Effects of the Bi2O3-SiO2 addition on the sintering behavior and microwave dielectric properties of Zn1.8SiO3.8 ceramics

Weng, Zhangzhao; Aminirastabi, Habibollah; Xiong, Zhao Xian; Han, Xue

doi:10.1016/j.jallcom.2017.07.252

Cited by 17 publications

(5 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…9,[36][37][38] Additionally, employing non-stoichiometric ratios in traditional solid-state methods effectively eliminates the second phase ZnO. [39][40][41] Zn 1.8 SiO 3.8 ceramics exhibit excellent microwave performance when sintered at 1 300 • C, with ε r = 6.6, Q×f = 147 000 GHz and τ f = −22 ppm/ • C. 42 On the other hand, the high sintering temperature and large temperature coefficient are the main barriers. The high sintering temperature can be lowered by adding sintering aids such as glass powders or low-melting-point oxides but at the expense of the quality factor.…”

Section: Introductionmentioning

confidence: 99%

“…Using the sol–gel method allows obtaining pure‐phase Zn 2 SiO 4 powder below 100 nm, with a high Q × f value of up to 198 400 GHz 9,36–38 . Additionally, employing non‐stoichiometric ratios in traditional solid‐state methods effectively eliminates the second phase ZnO 39–41 . Zn 1.8 SiO 3.8 ceramics exhibit excellent microwave performance when sintered at 1 300°C, with ε r = 6.6, Q × f = 147 000 GHz and τ f = −22 ppm/°C 42 …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phase purifying and dielectric improvement in Zn₂SiO₄ ceramics via simply controlling the particle size of SiO₂

Xing,

Song,

Pan

2024

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

The zinc orthosilicate, Zn2SiO4 ceramics, exhibit great potential as microwave dielectric materials due to their low dielectric constant and ultrahigh quality factor. The solid‐state synthesis of Zn2SiO4 ceramics often results in the presence of a secondary phase of ZnO, however, leading to significantly lower Q×f values. Cold‐isostatic‐pressing (CIP) and nonstoichiometry have been proven effective in purifying the Zn2SiO4 but need elaborate process and composition manipulation. In this work, it was found that the particle size of SiO2 plays a crucial role in purifying the Zn2SiO4 phase. Specially, nano‐sized SiO2 particles (15 and 30 nm) led to the formation of a ZnO secondary phase in synthesized Zn2SiO4 ceramics, while micro‐sized (2 and 10 µm) resulted in pure‐phase Zn2SiO4 with excellent microwave properties. Notably, when prepared with 10 µm SiO2 and sintered at 1 340°C, the resulting Zn2SiO4 exhibited outstanding microwave performances with a Q×f value of 122 570 GHz, a temperature coefficient of frequency τf of −51.9 ppm/°C, and a dielectric constant (εr) of 6.5. These findings highlight the importance of controlling particle size during synthesis to achieve desired material properties such as purity and excellent microwave performances.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phase purifying and dielectric improvement in Zn₂SiO₄ ceramics via simply controlling the particle size of SiO₂

Xing,

Song,

Pan

2024

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

show abstract

“…7,8 Bi 2 O 3 is a potential electrolyte material with a high ionic conductivity and low melting point of about 825 • C. 1 Thus, the Bi 2 O 3 can potentially lower the operation temperature due to the improved oxygen ionic conductivity and lower the sintering temperature by a liquid-phase-assisted sintering process. [9][10][11] In terms of this advantage, adding the Bi 2 O 3 into YSZ material is a possible method to break barriers of high sintering and operation temperature of YSZ in real application. Admittedly, the risk that the Bi 2 O 3 may be reduced to Bi by H 2 existing at the anode of SOFC.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of γ‐Bi ₂ O ₃ /YSZ composite powders using a facile precipitation method

Tian

Jia

Zhang

et al. 2022

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Low melting point and high ionic conductivity of γ-Bi 2 O 3 make it a promising additive to decrease the sintering and operation temperatures of yttria stabilized zirconia (YSZ)-based electrolyte for solid oxide fuel cell application. Herein, γ-Bi 2 O 3 /YSZ composite powders with good uniformity and precise control of morphology and phase were successfully synthesized via a low cost chemical precipitation method. Both the concentration of NaOH solution and the reactant adding sequence affect the morphology and synthesis of γ-Bi 2 O 3 /YSZ composite powders. When the concentration of NaOH was in the range of 1.25-1.875 M, tetrahedron γ-Bi 2 O 3 /YSZ powders were synthesized. While, cubic structural γ-Bi 2 O 3 /YSZ powders were obtained when adding Bi 3+ and YSZ suspension into 1.5 M NaOH solution. The addition of YSZ facilitates the fabrication of γ-Bi 2 O 3 and widens its process window to a higher NaOH concentration. Thus synthesized γ-Bi 2 O 3 /YSZ composite powders effectively decrease the sintering temperature of YSZ to 1050 • C due to the uniform distribution of γ-Bi 2 O 3 inside YSZ powders. This work provides a facile method to fabricate γ-Bi 2 O 3 /YSZ composite powder with controlled morphology and phase, which will promote the mass production of low cost YSZ-based electrolyte for SOFC applications.

show abstract

“…Most of these ceramics require high sintering temperature, which can be a factor that hinders the integration of them into an electronic circuit [5]. Therefore, low temperature co-fired ceramics (LTCC) were developed by adding low quantities of melting temperature oxides, such as Bi 2 O 3 [6,7], B 2 O 3 [8] , TeO 2 [9][10][11] , V 2 O 5 [11] , among others [12][13][14], which allows the sintering process below 950 °C.…”

Section: Introductionmentioning

confidence: 99%

Effect of Bi2O3-B2O3 as a Sintering aid in Microstructure and Dielectric Properties of Fe2Mo3O12 Electroceramic.

Araújo¹,

Silva²,

Pereira³

et al. 2020

Preprint

View full text Add to dashboard Cite

Molybdates from A2Mo3O12 family have been widely investigated due to its low sintering temperature, low thermal expansion coefficient, and low dielectric loss. Fe2Mo3O12 (FMO) is an oxide from this family and widely used in the catalytic field. The aim of this work is to evaluate the influence of the Bi2O3-B2O3 as a sintering aid in the microstructure and dielectric properties of FMO. The diffraction results showed that the FMO with the monoclinic structure phase was obtained after the calcination process (650 °C). Mössbauer spectroscopy showed the formation of Fe2O3 after the sintering process at 800 °C. The scanning electron-microscopic demonstrates an increase of the grain as a function of sintering aid concentration. The samples were analyzed by using the impedance spectroscopy at radiofrequency with temperature variation. The Nyquist diagram obtained in this temperature range was fitted from an equivalent circuit with three R-CPE associations, corresponding to the morphology of the electroceramics. For dielectric properties in the microwave, all the samples showed values of εr lower than 10. Values of Q x f above 14132.35 GHz were achieved. The thermal stability was evaluated by the temperature coefficient of resonant frequency (τf). The lowest τf values of -6.55 ppm/°C and -4.35 ppm/°C (near-zero) were measured to FMO and FMO mixed with 7.5 wt% Bi2O3-B2O3, respectively. Based on these results, FMO can be used to low permittivity ceramic for low temperature co-fired ceramics (LTCC) applications, antenna substrate, and millimeter-wave range.

show abstract

Effects of the Bi2O3-SiO2 addition on the sintering behavior and microwave dielectric properties of Zn1.8SiO3.8 ceramics

Cited by 17 publications

References 23 publications

Phase purifying and dielectric improvement in Zn₂SiO₄ ceramics via simply controlling the particle size of SiO₂

Phase purifying and dielectric improvement in Zn₂SiO₄ ceramics via simply controlling the particle size of SiO₂

Synthesis of γ‐Bi ₂ O ₃ /YSZ composite powders using a facile precipitation method

Effect of Bi2O3-B2O3 as a Sintering aid in Microstructure and Dielectric Properties of Fe2Mo3O12 Electroceramic.

Contact Info

Product

Resources

About

Effects of the Bi2O3-SiO2 addition on the sintering behavior and microwave dielectric properties of Zn1.8SiO3.8 ceramics

Cited by 17 publications

References 23 publications

Phase purifying and dielectric improvement in Zn2SiO4 ceramics via simply controlling the particle size of SiO2

Phase purifying and dielectric improvement in Zn2SiO4 ceramics via simply controlling the particle size of SiO2

Synthesis of γ‐Bi 2 O 3 /YSZ composite powders using a facile precipitation method

Effect of Bi2O3-B2O3 as a Sintering aid in Microstructure and Dielectric Properties of Fe2Mo3O12 Electroceramic.

Contact Info

Product

Resources

About

Phase purifying and dielectric improvement in Zn₂SiO₄ ceramics via simply controlling the particle size of SiO₂

Phase purifying and dielectric improvement in Zn₂SiO₄ ceramics via simply controlling the particle size of SiO₂

Synthesis of γ‐Bi ₂ O ₃ /YSZ composite powders using a facile precipitation method