Microstructure and Microwave Dielectric Properties of Modified Zinc Titanates (II)

Kim, H.T.; Byun, Jae Dong; Kim, Y.

doi:10.1016/s0025-5408(98)00057-9

Cited by 102 publications

(68 citation statements)

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“…Hexagonal ZnTiO 3 phase has been reported to be maintained below 945°C [13]. Actually, according to Kim's reports [3,4], the decomposition of ZnTiO 3 starts at about 900°C and completes near 945°C. So, it was concluded that the addition of 1 wt% V 2 O 5 lowered the temperature of phase transition from hexagonal ZnTiO 3 to cubic Zn 2 TiO 4 .…”

Section: Resultsmentioning

confidence: 98%

“…These two approaches are combined in the third class, which uses ceramics with relatively low sintering temperatures (1,100-1,150°C) and adds small amount of glass or sintering aids into ceramics. In this paper, zinc titanates (ZnTiO 3 ) system was chosen as a host material because of its low sintering temperature (1,150°C) and promising dielectric properties [3][4][5]. However, its sintering temperature is still higher than the melting temperature of Ag (961°C) and Cu (1,064°C) used as inner electrodes of LTCCs.…”

Section: Introductionmentioning

confidence: 99%

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Effects of V2O5 addition on the phase-structure and dielectric properties of zinc titanate ceramics

et al. 2007

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V 2 O 5 -doped zinc titanate ceramics (ZnTiO 3 ) were prepared by conventional mixed-oxide method combined with a semi-chemical processing. The effects of V 2 O 5 addition on the phase-structures and the dielectric properties of ZnTiO 3 ceramics were investigated. The results show the sintering temperature of zinc titanate ceramics could be lowered from 1,150 to 930°C by reducing the size of starting powders using a semi-chemical processing; and with adding V 2 O 5 addition, the densification temperature of ZnTiO 3 ceramics could be reduced to 875°C. Also the phase transition temperature from hexagonal ZnTiO 3 phase to cubic Zn 2 TiO 4 was lowered by adding V 2 O 5 . The best properties were: ɛ r =20.6, Q Â f ¼ 8; 873 GHz, when the ceramics was sintered at 900°C, which is a promising candidate in the field of multi-layer devices requiring low sintering temperature (≤900°C).

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Effects of V2O5 addition on the phase-structure and dielectric properties of zinc titanate ceramics

et al. 2007

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“…Three compounds exist in the ZnO-TiO 2 system: Zn 2 TiO 4 (cubic), ZnTiO 3 (hexagonal), and Zn 2 Ti 3 O 8 (cubic). This system has great potential application for lowtemperature sintering dielectrics [4]. In the cubic form, it has been used as a dielectric: as one component in dielectric compositions.…”

Section: Introductionmentioning

confidence: 99%

“…In the cubic form, it has been used as a dielectric: as one component in dielectric compositions. Microwave dielectric properties of zinc titanates with different Zn/Ti ratios and with MgO addition were studied in detail by Kim et al [4], while Zhang et al [5] studied the sintering and microwave dielectric properties of LTCC zinc titanate multilayers. Zinc titanate in hexagonal form doped with magnesium was studied in detail in [6] in view of its microwave dielectric properties and possible applications.…”

Section: Introductionmentioning

confidence: 99%

Structural analysis of Zn2TiO4 doped with MgO

Nikolić¹,

Obradović

Paraskevopoulos

et al. 2009

Powder Metall Met Ceram

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UDC 621.762The starting mixtures of ZnO, TiO 2 , and MgO (0, 1.25, and 2.5 wt.%) powders are mechanically activated in a high-energy planetary mill for 15 min and then sintered between 800 and 1100°C for 2 h. The influence of MgO addition on the structure of the samples obtained is analyzed with X-ray diffraction and infrared reflection spectroscopy. Room-temperature far-infrared reflectivity spectra of the samples doped with MgO (0, 1.25, and 2.5 wt.%) and sintered at 1100°C in the frequency range between 100 and 1200 cm -1 are measured and analyzed. Optical parameters are determined for seven oscillators belonging to the spinel structure using the four-parameter model of coupled oscillators. Born effective charges are calculated from the transversal/longitudinal splitting.

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“…In the last few decades, these materials have also been used as dielectric materials for microwave devices and, more preferably, for low-temperature co-fired ceramics (LTCC) [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Analysis of nonisothermal sintering of zinc-titanate ceramics doped with MgO

Obradović

Stevanović

Ristić

2008

Powder Metall Met Ceram

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621.762.5.666 The aim of this work is to analyze nonisothermal sintering of zinc titanate ceramics doped with MgO obtained by mechanical activation. Mixtures of ZnO, TiO 2 , and MgO (0, 1.25,and 2.5%) are mechanically activated for 15 min in a planetary ball mill. Nonisothermal sintering is performed in air for 120 min at 800, 900, 1000, and 1100°C. Microstructure parameters are revealed from an approximation method. Structural characterization of ZnO-TiO 2 -MgO system after milling is performed at room temperature using XRPD measurements. The main conclusions are that mechanical activation leads to the particle size reduction, the increase of dislocation density, and lattice strain. Doped zinc titanate samples achieve higher densities after sintering and the diffusion mechanism is dominant during the sintering process.

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Microstructure and Microwave Dielectric Properties of Modified Zinc Titanates (II)

Cited by 102 publications

References 4 publications

Effects of V2O5 addition on the phase-structure and dielectric properties of zinc titanate ceramics

Effects of V2O5 addition on the phase-structure and dielectric properties of zinc titanate ceramics

Structural analysis of Zn2TiO4 doped with MgO

Analysis of nonisothermal sintering of zinc-titanate ceramics doped with MgO

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