Synthesis and properties of TiO2 added NiNb2O6 microwave dielectric ceramics using a simple process

Liou, Yi-Cheng; Shiue, Chao-Yang; Weng, Min‐Hang

doi:10.1016/j.jeurceramsoc.2008.08.022

Cited by 27 publications

(18 citation statements)

References 21 publications

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“…The sintering temperature and density were 1275 ˚C and 5.603g/cm 3 (>99.5% theoretic density) respectively which are more or less the same with those reported by Liou et al [7] and Butee et al [21] and higher density than Lee et al [6].…”

Section: Solid State Synthesissupporting

confidence: 87%

“…However, Lee et al [6] got the highest quality factor Q×ƒ value 40100 GHz and the lowest sintering temperature 1150 ˚C with only 95% theoretic density which was lack of explanation. In this research, the quality factor Q×ƒ value for NiNb 2 O 6 reached 37500GHz which was nearly double more than those reported by Pullar et al [20], Liou et al [7] and Butee et al [21], and get closed to the result of Lee et al [6]. The dielectric constant was 22.1 and the temperature coefficient of resonant frequency was small negative as -30.4 ppm/˚C.…”

Section: Solid State Synthesismentioning

confidence: 37%

“…The bulk densities of the sintered ceramics were measured by Archimedes method using deionized water as the liquid. The microwave dielectric properties of sintered samples at microwave frequency (6)(7)(8) were measured with a HP8720ES network analyzer using Hakki-Coleman's dielectric resonator method, as improved by Courtney and Kobayashi et al [17][18][19].…”

Section: Methodsmentioning

confidence: 99%

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Effects of CuO additives and sol–gel technique on NiNb2O6 dielectric ceramics for LTCC application

You

Zhang

2016

J Mater Sci: Mater Electron

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The effects of CuO additives and sol-gel method synthesis on the sintering behavior, microstructure and the microwave dielectric properties of NiNb 2 O 6 ceramics were investigated systematically. The NiNb 2 O 6 ceramics were synthesized with traditional solid state method and sol-gel method, and the CuO additives were used in the solid state method for comparison. The sintering temperature of NiNb 2 O 6 ceramics with the highest densification can be effectively reduced from about 1275˚C to 1050˚C and 1100˚C respectively by using CuO additions and sol-gel technique. To study their applicability in low temperature cofired ceramic (LTCC) technology, dielectric properties have been characterized. The dielectric properties exhibited a significant dependence on the sintering condition, composition and crystal structure of the ceramics.In particular, the 2.5 wt.% CuO-doped NiNb 2 O 6 ceramics sintered at 1050˚C have excellent microwave dielectric properties: ε r =21.45, Q×ƒ=23531GHz, τ f =-27.9ppm/˚C. 2While the NiNb 2 O 6 ceramics prepared by sol-gel method obtain microwave dielectric properties as: ε r =19.16, Q×ƒ=11149GHz, τ f =-27.3ppm/˚C after sintered at 1100˚C for 2h.

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Section: Solid State Synthesissupporting

confidence: 87%

Section: Solid State Synthesismentioning

confidence: 37%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Effects of CuO additives and sol–gel technique on NiNb2O6 dielectric ceramics for LTCC application

You

Zhang

2016

J Mater Sci: Mater Electron

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“…However, with the increase of the sintering temperature and CuO content, the residual NiNb 2 O 6 phase decreased remarkably. Figure 1 shows that the NiNb 2 O 6 phase could hardly be detected and solid [11]. The SEM micrographs of 3.2 wt% CuO-doped 7NiNb 2 O 6 -9TiO 2 ceramics sintered at different temperature are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Low temperature sintering and microwave dielectric properties of 7NiNb2O6–9TiO2 ceramics with CuO addition

Gong

Guo

et al. 2011

J Mater Sci: Mater Electron

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The effects of CuO additive on sintering temperature and microwave dielectric properties of 7NiNb 2 O 6 -9TiO 2 ceramics prepared by solid-state reaction method have been investigated. The phases and microstructure have also been evaluated using X-ray diffraction and scanning electron microscopy. The pure 7NiNb 2 O 6 -9TiO 2 ceramics show a high sintering temperature of about 1,200°C. However, the addition of CuO lowered the sintering temperature of 7NiNb 2 O 6 -9TiO 2 ceramics from 1,200 to 935°C due to the CuO liquid-phase. The results showed that the microwave dielectric properties were strongly dependent on densification, crystalline phases and grain size. The 7NiNb 2 O 6 -9TiO 2 ceramics with the addition of 3.2 wt% CuO sintered at 935°C afforded excellent dielectric properties of e r = 60.5, Q 9 f = 10,039 GHz (at 3.8 GHz) and s f = 62 ppm/°C, which represented very promising candidates for LTCC dielectric materials.

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“…PMN ceramics with a density 8.09 g cm À 3 (99.5% of the theoretical value) and high dielectric constant 19900 (at 1 kHz) were obtained via reactionsintering process [16]. Reaction-sintering process had also been used to produce other complex perovskite relaxor and microwave dielectric ceramics by our group [17][18][19]. In recent studies, we prepared CuAl 0.9 Ca 0.1 O 2 and CuAl 1À x Fe x O 2 thermoelectric ceramics using reaction-sintering process [20,21].…”

Section: Introductionmentioning

confidence: 99%

Effects of Ti addition on properties of Sr2Nb2O7 thermoelectric ceramics

Liou

Tsai

et al. 2015

Ceramics International

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Synthesis and properties of TiO2 added NiNb2O6 microwave dielectric ceramics using a simple process

Cited by 27 publications

References 21 publications

Effects of CuO additives and sol–gel technique on NiNb2O6 dielectric ceramics for LTCC application

Effects of CuO additives and sol–gel technique on NiNb2O6 dielectric ceramics for LTCC application

Low temperature sintering and microwave dielectric properties of 7NiNb2O6–9TiO2 ceramics with CuO addition

Effects of Ti addition on properties of Sr2Nb2O7 thermoelectric ceramics

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