Investigation of (1-x)(Mg0.6Zn0.4)0.95Co0.05TiO3–xSrTiO3Microwave Dielectrics

Wang, Junjie; Wang, Chun-Huy; Hsu, Tingkuei

doi:10.1143/jjap.48.081402

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…However, the experiment conditions to achieve such a high Q × f value were strict: not only high purity of raw materials but also long time sintering are needed. Researchers made effort to study the microstructures and microwave dielectric properties of (Mg 0.95 Co 0.05 )TiO 3 ceramics by various methods [10][11][12][13]. In most of these researches, (Mg 0.95 Co 0.05 )TiO 3 ceramics were prepared by conventional sintering (hereafter referred to as CS) route.…”

Section: Introductionmentioning

confidence: 99%

Reaction-sintering method for ultra-low loss (Mg0.95Co0.05)TiO3 ceramics

Ding

Liao

2011

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Reaction-sintering method for ultra-low loss (Mg0.95Co0.05)TiO3 ceramics

Ding

Liao

2011

Journal of Alloys and Compounds

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“…Newly developed materials have a variety of electrical properties (various complex permittivities), e.g., high-permittivity materials and lossy materials for microwave absorbers. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] It is urgently necessary to establish a versatile measurement method to characterize a variety of materials with complex permittivities. [15][16][17][18][19][20][21] A cylindrical cavity resonator has been widely utilized to evaluate the complex permittivity of dielectric materials.…”

Section: Introductionmentioning

confidence: 99%

A Method of Evaluating High-Permittivity and Lossy Materials Using a Cylindrical Cavity Based on Hybrid Electromagnetic Theory

Kinoshita

Kinouchi

Karim

et al. 2012

Jpn. J. Appl. Phys.

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A novel measurement method is proposed to evaluate the complex permittivity of material by using a cylindrical cavity resonator. The conventional cavity resonator methods have been based on the simple electromagnetic field analysis, and a rodlike sample should be loaded all the way from the top to the bottom of the resonator. However, the method proposed in this paper employs an accurate and efficient hybrid electromagnetic analysis method for the evaluation of materials and removes the restriction on the size of the sample materials. The radius and length of the sample are chosen considering the electrical characteristics of the sample, and the fact allows the expansion of the application range of the evaluation method to the materials with higher permittivity and/or higher loss. Also, the sample is not loaded in the insertion opening of the resonator in the proposed method. Therefore, it prevents the leakage of electromagnetic fields through opening and improves the accuracy of the evaluation of material with higher permittivity and/or higher loss. Complex permittivities of a few samples of ceramics with high permittivity and lossy electromagnetic absorber are measured in a microwave range to show the validity of this method.

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List of Low‐Loss Ceramic Dielectric Materials and Their Properties

2017

Microwave Materials and Applications 2V Set

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AbbreviationsST = sintering temperature ( • C) r = relative permittivity , f = measurement frequency (GHz) f = coefficient of temperature variation of resonant frequency (ppm/ • C) No. = serial number Qf = quality factor frequency product (GHz)The table lists the key property data of microwave dielectric materials available from published materials. These data are the relative permittivity ( r ), the product of the Q-factor and the frequency (Qf ), the frequency of measurement (f), and the temperature coefficient of the resonant frequency ( f ). In tabulating these data, we make no judgment on the measurement method and the reliability of the result. It is known that the ceramic properties such as porosity, grain size, raw materials used, impurities, measurement methods, and equipment used for measurements affect the dielectric properties and readers should be aware that exact comparison of data on materials of identical composition and manufactured in different laboratories using different processing conditions and measured by different methods would be expected to lead to small variations in properties. The data of dielectric measurements carried out using impedance methods at low (MHz) frequency is excluded as the errors in these methods mean that a loss tangent less than 10 −3 is unreliable. The data are arranged in the order of increasing relative permittivity. The quality factor of the microwave dielectric ceramics decrease significantly with increasing relative permittivity, as shown in Figure A.1. The inset in the figure shows the variation of quality factor frequency product with Microwave Materials and Applications, First Edition. Edited by Mailadil T. Sebastian, Rick Ubic and Heli Jantunen.

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Investigation of (1-x)(Mg_0.6Zn_0.4)_0.95Co_0.05TiO₃–xSrTiO₃Microwave Dielectrics

Abstract: AbslraeLExplicit expressions for the eigenvalues of lhe single-qcle class-sums [ ( p ) ( l ) " -P ], , of the symmetric group (S,) are mnstnrcted in a manner which makes

Cited by 6 publications

References 16 publications

Reaction-sintering method for ultra-low loss (Mg0.95Co0.05)TiO3 ceramics

Reaction-sintering method for ultra-low loss (Mg0.95Co0.05)TiO3 ceramics

A Method of Evaluating High-Permittivity and Lossy Materials Using a Cylindrical Cavity Based on Hybrid Electromagnetic Theory

List of Low‐Loss Ceramic Dielectric Materials and Their Properties

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