Kinetic analysis on the synthesis of Mg0.95Zn0.05TiO3 microwave dielectric ceramic by polymeric precursor method

Ullah, Asad; Iqbal, Yaseen; Mahmood, Tahira; Mahmood, Asad; Akhtar, Naeem; Hamayun, Muhammad

doi:10.1016/j.ceramint.2015.08.075

Cited by 12 publications

(5 citation statements)

References 38 publications

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“…Before the discovery of BT, steatite, mica, MgTiO 3 , CaTiO 3 , and TiO 2 were widely used in capacitors. These materials exhibit ɛ r ≤ 100, which limits their use in the industry of dielectric capacitors [13][14][15]. During World War II, the need of high dielectric constant materials increased in capacitor applications [16,17].…”

Section: Electrical Propertiesmentioning

confidence: 99%

High-k Polymer Nanocomposites for Energy Storage Applications

Mahmood¹,

Akhtar²,

Mahmood³

2017

Properties and Applications of Polymer Dielectrics

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High dielectric (high-k) polymer nanocomposites that can electrostatically store energy are widely used in electronics and electric power systems due to their high breakdown strengths (E b ), durability, and ability to configure in various shapes. However, these nanocomposites suffer from a limited working temperature regime, thus limiting their extreme applications, such as hybrid and electric vehicles, aerospace power electronics, and deep ground fuel exploration. Furthermore, the E b and the electric displacement (D) of polymer nanocomposites must be simultaneously enhanced for high-density capacitor applications, which prove to be difficult to modify concurrently. This chapter thoroughly reviews (investigates) the recent developments in the high-k polymer nanocomposites synthesis, characterization, and energy storage applications. Consequently, the aim of this chapter is to provide an overview of the novel developmental strategies in order to develop high-dielectric nanocomposites perovskite ceramics that can be incorporated in high-energy-density (HED) applications.

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Section: Electrical Propertiesmentioning

confidence: 99%

High-k Polymer Nanocomposites for Energy Storage Applications

Mahmood¹,

Akhtar²,

Mahmood³

2017

Properties and Applications of Polymer Dielectrics

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“…The ceramic systems based on MgTiO 3 have always received considerable attention and applications in the literature. For example, dielectric passive components of MgTiO 3 in a communication system have been employed to be a resonator, duplex, filter, and antenna [8][9][10][11][12]. Therefore, it is considerably important to enhance the dielectric performance of MgTiO 3 .…”

Section: Introductionmentioning

confidence: 99%

The Enhanced Thermal Stability of (Mg0.95Ni0.05)2TiO4 Dielectric Ceramics Modified by a Multi-Phase Method

Shen

Hsieh

et al. 2023

Materials

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The thermal stability of (Mg0.95Ni0.05)2TiO4 dielectric ceramics has been improved by mixing with CaTiO3 phases owing to higher positive temperature coefficients. The pure (Mg0.95Ni0.05)2TiO4 and the mixture phase systems of CaTiO3-modified (Mg0.95Ni0.05)2TiO4 were verified by XRD diffraction patterns to ensure the crystallite of different phases. The microstructures of the CaTiO3-modified (Mg0.95Ni0.05)2TiO4 were observed by SEM and EDS to investigate the relation between element ratios and grains. As a result, it can be seen that the thermal stability of the CaTiO3-modified (Mg0.95Ni0.05)2TiO4 can be effectively enhanced, compared with the pure (Mg0.95Ni0.05)2TiO4. Moreover, the radio frequency dielectric performances of CaTiO3-modified (Mg0.95Ni0.05)2TiO4 dielectric ceramics are strongly dependent upon the density and the morphology of the specimens. The champion sample with the ratio of (Mg0.95Ni0.05)2TiO4 and CaTiO3 of 0.92:0.08 showed an εr value of 19.2, an Qf value of 108,200 GHz, and a τf value of −4.8 ppm/°C, which may encourage (Mg0.95Ni0.05)2TiO4 ceramics to broaden the range of novel applications and match the requirements of 5G or next-generation communication systems.

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“…Ceramic systems based on MgTiO 3 have always received considerable attention and have been used in a wide range of applications, for example, as passive components in communication systems such as dielectric resonators (DRs), filters, and antennas. Therefore, it is quite important to enhance the dielectric performance of MgTiO 3 (ε r ~17, a Qf ~160,000 GHz, τ f ~−51 ppm/ • C) [12][13][14][15][16]. It has an ilmenite-type structure and can be represented by the general formula ABO 3 .…”

Section: Introductionmentioning

confidence: 99%

The Enhanced Phase-Forming Capacity of (1–x)Mg0.95Co0.05TiO3-xCa0.6La0.8/3TiO3 Dielectric Ceramics Modified Using Multiple Sintering Aids

2023

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In this study, the phase-forming capacity of 0.9Mg0.95Co0.05TiO3-0.1Ca0.6La0.8/3TiO3 dielectric ceramics was improved by mixing multiple sintering aids (ZnO-B2O3) owing to their lower melting point. The mixed-phase systems of Ca0.6La0.8/3TiO3-modified Mg0.95Co0.05TiO3 dielectric ceramics were verified using XRD diffraction to ensure that the crystallites of different phases were present. The microstructures of the Ca0.6La0.8/3TiO3-modified Mg0.95Co0.05TiO3 dielectric ceramics were observed via SEM and EDS to investigate the relation between element ratios and grains. It was found that the phase-forming capacity of Ca0.6La0.8/3TiO3-modified Mg0.95Co0.05TiO3 was effectively enhanced, compared with the treatment that did not involve mixing multiple sintering aids (ZnO-B2O3). Additionally, the microwave dielectric performances of Ca0.6La0.8/3TiO3-modified Mg0.95Co0.05TiO3 dielectric ceramics with multiple sintering aids (ZnO-B2O3) strongly depended on the density and morphology of the specimens. When the compositions of 0.9Mg0.95Co0.05TiO3-0.1Ca0.6La0.8/3TiO3 with 1 wt% multiple sintering aids (ZnO-B2O3) showed an εr value of 22.6, a Qf value of 49,000 GHz, and a τf value of −12.8 ppm/°C, the sintering temperature was reduced from 1350 °C to 1150 °C (about 200 °C). When adding a larger amount of multiple sintering aids (ZnO-B2O3), the sintering temperature could be reduced by more than 200 °C. This study may promote the use of Ca0.6La0.8/3TiO3-modified Mg0.95Co0.05TiO3 dielectric ceramics.

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Kinetic analysis on the synthesis of Mg0.95Zn0.05TiO3 microwave dielectric ceramic by polymeric precursor method

Cited by 12 publications

References 38 publications

High-k Polymer Nanocomposites for Energy Storage Applications

High-k Polymer Nanocomposites for Energy Storage Applications

The Enhanced Thermal Stability of (Mg0.95Ni0.05)2TiO4 Dielectric Ceramics Modified by a Multi-Phase Method

The Enhanced Phase-Forming Capacity of (1–x)Mg0.95Co0.05TiO3-xCa0.6La0.8/3TiO3 Dielectric Ceramics Modified Using Multiple Sintering Aids

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