Sintering behavior and microwave dielectric properties of Sr2CeO4 ceramics doped with Li2CO3-Bi2O3

Zhou, Fuming; Wang, Hao; Guo, Jianming; Yang, Hui; Li, Lingfeng; Zhang, Qilong

doi:10.1007/s10854-020-04682-z

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…The melting point of Li 2 CO 3 is ∼720 °C, lower than the temperature used (∼900 °C) for making NMC. 16 In flux methods, usually a large amount of excess molten salt flux is used. The melting of lithium salt promotes the crystal growth during heating, leading to large primary particles.…”

Section: Resultsmentioning

confidence: 99%

Li[Ni_0.6Mn_0.2Co_0.2]O₂ Made From Crystalline Rock Salt Oxide Precursors

Tahmasebi

Zheng²,

Hatchard³

et al. 2023

J. Electrochem. Soc.

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Layered lithium nickel manganese cobalt oxide or NMC type cathode materials dominate the lithium-ion battery market. However, the production of their precursor involves the use of large amounts of water and can create waste. All-dry synthesis methods are attractive as they are potentially cheaper and greener. However, it remains a challenge to achieve atomic scale mixing of the precursor elements by dry methods. Here, we report an alternate route to achieve atomic scale mixing by employing thermal interdiffusion to produce a phase pure rock salt structure precursor for NMC cathode materials, which can significantly shorten the preparation time and may further reduce cost. The complications and applicability of using a thermally synthesized precursor to make layered cathode material are presented in detail.

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Section: Resultsmentioning

confidence: 99%

Li[Ni_0.6Mn_0.2Co_0.2]O₂ Made From Crystalline Rock Salt Oxide Precursors

Tahmasebi

Zheng²,

Hatchard³

et al. 2023

J. Electrochem. Soc.

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“…A variety of core-shell structures were prepared, including AgNWs@SiO 2 [24], Al@SiO 2 [25], BN@AgNPs [26], and introduced into the polymer matrix to improve the performance of composites. In our previous work, Sr 2 CeO 4 with excellent properties (ε r = 14.49, Q × f = 120,886 GHz) was prepared by solid-phase sintering [27]. However, when exposed to the air for a long time, the powders tend to absorb water and form agglomerates.…”

Section: Introductionmentioning

confidence: 99%

Core-Shell Sr2CeO4@SiO2 Filled COC-Based Composites with Low Dielectric Loss for High-Frequency Substrates

Wang

Zhang³

et al. 2021

Polymers

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High-frequency communication equipment urgently needs substrate materials with lower dielectric loss, better heat dissipation, and higher stability, to ensure real-time low-loss and high-speed signal transmission. The core-shell structure of Sr2CeO4@SiO2 was prepared by the sol-gel method, and the modified powders with different volume contents were introduced into the cyclic olefin copolymer (COC) to prepare hydrocarbon resin-based composites. Due to the protective effect of the SiO2 shell, the stability of the powders is significantly improved, and the moisture barrier and corrosion resistance of the composites are enhanced, which is conducive to the normal operation of electronic equipment in harsh and complex environments. When the filler content is 20 vol%, the composite has a dielectric loss of 0.0023 at 10 GHz, a dielectric constant of 3.5, a thermal conductivity of 0.9 W·m−1·K−1, a water absorption of 0.32% and a coefficient of thermal expansion of 37.7 ppm/°C. The COC/Sr2CeO4@SiO2 composites exhibit excellent dielectric properties and thermal conductivity, while maintaining good moisture resistance and dimensional stability, which shows potential application prospects in the field of high-frequency substrates.

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Structure refinement, defects evolution and calcium doping of Sr2CeO4 microwave dielectric ceramics with high quality factor

Zhang

Fan

Hou

et al. 2022

Ceramics International

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Sintering behavior and microwave dielectric properties of Sr2CeO4 ceramics doped with Li2CO3-Bi2O3

Cited by 5 publications

References 32 publications

Li[Ni_0.6Mn_0.2Co_0.2]O₂ Made From Crystalline Rock Salt Oxide Precursors

Li[Ni_0.6Mn_0.2Co_0.2]O₂ Made From Crystalline Rock Salt Oxide Precursors

Core-Shell Sr2CeO4@SiO2 Filled COC-Based Composites with Low Dielectric Loss for High-Frequency Substrates

Structure refinement, defects evolution and calcium doping of Sr2CeO4 microwave dielectric ceramics with high quality factor

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Sintering behavior and microwave dielectric properties of Sr2CeO4 ceramics doped with Li2CO3-Bi2O3

Cited by 5 publications

References 32 publications

Li[Ni0.6Mn0.2Co0.2]O2 Made From Crystalline Rock Salt Oxide Precursors

Li[Ni0.6Mn0.2Co0.2]O2 Made From Crystalline Rock Salt Oxide Precursors

Core-Shell Sr2CeO4@SiO2 Filled COC-Based Composites with Low Dielectric Loss for High-Frequency Substrates

Structure refinement, defects evolution and calcium doping of Sr2CeO4 microwave dielectric ceramics with high quality factor

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Product

Resources

About

Li[Ni_0.6Mn_0.2Co_0.2]O₂ Made From Crystalline Rock Salt Oxide Precursors

Li[Ni_0.6Mn_0.2Co_0.2]O₂ Made From Crystalline Rock Salt Oxide Precursors