Elucidating the microwave dielectric properties of (Mg(1−x)Znx)2SnO4 ceramics

Chen, Yih-Chien

doi:10.1016/j.jallcom.2012.03.015

Cited by 22 publications

(23 citation statements)

References 16 publications

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“…0.95MgTiO 3 0.05CaTiO 3 ceramic has an ¾ r ³ 21, a Q©f ³ 56,000 (at 7 GHz), and a zero¸f value. 4) However, it requires sintering temperatures as high as 14001450°C. For practical applications, their sintering temperature needs to be reduced.…”

Section: )2)mentioning

confidence: 99%

High dielectric constant and low loss microwave dielectric ceramics of (1 − y)(Mg0.95Co0.05)2(Ti0.95Sn0.05)O4–y(Ca0.61Nd0.8/3)TiO3 for microwave applications

Wang

Liao

et al. 2016

J. Ceram. Soc. Japan

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High-quality (1 ¹ y)(Mg 0.95 Co 0.05 ) 2 (Ti 0.95 Sn 0.05 )O 4 y(Ca 0.61 Nd 0.8/3 )TiO 3 ceramics were prepared by solid-state reaction. The products were characterized by scanning electron microscopy, X-ray diffraction, and network analyzer. (Mg 0.95 Co 0.05 ) 2 (Ti 0.95 -Sn 0.05 )O 4 (MCTS) has a dielectric constant (¾ r ) of ³14.7, a high quality factor (Q©f ) of ³330, 134 GHz, and a temperature coefficient of resonant frequency (¸f ) of ³ ¹46 ppm/°C. 0.48 MCTS ¹0.52CNT has an excellent combination of microwave dielectric properties: ¾ r ³ 28.58, Q©f ³ 208027 GHz (at 9 GHz), and¸f ³ ¹4.38 ppm/°C sinter at 1325°C, and can be utilized in the fabrication of microwave devices. Therefore, a band-pass filter is designed and simulated using the proposed dielectric to study its performance.

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Section: )2)mentioning

confidence: 99%

High dielectric constant and low loss microwave dielectric ceramics of (1 − y)(Mg0.95Co0.05)2(Ti0.95Sn0.05)O4–y(Ca0.61Nd0.8/3)TiO3 for microwave applications

Wang

Liao

et al. 2016

J. Ceram. Soc. Japan

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“…1)3) The unique electrical properties of ceramic dielectric resonators have revolutionized the microwave-based wireless communications industry by reducing the size and cost of filter and oscillator components in circuit systems. 4), 5) Many studies have focused on the development of dielectric materials with a high quality factor (Q©f ) and a near-zero temperature coefficient of resonant frequency (¸f ) for dielectric resonators and microwave device substrates due to their high efficiency and stable performance.…”

Section: Introductionmentioning

confidence: 99%

“…Mg 4 Nb 2 O 9 -based ceramics have been utilized as dielectrics in resonators, filters and antennas for communication, and radar and global positioning systems operating at microwave frequencies. Several corundum ceramics, such as the A 4 9 ) ceramics have attracted a lot of attention due to their high Q values and low dielectric constants, which arise from the isolation of the NbO 6 octahedron by the MgO 6 octahedron layer and the cation vacancy layer in comparison with perovskite titanates.…”

Section: Introductionmentioning

confidence: 99%

“…Several corundum ceramics, such as the A 4 9 ) ceramics have attracted a lot of attention due to their high Q values and low dielectric constants, which arise from the isolation of the NbO 6 octahedron by the MgO 6 octahedron layer and the cation vacancy layer in comparison with perovskite titanates. In the corundum structure, each NbO 6 octahedral layer sandwiched by two layers of MgO 6 octahedron is a modified ¡-Al 2 O 3 structure.…”

Section: Introductionmentioning

confidence: 99%

“…Mg 4 Nb 2 O 9 ceramics have a corundum structure, which is a trigonal crystal system with a space group of (P 3c1). 4 (Nb 1¹x Ta x ) 2 O 9 ceramic powders were prepared using the solid-state reaction method by mixing individual highpurity oxides MgO, NiO, Ta 2 O 5 , and Nb 2 O 5 . The starting materials were stoichiometrically weighed after MgO was sintered at 800°C for 6 h to remove moisture and carbonates.…”

Section: Introductionmentioning

confidence: 99%

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Dielectric properties and crystal structure of (Mg0.95Ni0.05)4(Nb1−xTax)2O9 ceramics

Wang

Lin

et al. 2016

J. Ceram. Soc. Japan

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The microstructure of (Mg 0.95 Ni 0.05 ) 4 (Nb 1¹x Ta x ) 2 O 9 ceramics was analyzed using X-ray diffractometry and scanning electron microscopy. The quality factor (Q©f ) values of (Mg 0.95 Ni 0.05 ) 4 (Nb 1¹x Ta x ) 2 O 9 (x = 1) ceramics increase with increasing sintering temperature, with the maximum value obtained at 1375°C. The maximum values of electric permittivity (¾) and Q©f were 12.76 and 442,000 GHz, respectively, for (Mg 0.95 Ni 0.05 ) 4 (Nb 1¹x Ta x ) 2 O 9 (x = 1) ceramics sintered at 1375°C for 4 h. Furthermore, the temperature coefficient of resonant frequency (¸f ) measured for (Mg 0.95 Ni 0.05 ) 4 (Nb 1¹x Ta x ) 2 O 9 (x = 1) ceramics is ¹54 ppm/°C.

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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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Elucidating the microwave dielectric properties of (Mg(1−x)Znx)2SnO4 ceramics

Cited by 22 publications

References 16 publications

High dielectric constant and low loss microwave dielectric ceramics of (1 − <i>y</i>)(Mg<sub>0.95</sub>Co<sub>0.05</sub>)<sub>2</sub>(Ti<sub>0.95</sub>Sn<sub>0.05</sub>)O<sub>4</sub>–<i>y</i>(Ca<sub>0.61</sub>Nd<sub>0.8/3</sub>)TiO<sub>3</sub> for microwave applications

High dielectric constant and low loss microwave dielectric ceramics of (1 − <i>y</i>)(Mg<sub>0.95</sub>Co<sub>0.05</sub>)<sub>2</sub>(Ti<sub>0.95</sub>Sn<sub>0.05</sub>)O<sub>4</sub>–<i>y</i>(Ca<sub>0.61</sub>Nd<sub>0.8/3</sub>)TiO<sub>3</sub> for microwave applications

Dielectric properties and crystal structure of (Mg<sub>0.95</sub>Ni<sub>0.05</sub>)<sub>4</sub>(Nb<sub>1−</sub><i><sub>x</sub></i>Ta<i><sub>x</sub></i>)<sub>2</sub>O<sub>9</sub> ceramics

List of Low‐Loss Ceramic Dielectric Materials and Their Properties

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Elucidating the microwave dielectric properties of (Mg(1−x)Znx)2SnO4 ceramics

Cited by 22 publications

References 16 publications

High dielectric constant and low loss microwave dielectric ceramics of (1 &minus; <i>y</i>)(Mg<sub>0.95</sub>Co<sub>0.05</sub>)<sub>2</sub>(Ti<sub>0.95</sub>Sn<sub>0.05</sub>)O<sub>4</sub>&ndash;<i>y</i>(Ca<sub>0.61</sub>Nd<sub>0.8/3</sub>)TiO<sub>3</sub> for microwave applications

High dielectric constant and low loss microwave dielectric ceramics of (1 &minus; <i>y</i>)(Mg<sub>0.95</sub>Co<sub>0.05</sub>)<sub>2</sub>(Ti<sub>0.95</sub>Sn<sub>0.05</sub>)O<sub>4</sub>&ndash;<i>y</i>(Ca<sub>0.61</sub>Nd<sub>0.8/3</sub>)TiO<sub>3</sub> for microwave applications

Dielectric properties and crystal structure of (Mg<sub>0.95</sub>Ni<sub>0.05</sub>)<sub>4</sub>(Nb<sub>1&minus;</sub><i><sub>x</sub></i>Ta<i><sub>x</sub></i>)<sub>2</sub>O<sub>9</sub> ceramics

List of Low‐Loss Ceramic Dielectric Materials and Their Properties

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High dielectric constant and low loss microwave dielectric ceramics of (1 − <i>y</i>)(Mg<sub>0.95</sub>Co<sub>0.05</sub>)<sub>2</sub>(Ti<sub>0.95</sub>Sn<sub>0.05</sub>)O<sub>4</sub>–<i>y</i>(Ca<sub>0.61</sub>Nd<sub>0.8/3</sub>)TiO<sub>3</sub> for microwave applications

High dielectric constant and low loss microwave dielectric ceramics of (1 − <i>y</i>)(Mg<sub>0.95</sub>Co<sub>0.05</sub>)<sub>2</sub>(Ti<sub>0.95</sub>Sn<sub>0.05</sub>)O<sub>4</sub>–<i>y</i>(Ca<sub>0.61</sub>Nd<sub>0.8/3</sub>)TiO<sub>3</sub> for microwave applications

Dielectric properties and crystal structure of (Mg<sub>0.95</sub>Ni<sub>0.05</sub>)<sub>4</sub>(Nb<sub>1−</sub><i><sub>x</sub></i>Ta<i><sub>x</sub></i>)<sub>2</sub>O<sub>9</sub> ceramics