Low temperature crystallized voltage tunable Bi1.5Cu Mg1−Nb1.5O7 thin films capable of integration with Au electrode

Ning, Pingfan; Li, Lingxia; Xia, Wangsuo; Zhang, Xiaoyu

doi:10.1016/j.ceramint.2012.02.088

Cited by 9 publications

(6 citation statements)

References 18 publications

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“…The maximum dielectric constant reaches about 113 for the sample grown at 750°C. The tunability of the thin films is defined as [34][35][36]:…”

Section: Performance Of Flexible and Transparent Tunable Capacitorsmentioning

confidence: 99%

Graphene-Based Flexible and Transparent Tunable Capacitors

Man¹,

Xu²,

Jiang³

et al. 2016

Nano Online

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We report a kind of electric field tunable transparent and flexible capacitor with the structure of graphene-Bi 1.5 MgNb 1.5 O 7 (BMN)-graphene. The graphene films with low sheet resistance were grown by chemical vapor deposition. The BMN thin films were fabricated on graphene by using laser molecular beam epitaxy technology. Compared to BMN films grown on Au, the samples on graphene substrates show better quality in terms of crystallinity, surface morphology, leakage current, and loss tangent. By transferring another graphene layer, we fabricated flexible and transparent capacitors with the structure of graphene-BMN-graphene. The capacitors show a large dielectric constant of 113 with high dielectric tunability of~40.7 % at a bias field of 1.0 MV/cm. Also, the capacitor can work stably in the high bending condition with curvature radii as low as 10 mm. This flexible film capacitor has a high optical transparency of~90 % in the visible light region, demonstrating their potential application for a wide range of flexible electronic devices.

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“…The maximum dielectric constant reaches about 113 for the sample grown at 750°C. The tunability of the thin films is defined as [34][35][36]:…”

Section: Performance Of Flexible and Transparent Tunable Capacitorsmentioning

confidence: 99%

Graphene-Based Flexible and Transparent Tunable Capacitors

Man¹,

Xu²,

Jiang³

et al. 2016

Nano Online

View full text Add to dashboard Cite

show abstract

“…Copper compounds typically have low melting points and low crystallization temperatures. 28,29 CuO has been introduced by replacing divalent metal ions with Cu 2+ to reduce the sintering temperature of ceramics. For example, substituting Mg 2+ with Cu 2+ reduces the sintering temperature of Mg 2 Al 4 Si 5 O 18 ceramics from 1600 • C to 1420 • C, 30 substituting Mg 2+ with Cu 2+ reduces the sintering temperature of MgTiO 3 ceramics from 1430 • C to 1150 • C, 31 and substituting Zn 2+ with Cu 2+ reduces the sintering temperature of Zn 2 WO 3 ceramics from 1200 • C to 925 • C. 32 Numerous studies have shown that the substitution of Cu 2+ ions for divalent metal ions reduces the sintering temperature of ceramics.…”

Section: Introductionmentioning

confidence: 99%

Crystal structure and microwave dielectric properties of Li₂(Mg_1–_xCu_x)₂Mo₃O₁₂ ceramics sintered at ultra‐low temperature

Yuan,

Meng,

Wang

et al. 2024

J Am Ceram Soc.

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Li2(Mg1–xCux)2Mo3O12 (0 ≤x ≤0.1) ceramics were prepared using the conventional solid‐phase method to study the effect of the Cu2+ substitution for Mg2+ on the sintering behavior, crystal structure, and microwave dielectric properties of ceramics. The experimental results show that the substitution of Cu2+ for Mg2+ reduces the sintering temperature of the ceramics to 550°C. X‐ray diffraction patterns show that the introduction of Cu2+ does not produce a new phase, but rather promotes the formation of Li2(Mg1–xCux)2Mo3O12 solid solution. The microwave dielectric properties of the ceramics are influenced by the cell parameters, bond lengths, and structural stability. However, Cu2+ creates oxygen vacancies during sintering, thereby deteriorating the dielectric properties (Q × f decreases). The microwave dielectric properties of Li2(Mg1–xCux)2Mo3O12 ceramics are optimal at a sintering temperature of 550°C and x = 0.02, with εr = 9.17, Q × f = 7960 GHz, and τf = –58.77 ppm/°C. Additionally, these ceramics are compatible with Al electrodes.

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“…However, the cubic pyrochlore structure has a great deal of tolerance for introducing different ions on the A site. Considerable doping modification for enhancing the dielectric properties of bismuth-based pyrochlores are studied, such as Ca 2+ , Nd 3+ , Cu 2+ , and Co 2+ doping modifications. − …”

Section: Introductionmentioning

confidence: 99%

Disordered Structures and Dielectric Properties of Ni-Doped Bismuth Magnesium Niobate Pyrochlores

et al. 2021

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Bismuth based cubic pyrochlores are attractive candidates for microwave agile devices. The structure dependence of dielectric properties of Bi1.5Mg1–x Ni x Nb1.5O7 (Ni-BMN, x = 0.0–0.5) ceramics are discussed systematically. All the Ni-BMN pyrochlores show a cubic pyrochlore structure with a preferential (222)-orientation. However, Ni2+ ions entering would reduce the symmetry of cubic pyrochlore structure, which may increase the disorder degree of cubic pyrochlore structure. The detailed status of A2O and BO6 networks in Ni-BMN are revealed by structure analysis. The dielectric constant of Ni-BMN pyrochlores show slightly decrease from 168 to 148 with increasing Ni-doping content due to the lower polarizability of Ni2+. However, Ni-doping can effectively decrease the dielectric loss of Ni-BMN pyrochlores from 0.00072 to 0.00039. Moreover, Ni-doping improves the temperature stability of Ni-BMN pyrochlores, which is attributed to the altered O–Ni-O chain.

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Low temperature crystallized voltage tunable Bi1.5Cu Mg1−Nb1.5O7 thin films capable of integration with Au electrode

Cited by 9 publications

References 18 publications

Graphene-Based Flexible and Transparent Tunable Capacitors

Graphene-Based Flexible and Transparent Tunable Capacitors

Crystal structure and microwave dielectric properties of Li₂(Mg_1–_xCu_x)₂Mo₃O₁₂ ceramics sintered at ultra‐low temperature

Disordered Structures and Dielectric Properties of Ni-Doped Bismuth Magnesium Niobate Pyrochlores

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Low temperature crystallized voltage tunable Bi1.5Cu Mg1−Nb1.5O7 thin films capable of integration with Au electrode

Cited by 9 publications

References 18 publications

Graphene-Based Flexible and Transparent Tunable Capacitors

Graphene-Based Flexible and Transparent Tunable Capacitors

Crystal structure and microwave dielectric properties of Li2(Mg1–xCux)2Mo3O12 ceramics sintered at ultra‐low temperature

Disordered Structures and Dielectric Properties of Ni-Doped Bismuth Magnesium Niobate Pyrochlores

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Product

Resources

About

Crystal structure and microwave dielectric properties of Li₂(Mg_1–_xCu_x)₂Mo₃O₁₂ ceramics sintered at ultra‐low temperature