  
Second Step ◽  
Multilayer Ceramic Capacitors ◽  
Good Material ◽  
Ceramic Capacitors ◽  
Multilayer Capacitors ◽  
Multilayer Ceramic ◽  
Xrd Patterns

We present the technology of the solid solution with formula (1-y)[(1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3]-yPb(Fe1/2Nb1/2)O3 where x=0.25, y=0.1 i.e. 0.9(0.75PMN-0.25PT)-0.1PFN. The addition of PFN decreases the temperature of final sintering and as a result such composition is interesting material for multilayer ceramic capacitors (MLCC). The powder of 0.9(0.75PMN-0.25PT)-0.1PFN has been obtained in three steps. In first step we obtained MgNb2O6. In second step FeNbO4 was obtained. In final third step the 0.9(0.75PMN-0.25PT)-0.1PFN was obtained from mixed powders MgNb2O6, FeNbO4 and PbO and TiO2. For obtained ceramics the following investigations have been made: XRD patterns, microstructure, EDS and main dielectric properties v.s. temperature. It has been stated that obtained ceramic powder is a good material for obtaining MLCC

Structural and Dielectric Properties in (1−x )BaTiO3 -x Bi(Mg1/2 Ti1/2 )O3 Ceramics (0.1 ≤ x  ≤ 0.5) and Potential for High-Voltage Multilayer Capacitors

2013 ◽  
Vol 96 (7) ◽  
pp. 2197-2202 ◽  
Author(s):  
Doo Hyun Choi ◽  
Amanda Baker ◽  
Michael Lanagan ◽  
Susan Trolier-McKinstry ◽  
Clive Randall
Keyword(s):  
Dielectric Properties ◽  
High Voltage ◽  
Multilayer Capacitors

Low Temperature Sintering and Characterization of MgTiO3

2011 ◽  
Vol 61 ◽  
pp. 95-99
Author(s):  
M. Aliouat ◽  
B. Itaalit ◽  
N. Amaouz ◽  
Ahcène Chaouchi
Keyword(s):  
Dielectric Properties ◽  
Noble Metals ◽  
Sintering Temperature ◽  
Consumer Electronics ◽  
Electronic Components ◽  
Multilayer Ceramic Capacitors ◽  
Economic Issues ◽  
Multilayer Capacitors ◽  
Tan Δ

The development of consumer electronics has meant that the component market is subjected of major economic issues. The economic battle goes through a search of lower manufacturing costs of electronic components together with an improvement in their performance, especially multilayer ceramic capacitors. The dielectric properties of the compound MgTiO3 (r  17, ε =100 ppm/°C, Tan (δ) <10-3) make this material a very good candidate for the manufacture of multilayer capacitors. In contrast, the high sintering temperature of this ceramic (1350 ° C), precludes the realization of multilayer capacitors with copper inner electrodes (T melting = 1083 ° C) less expensive than noble metals (Pd or Pt). Recent studies have shown that it is possible to reduce the sintering temperature by adding sintering agents. Additions made on MgTiO3 are glass phases (BBS 5Z2B, SBAZN, BBZS). Interesting dielectric properties were obtained in the case of system MgTiO3 + BBZS sintered at 1030 ° C: a dielectric permittivity epsilon r = 15.46, a temperature coefficient of 207 ppm / ° C, dielectric losses Tan (δ) <10-3.

SYNTHESIS AND DIELECTRIC PROPERTIES OF LIQUID CRYSTALS CONTAINING TWO CYANO GROUPS

1979 ◽  
Vol 40 (C3) ◽  
pp. C3-37-C3-40
Author(s):  
L. A. KARAMYSHEVA ◽  
S. I. TORGOVA ◽  
E. I. KOVSHEV ◽  
M. I. BARNIK
Keyword(s):  
Liquid Crystals ◽  
Dielectric Properties ◽  
Cyano Groups

Investigation of Dielectric Properties of (1-x) Ni0.53Cu0.12Zn0.35Fe1.88O4 ferrite + (x) Gd0.2Ce0.8O3 for Multilayer Chip Inductors

2012 ◽  
Vol 03 (1) ◽  
pp. 71-73
Author(s):  
S. Bharadwaj ◽  
◽  
Suman Kumar Burnwal ◽  
T. Ramesh ◽  
S.R. Murthy ◽  
...  
Keyword(s):  
Dielectric Properties

Effect of Cow Manure on Dielectric Properties of Clay Loam Soil at Microwave Frequency

2012 ◽  
Vol 2 (2) ◽  
pp. 374-375
Author(s):  
Asha Buliya ◽  
◽  
K. C. Pancholi K. C. Pancholi ◽  
R. K. Paliwal R. K. Paliwal
Keyword(s):  
Dielectric Properties ◽  
Microwave Frequency ◽  
Cow Manure ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil
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