Phase Formation and Dielectric Characterization of the Bi2O3–TeO2 System Prepared in an Oxygen Atmosphere

Udovic, M.; Valant, Matjaž; Suvorov, Danilo

doi:10.1111/j.1551-2916.2004.00591.x

Cited by 124 publications

(105 citation statements)

References 20 publications

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“…Based on the above observations, tellurates began to enter the LTCC area due to very low sintering temperature, such as Bi 2 O 3 -TeO 2 , ZnO-TeO 2 and BaO-TeO 2 [21][22][23][24]. For Bi 2 O 3 -TeO 2 systems, Bi 2 Te 2 O 8 with lowest sintering temperature of 650°C exhibited a dielectric constant of 39, a quality factor of 23,000 accompanied with a negative temperature coefficient of -43 ppm/°C after soaking 10 h at the sintering temperature.…”

Section: Materials With Original Low Sintering Temperaturementioning

confidence: 96%

Ultra-low sintering temperature ceramics for LTCC applications: a review

Liu

Zhang

et al. 2015

J Mater Sci: Mater Electron

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During past over 30 years, low temperature cofired ceramic (LTCC) technology has been developed to meet with the requirements of small, light weight and multifunctional electronic components through enabling fabrication of three-dimensional ceramic modules with low dielectric loss and embedded silver electrode. A recent technology is to develop new dielectrics with ultra-low sintering temperature (usually \650°C) to save energy, reduce processing time, and to enable further integrations with semiconductors, metals or even plastics. In this review, we summarized the materials with ultra-low sintering temperature developed in past over 10 years, which will be helpful for those researchers to not only develop new materials but also improve all technologies in ultra-LTCC fields.

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Section: Materials With Original Low Sintering Temperaturementioning

confidence: 96%

Ultra-low sintering temperature ceramics for LTCC applications: a review

Liu

Zhang

et al. 2015

J Mater Sci: Mater Electron

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“…Therefore, a glass-free LTCC material with appropriate microwave dielectric properties is strongly desired for the multilayer structure applications. Recently a number of tellurium-based low temperature fired microwave dielectrics have been reported [10][11][12][13][14][15]. However, a small amount of these materials reacted with silver electrode, which prevents their LTCC applications.…”

Section: Introductionmentioning

confidence: 99%

Glass-free LTCC microwave ceramic-Ca1−x(La0.5Na0.5)xWO4

Fan

Bian

2014

J Mater Sci: Mater Electron

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The structure and microstructure of the Ca 1-x (La 0.5 Na 0.5 ) x WO 4 (0.1 B x B 1.0) ceramics were investigated using X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) method. The microwave dielectric properties of the ceramics were studied with a network analyzer at the frequency of about 10-14 GHz. Continuous solid solutions Ca 1-x (La 0.5 Na 0.5 ) x WO 4 (0.1 B x B 1.0) with Scheelite structure (space group: I4 1 /a) could be densified at 850°C/2 h. The dielectric permittivity increased slightly with the increase in substitution amount. The Q 9 f value decreased with the increase of x up to x = 0.5, and then increased with further increase of x. The Q 9 f value increased when the sintering temperature increased from 850 to 950°C for the x \ 0.5 compositions, whereas it decreased with the increase in sintering temperature for the x [ 0.5 compositions. The s f value changed a little with the variation of x. All samples exhibited negative s f values. Addition of 30 mol% TiO 2 to the x = 0.9 composition improved the s f to -9.3 ppm/°C with e r = 14.4 and Q 9 f = 14,255 GHz after sintering at 850°C/2 h. The chemical compatibility of Ca 0.1 (La 0.5 Na 0.5 ) 0.9 WO 4 ? 30 mol% TiO 2 composite with silver (Ag) powders was also investigated. The composite showed inert behavior with Ag when cofired at 875°C for 2 h. However small amount of Na 0.86 WO 3 impurity phase was detected in the co-fired specimen.

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“…The low sintering temperatures of these materials mainly originate from the low low-melting constituents, such as V 2 O 5 [9,10], TeO 2 [11,12], Bi 2 O 3 [13,14], Li 2 O [15,16], WO 3 [17,18], etc. In our previous work, the microwave dielectric properties of several garnet vanadates with a general formula A 3 B 2 V 3 O 12 , such as NaCa 2 Mg 2 V 3 O 12 [19], LiCa 3 MgV 3 O 12 [9], and Li 1+2x Mg 4-2x V 3 O 12 [20], were characterized.…”

Section: Introductionmentioning

confidence: 99%