Temperature stability and high-Qf of low temperature firing Mg2SiO4–Li2TiO3 microwave dielectric ceramics

Lai, Yuanming; Hong, Caiyun; Li, Jin; Tang, Xiaoli; Zhang, Huaiwu; Huang, Xin; Li, Jie; Su, Hua

doi:10.1016/j.ceramint.2017.08.192

Cited by 34 publications

(14 citation statements)

References 30 publications

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“…Figure c displayed the high resolution Ti 2p spectrum of C@LTSO/CNT. The binding energies at 459.1 and 464.6 eV, respectively, corresponded to Ti 4+ 2p 3/2 and Ti 4+ 2p 1/2 with an energy separation (▵Ti) of 5.5 eV, which was matched with previous reported spectrum of LTSO . Figure d exhibited the high resolution Si 2p spectrum of C@LTSO/CNT.…”

Section: Resultssupporting

confidence: 83%

“…The binding energies at 459.1 and 464.6 eV, respectively, corresponded to Ti 4 + 2p 3/2 and Ti 4 + 2p 1/2 with an energy separation (~Ti) of 5.5 eV, which was matched with previous reported spectrum of LTSO. [37] Figure 2d 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 silicates, [38] respectively. Figure 2e and Figure 2f exhibited the high resolution of C1s spectrums of LTSO/CNT and C@LTSO/ CNT.…”

Section: Sample Preparation and Characterizationmentioning

confidence: 99%

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Fabrication of Dual‐Modified Carbon Network Enabling Improved Electronic and Ionic Conductivities for Fast and Durable Li₂TiSiO₅ Anodes

et al. 2019

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Li2TiSiO5 was recently proposed as a Ti‐based anode material for lithium‐ion batteries (LIBs), with the desirable characteristics of low discharge potential and relatively high specific capacity. However, the intrinsically poor electronic and ionic conductivities give rise to its sluggish electrochemical performance. In this work, Li2TiSiO5 modified with a dual‐carbon network (C@LTSO/CNT) is developed by performing a facile synthesis. The obtained dual‐carbon network coupled with small‐sized LTSO particles delivers enhanced electron conductivity frameworks, abundant active interfaces, and a notably higher inner porosity for multidirectional ion diffusion. Such a unique architecture leads to a high specific capacity as well as an ultrafast electrochemical process for LTSO through remarkable electronic and ionic transfer. C@LTSO/CNT electrodes with a low discharge plateau at 0.28 V achieve an extremely competitive specific capacity of over 430 mAh g−1 at 0.5 C, a superb high‐rate performance over 125 mAh g−1 up to 10 C, and a stable cycle lifespan of 1500 cycles without any degradation, displaying significant potential as an ideal anode candidate. Thus, a high‐performance LIB full cell is fabricated with a C@LTSO/CNT anode and a LiFePO4 cathode. This cell shows an energy density of 200 Wh kg−1 with greatly improved properties of high‐power density and pronounced cycling stability.

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Section: Resultssupporting

confidence: 83%

Section: Sample Preparation and Characterizationmentioning

confidence: 99%

Fabrication of Dual‐Modified Carbon Network Enabling Improved Electronic and Ionic Conductivities for Fast and Durable Li₂TiSiO₅ Anodes

et al. 2019

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“…The monoclinic wolframite structure of ZnZrNb 2 O 8 with P2/c (NO.013) space group is adopted as the initial model. 19 Figure 4 4(B). The refinement parameters are listed in Table 1.…”

Section: Sintering Behaviorsmentioning

confidence: 99%

“…Further efforts are still needed to adjust the τ f value to near zero via ion substitution (such as Mn 2+ ) and introduction of secondary phases with positive τ f values (such as Li 2 TiO 3 and CaTiO 3 ). 19,36,37…”

Section: Microwave Dielectric Propertiesmentioning

confidence: 99%

Ti⁴⁺modified MgZrNb₂O₈microwave dielectric ceramics with an ultra‐high quality factor

et al. 2021

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Ti 4+ -modified MgZrNb 2 O 8 (MgZr 1x Ti x Nb 2 O 8 , x = 0, 0.1, 0.2, 0.3, 0.4) ceramics were synthesized using the traditional solid-state reaction method. Pure MgZr 1x Ti x Nb 2 O 8 was detected without any secondary phase via the X-ray diffraction patterns. According to the sintering behavior and the surface morphology results, the introduction of Ti 4+ reduced the sintering temperature and promoted the grain growth.The correlations between the dielectric properties and the crystal structure were analyzed through the Rietveld refinement and Raman spectroscopy. The slight shifts of the Raman peaks, corresponding to different vibration modes, were induced by the substitution of Ti 4+ for Zr 4+ and related to the improved quality factor. In general, the sample of MgZr 0.9 Ti 0.1 Nb 2 O 8 sintered at 1320°C for 4 h exhibited promising microwave dielectric properties with an ultra-high Q × f value of 130 123 GHz (at 7.308 GHz, 20°C), which is potential for 5G communication applications.

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“…Pure Mg 2 SiO 4 was reported to have a low permittivity (ε r ) of 6.8 and a high Q × f of 240,000 GHz (Tsunooka et al, 2003). Lai et al reported a good temperature stability and a high Q × f of 237,400 GHz for low temperature (850-950 • C) fired Mg 2 SiO 4 -Li 2 TiO 3 composite ceramics (Lai et al, 2017). Zhang et al reported that a high Q × f of 99,800 GHz for forsterite (Mg 1−x Ni x ) 2 SiO 4 ceramics at a middle sintering temperature of 1,150 • C (Zhang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Microwave Dielectric Properties of (1-x) Li2MoO4–xMg2SiO4 Composite Ceramics Fabricated by Cold Sintering Process

Song

Liu

et al. 2019

Front. Mater.

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Cold sintering process was successfully employed to fabricate (1-x) Li 2 MoO 4-xMg 2 SiO 4 (LMO-xMSO) microwave dielectric ceramics for 5G enabled technology. Dense LMO-xMSO ceramics were obtained with a high relative density in the range of 85-100% under the conditions of 200 • C and 500 MPa in an hour. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and Raman spectroscopy showed that both the LMO and MSO phases co-exist in all composite ceramics, and that there is no detectable secondary phase. Composites of LMO-xMSO (0 < x < 0.3) resonated at microwave frequency (∼9 GHz) with a low relative permittivity (ε r) of 5.05∼5.3, and a high microwave quality factor (Q × f) of 9,450∼24,320 GHz, which are attractive for the applications of 5G enabled components.

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Temperature stability and high-Qf of low temperature firing Mg2SiO4–Li2TiO3 microwave dielectric ceramics

Cited by 34 publications

References 30 publications

Fabrication of Dual‐Modified Carbon Network Enabling Improved Electronic and Ionic Conductivities for Fast and Durable Li₂TiSiO₅ Anodes

Fabrication of Dual‐Modified Carbon Network Enabling Improved Electronic and Ionic Conductivities for Fast and Durable Li₂TiSiO₅ Anodes

Ti⁴⁺modified MgZrNb₂O₈microwave dielectric ceramics with an ultra‐high quality factor

Microwave Dielectric Properties of (1-x) Li2MoO4–xMg2SiO4 Composite Ceramics Fabricated by Cold Sintering Process

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Temperature stability and high-Qf of low temperature firing Mg2SiO4–Li2TiO3 microwave dielectric ceramics

Cited by 34 publications

References 30 publications

Fabrication of Dual‐Modified Carbon Network Enabling Improved Electronic and Ionic Conductivities for Fast and Durable Li2TiSiO5 Anodes

Fabrication of Dual‐Modified Carbon Network Enabling Improved Electronic and Ionic Conductivities for Fast and Durable Li2TiSiO5 Anodes

Ti4+modified MgZrNb2O8microwave dielectric ceramics with an ultra‐high quality factor

Microwave Dielectric Properties of (1-x) Li2MoO4–xMg2SiO4 Composite Ceramics Fabricated by Cold Sintering Process

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Product

Resources

About

Fabrication of Dual‐Modified Carbon Network Enabling Improved Electronic and Ionic Conductivities for Fast and Durable Li₂TiSiO₅ Anodes

Fabrication of Dual‐Modified Carbon Network Enabling Improved Electronic and Ionic Conductivities for Fast and Durable Li₂TiSiO₅ Anodes

Ti⁴⁺modified MgZrNb₂O₈microwave dielectric ceramics with an ultra‐high quality factor