Microwave dielectric properties of Mg2TiO4 ceramics synthesized via high energy ball milling method

Cheng, Lin; Liu, Peng; Qu, Shi-Xian; Cheng, Lei; Zhang, Huaiwu

doi:10.1016/j.jallcom.2014.10.149

Cited by 44 publications

(9 citation statements)

References 32 publications

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“…They were widely applied in mobile and satellite M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 2 communications such as filters, dielectric resonators and antennas due to a high Q·f, an appropriate ε r and a near-zero τ f [2,3]. Many dielectric ceramics also have been reported with excellent properties possibly used for practical application [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization, and dielectric properties of wolframite-structure MnZrNb 2 O 8 ceramics at microwave frequency

Pan

Feng

et al. 2015

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Preparation, characterization, and dielectric properties of wolframite-structure MnZrNb 2 O 8 ceramics at microwave frequency

Pan

Feng

et al. 2015

Journal of Alloys and Compounds

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“…Traces of MgO suggested an incomplete reaction due probably to the relatively low reaction temperatures of Equations (1) and (2). The presence of MgTiO 3 in the final products of Equations (1) and (2) could be attributed to the reaction of MgO with the thermite oxidant TiO 2 [ 26 , 27 ]. The formation of MgTiO 3 in the SHS-produced TiB 2 –MgAl 2 O 4 composites was also observed by Radishevskaya et al [ 10 ] using Ti, boron, and MgAl 2 O 4 as their starting materials and a partial decomposition of MgAl 2 O 4 during combustion synthesis was considered as a possible route resulting in the formation of MgTiO 3 .…”

Section: Resultsmentioning

confidence: 99%

Formation of TiB2–MgAl2O4 Composites by SHS Metallurgy

Yeh

Zheng

2023

Materials

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TiB2–MgAl2O4 composites were fabricated by combustion synthesis involving metallothermic reduction reactions. Thermite reagents contained Al and Mg as dual reductants and TiO2 or B2O3 as the oxidant. The reactant mixtures also comprised elemental Ti and boron, as well as a small amount of Al2O3 or MgO to serve as the combustion moderator. Four reaction systems were conducted and all of them were exothermic enough to proceed in the mode of self-propagating high-temperature synthesis (SHS). The reaction based on B2O3/Al/Mg thermite and diluted with MgO was the most exothermic, while that containing TiO2/Al/Mg thermite and Al2O3 as the diluent was the least. Depending on different thermites and diluents, the combustion front temperatures in a range from 1320 to 1720 °C, and combustion wave velocity from 3.9 to 5.7 mm/s were measured. The XRD spectra confirmed in situ formation of TiB2 and MgAl2O4. It is believed that MgAl2O4 was synthesized through a combination reaction between Al2O3 and MgO, both of which can be totally or partially produced from the metallothermic reduction of B2O3 or TiO2. The microstructure of the TiB2–MgAl2O4 composite exhibited fine TiB2 crystals surrounded by large densified MgAl2O4 grains. This study demonstrated an energy-saving and efficient route for fabricating MgAl2O4-containing composites.

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“…[(Mg 0.5 Zn 0.5 ) 0.95 Co 0.05 ] 2 TiO 4 was demonstrated as the optimal composition in the solid solution of (Mg, Zn) 2 TiO 4 -Co 2 TiO 4 with Q×f value ≈ 2100,000 GHz [460]. The average particle size of pure Mg 2 TiO 4 nano-powders was reduced to 163 nm via high energy ball milling method, and the excellent properties were ε r ≈ 13.9, Q×f value ≈ 98,600 GHz, and τ f ≈ -50.9 ppm/ [461]. Similarly to the formula of Mg ℃ 2 TiO 4 , spinel-based CoZnTiO 4 ceramics were obtained after sintered at 1200 , and th ℃ e properties were majored by the relative density and grain size [462].…”

Section: Abo 3 Formulamentioning

confidence: 97%

The latest process and challenges of microwave dielectric ceramics based on pseudo phase diagrams

et al. 2021

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The explosive process of 5G communication evokes the urgent demand of miniaturized and integrated dielectric ceramics filter. It is a pressing need to advance the development of dielectric ceramics utilization of emerging technology to design new materials and understand the polarization mechanism. This review provides the summary of the study of microwave dielectric ceramics (MWDCs) sintered higher than 1000 from 2010 up to now, °C with the purpose of taking a broad and historical view of these ceramics and illustrating research directions. To date, researchers endeavor to explain the structure-property relationship of ceramics with multitude of approaches and design a new formula or strategy to obtain excellent microwave dielectric properties. There are variety of factors that impact the permittivity, dielectric loss, and temperature stability of dielectric materials, covering intrinsic and extrinsic factors. Many of these factors are often intertwined, which can complicate new dielectric material discovery and the mechanism investigation. Because of the various ceramics systems, pseudo phase diagram was used to classify the dielectric materials based on the composition. In this review, the ceramics were firstly divided into ternary systems, and then brief description of the experimental probes and complementary theoretical methods that have been used to discern the intrinsic polarization mechanisms and the origin of intrinsic loss was mentioned. Finally, some perspectives on the future outlook for high-temperature MWDCs were offered based on the synthesis method, characterization techniques, and significant theory developments.

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Microwave dielectric properties of Mg2TiO4 ceramics synthesized via high energy ball milling method

Cited by 44 publications

References 32 publications

Preparation, characterization, and dielectric properties of wolframite-structure MnZrNb 2 O 8 ceramics at microwave frequency

Preparation, characterization, and dielectric properties of wolframite-structure MnZrNb 2 O 8 ceramics at microwave frequency

Formation of TiB2–MgAl2O4 Composites by SHS Metallurgy

The latest process and challenges of microwave dielectric ceramics based on pseudo phase diagrams

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