Preparation and structural study of Mg1−x Zn x TiO3 ceramics and their dielectric properties from 1 Hz to 7.7 GHz

Ermawati, Frida Ulfah; Pratapa, Suminar; Suasmoro, S.; Hübert, Thomas; Banach, Ulrich

doi:10.1007/s10854-016-4610-6

Cited by 22 publications

(22 citation statements)

References 20 publications

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“…The liquid solutions were then used to produce crystalline powder by mixing the solutions together homogeneously and heating it. This particular synthesis method has successfully produced MgTiO3-and the other ilmenite type-based ceramic dielectric materials [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. This paper reports the work to synthesize Ilmenite FeTiO3 nanopowder using the liquid-mixing method.…”

Section: Introductionmentioning

confidence: 99%

Phase Formation, Structural, and Microstructural Characterizations of Ilmenite FeTiO₃Nanopowder Prepared from Liquid-Mixing Method

Ermawati

2022

J. Phys.: Conf. Ser.

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Ilmenite FeTiO3 is a wide-band gap antiferromagnetic semiconductor material and has very potential for applications in spintronic devices. Miniaturization of microelectronics and communication systems has become a necessity. Thus a material that can achieve high antiferromagnetic semiconductor properties in a small volume is therefore favourite. For that reason, particles of the materials must also be in the nanoscale. This paper reports the synthesis of nano-sized Ilmenite FeTiO3 powder using the liquid-mixing method. Using this method, FeTiO3 crystalline phase was initially formed at a temperature as low as 340 °C. The phase formation was analyzed from room temperature to 600 °C based on TGA/DTA, FTIR and XRD data. Rietveld's analysis stated that 84 % molar FeTiO3 phase was formed at 340 °C, and the rest was TiO2 rutile. By using the Scherrer method, the average crystallite size was calculated to be 38-43 nm, while the TEM data provides grain sizes of 20-40 nm.

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Section: Introductionmentioning

confidence: 99%

Phase Formation, Structural, and Microstructural Characterizations of Ilmenite FeTiO₃Nanopowder Prepared from Liquid-Mixing Method

Ermawati

2022

J. Phys.: Conf. Ser.

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“…To support this industry, dielectric materials are required to be used as electronic components. Wu (2013), Zhang (2012), Ermawati (2016), Rani (2016) and Zhang et al (2018) reported that dielectric material ceramics based magnesium titanate (MgTiO 3 ) has the potential to be applied to satellite and cellular telecommunication systems operating at a microwave frequency 3-300 GHz. One of the applications is as a dielectric resonator oscillator (DRO) material (Ermawati, 2020a;Ermawati, 2020b).…”

Section: Introductionmentioning

confidence: 99%

“…Fabrication of (Mg 1-x Zn x )TiO 3 ceramics has currently been reported, i.e., some of them are by Ermawati et al (2016), Rettiningtyas et al (2020, Rostianbudi et al (2020), andZendya et al (2020). Ermawati et al (2016) reported the ceramics' dielectric properties and their relation to the structure, microstructure and density. The rest publications reported the effect of Bi 2 O 3 addition into the structure, microstructure and bulk density of (Mg 1-x Zn x )TiO 3 ceramics.…”

Section: Introductionmentioning

confidence: 99%

Characterization of (Mg1.0Zn0.0)TiO3+4 wt%Bi2O3 Ceramics for Application as Resonator in Dielectric Resonator Oscillator Circuit

Izza

Ermawati

2021

JIF

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MgTiO3-based ceramics have potential applications in telecommunications systems at microwave frequencies, such as resonators in dielectric resonator oscillator (DRO) circuits. This paper reports the results of (Mg1.0Zn0.0)TiO3+4wt% Bi2O3 (abbreviated MZT0+4wt%Bi2O3) ceramic fabrication to assess its potential to be used as a resonator in the DRO circuit. We characterized its structure, microstructure, and bulk density. The addition of 4wt%Bi2O3 to MZT0 crystalline powder was carried out via ball-mill. The milled powder was compacted using a die press to obtain pellets. All pellets were sintered at 1100ºC for 4, 6, and 8 h. Ceramic structures of the 4 and 6 h holding time consists of MgTiO3 phase (94.33±2.68) and (95.34±1.95)% molar respectively, while the rest phase was TiO2. The 8-h ceramic structure comprises (96.11±2.94) % molar MgTiO3 accompanied by Mg2TiO5 and TiO2. The ceramics' microstructure consists of a cluster of grains with an average diameter of 1.32-2.24 μm and pores. Bulk density decreases with the increase of sintering holding time. The DRO characterization records a resonance signal each at 5.207, 5.005, and 5.121GHz with power approaching 0 dBm, suggesting that the MZT0+4wt%Bi2O3 ceramics can be used as a resonator in the DRO circuit working in microwave frequencies, especially at 5.0-5.2GHz.

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“…Bahan keramik dielektrik berbasis magnesium titanate (MgTiO3) banyak digunakan sebagai filter, osilator, resonator, dan radar untuk sistem komunikasi pada frekuensi gelombang mikro (Ermawati et al, 2016;Wu et al, 2013). MgTiO3 dilaporkan memiliki nilai permitivitas relatif tinggi (ɛr ~ 17), faktor kualitas tinggi (Q x f ~ 91.000 pada frekuensi 8,2 GHz), dan nilai τf (-50 ppm/ o C) (Huang et al, 2015) sehingga dapat digunakan dalam aplikasi sistem komunikasi gelombang mikro tersebut (Zhang et al, 2012).…”

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FABRIKASI KERAMIK (Mg0,6Zn0,4)TiO3+x wt.% Bi2O3 HASIL SINTESIS DENGAN METODE PENCAMPURAN LARUTAN DAN PENGARUH VARIASI x wt.% Bi2O3 TERHADAP STRUKTUR DAN DENSITAS KERAMIK

Nisa’,

Ermawati

2020

IFI

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Abstrak Keramik berbasis MgTiO3 banyak dilaporkan sebagai bahan yang berpotensi untuk aplikasi sistem komunikasi pada frekuensi gelombang mikro. Pada artikel ini dilaporkan hasil fabrikasi keramik (Mg0,6Zn0,4)TiO3 (MZT04) + x wt.% Bi2O3 (x = 0, 1 dan 5) dan dikaji pengaruhnya terhadap struktur dan densitasnya. Fabrikasi ketiga keramik tersebut diperoleh dari serbuk hasil sintesis dengan metode pencampuran larutan menggunakan bahan awal serbuk logam Mg, Zn, dan Ti (Merck) serta HCl 12 M dan dikalsinasi pada suhu 550 ℃ selama 2 jam. Pencampuran Bi2O3 dilakukan dengan proses ball milling dan kompaksi dengan tekanan 10 MPa kemudian disinter pada suhu 1000 ℃ selama 4 jam. Analisis struktur dengan uji XRD menunjukkan bahwa serbuk MZT04 terdiri dari fasa MgTiO3 sebagai fasa utama dan TiO2 sebagai fasa impuritas. Sedangkan untuk keramik dengan penambahan 0, 1 dan 5 wt.% Bi2O3 terdiri dari fasa MgTiO3 sebagai fasa utama dengan % molar = (96,47 ± 2,95), (96,79 ± 1,79) dan (97,53 ± 1,88) dan sisanya MgO sebagai fasa impuritas. Bertambahnya wt.% Bi2O3 menyebabkan penurunan % molar fasa MgO, memperkecil ukuran parameter kisi dan volume sel satuan. Fakta tersebut didukung dengan terjadinya pergeseran posisi 2θ puncak MgTiO3 (104) dari 32,86 menjadi 33,02°. Penambahan wt.% Bi2O3 tersebut juga mampu meningkatkan densitas Archimedes dari 3,315 menjadi 3,762 g/cm3. Dapat disimpulkan bahwa variasi penambahan 0, 1 dan 5 wt.% Bi2O3 pada keramik MZT04 berpengaruh terhadap struktur dan densitasnya, yaitu menyebabkan pembentukan fasa MgTiO3 hampir tunggal, memperkecil ukuran parameter kisi dan volume sel satuan serta meningkatkan nilai densitas Archimedes. Kata Kunci: (Mg0,6Zn0,4)TiO3, wt.% Bi2O3, keramik, struktur, densitas Archimedes Abstract MgTiO3-based ceramics are widely reported as potential materials for communication system applications at microwave frequencies. In this article, the ceramic fabrication of (Mg0.6Zn0.4)TiO3 (MZT04) + x wt.% Bi2O3 (x = 0, 1 and 5) were examined and their effects on structure and density were reported. Fabrication of the three ceramics was obtained from the powder synthesized by liquid mixing method from Mg, Zn, and Ti (Merck) metal powder as well as 12 M HCl and calcined at 550 ℃ for 2 hours. Bi2O3 mixing was carried out by ball milling and compacting with a pressure of 10 MPa and sintered at 1000 ℃ for 4 hours. Analysis of the structure by XRD showed that MZT04 powders consisted of the MgTiO3 phase as the main phase and TiO2 as the impurity phase. While for the ceramics with 0, 1 and 5 wt.% Bi2O3, the samples consist of MgTiO3 phase as the main phase with % molar = (96.47 ± 2.95), (96.79 ± 1.79) and (97.53 ± 1.88) and the remaining MgO as an impurity phase. The increase in % wt Bi2O3 causes a decrease in the presence of the MgO phase, reducing the size of the lattice parameter and the volume of unit cells. This fact was supported by the shifting of of the (104) MgTiO3 peak from 2θ = 32.86 to 33.02°. The addition of wt.% Bi2O3 was also able to increase the Archimedes density from 3.315 to 3.762 g/cm3. It can be concluded that the variation of 0, 1 and 5 wt.% Bi2O3 into MZT04 ceramic systems affects the structure and density of the systems, i.e. leads to the formation of nearly single phase of MgTiO3, reducing the size of the lattice parameter and the volume of unit cells and increasing the Archimedes density. Keywords: (Mg0,6Zn0,4)TiO3, wt.% Bi2O3, ceramics, structure, Archimedes density

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Preparation and structural study of Mg1−x Zn x TiO3 ceramics and their dielectric properties from 1 Hz to 7.7 GHz

Cited by 22 publications

References 20 publications

Phase Formation, Structural, and Microstructural Characterizations of Ilmenite FeTiO₃Nanopowder Prepared from Liquid-Mixing Method

Phase Formation, Structural, and Microstructural Characterizations of Ilmenite FeTiO₃Nanopowder Prepared from Liquid-Mixing Method

Characterization of (Mg1.0Zn0.0)TiO3+4 wt%Bi2O3 Ceramics for Application as Resonator in Dielectric Resonator Oscillator Circuit

FABRIKASI KERAMIK (Mg0,6Zn0,4)TiO3+x wt.% Bi2O3 HASIL SINTESIS DENGAN METODE PENCAMPURAN LARUTAN DAN PENGARUH VARIASI x wt.% Bi2O3 TERHADAP STRUKTUR DAN DENSITAS KERAMIK

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Preparation and structural study of Mg1−x Zn x TiO3 ceramics and their dielectric properties from 1 Hz to 7.7 GHz

Cited by 22 publications

References 20 publications

Phase Formation, Structural, and Microstructural Characterizations of Ilmenite FeTiO3Nanopowder Prepared from Liquid-Mixing Method

Phase Formation, Structural, and Microstructural Characterizations of Ilmenite FeTiO3Nanopowder Prepared from Liquid-Mixing Method

Characterization of (Mg1.0Zn0.0)TiO3+4 wt%Bi2O3 Ceramics for Application as Resonator in Dielectric Resonator Oscillator Circuit

FABRIKASI KERAMIK (Mg0,6Zn0,4)TiO3+x wt.% Bi2O3 HASIL SINTESIS DENGAN METODE PENCAMPURAN LARUTAN DAN PENGARUH VARIASI x wt.% Bi2O3 TERHADAP STRUKTUR DAN DENSITAS KERAMIK

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Phase Formation, Structural, and Microstructural Characterizations of Ilmenite FeTiO₃Nanopowder Prepared from Liquid-Mixing Method

Phase Formation, Structural, and Microstructural Characterizations of Ilmenite FeTiO₃Nanopowder Prepared from Liquid-Mixing Method