Near-Field Electrospray Microprinting of Polymer-Derived Ceramics

Duan, Hongxu; Li, Cheng; Yang, Weiwei; Lojewski, Brandon; An, Linan; Deng, Weiwei

doi:10.1109/jmems.2012.2226932

Cited by 29 publications

(18 citation statements)

References 24 publications

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“…However, the evolution of the electronic structures of PDCs has been ignored. Such “negligence” is rather unconscionable, given that PDCs exhibited unique high‐temperature semiconducting behavior and are promising for making high‐temperature microelectromechanical systems and microsensors . Learning their electronic structure evolutions can lead to a better understanding of the semiconducting behavior and form a guideline for the applications of the materials.…”

Section: Introductionmentioning

confidence: 99%

“…Such "negligence" is rather unconscionable, given that PDCs exhibited unique high-temperature semiconducting behavior 17,18 and are promising for making high-temperature microelectromechanical systems and microsensors. [19][20][21][22] Learning their electronic structure evolutions can lead to a better understanding of the semiconducting behavior and form a guideline for the applications of the materials. One reason that is responsible for the "negligence" is that the electronic structure of amorphous semiconductors is rather complex and difficult for theoretical calculation; and the complex structures and compositions of PDCs made the situation even worse.…”

Section: Introductionmentioning

confidence: 99%

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Evolution in the Electronic Structure of Polymer‐derived Amorphous Silicon Carbide

Wang

et al. 2015

J. Am. Ceram. Soc.

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The electronic structure of polymer-derived amorphous silicon carbide pyrolyzed at different temperatures was investigated by combining measurements of their temperature-dependent conductivity and optical absorption. By comparing the experimental results with theoretical models, the parameters such as conduction band, band-tail, defect energy, and Fermi energy were determined. The results revealed that band gap and bandtail width decreased with increasing pyrolysis temperature. Furthermore, it was found that electrons transport followed a band-tail hopping mechanism, rather than variable range hopping. These results were discussed in accordance with the microstructural evolutions of the material.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evolution in the Electronic Structure of Polymer‐derived Amorphous Silicon Carbide

Wang

et al. 2015

J. Am. Ceram. Soc.

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“…In addition, compared to polycrystalline ceramics prepared by powder metallurgy based techniques, polymer-derived ceramics (PDCs) exhibit a set of unique properties such as high-temperature semiconducting and piezoresistivity [29][30][31][32]. The direct chemical-to-ceramic process of PDCs also offers an unusual flexibility to synthesize components with various shapes and structures [33][34][35][36][37][38]. Majoulet and coworkers reported the synthesis of hierarchically porous SiBCN ceramic monolith by spark plasma sintering (SPS) of ordered mesoporous SiBCN powders [4].…”

Section: Introductionmentioning

confidence: 99%

Template-free synthesis of hierarchically porous SiBCN monolith from organic gel precursors

Yang

Zou

Zhang

et al. 2016

Ceramics International

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A novel template-free method to synthesize hierarchically porous SiBCN monolith from a tailor-made organic gel precursor is proposed. The process includes four steps: the condensation reaction of tris[dichloromethylsilylethyl]borane and bis(trimethylsilyl)carbodiimide, the replacement of byproduct trimethylchlorosilane by styrene solution, the polymerization of styrene and the pyrolysis at 1000 C. The structures and thermal properties of organic gel precursors and SiBCN monolith, as well as the high temperature properties of SiBCN monolith were studied. This work demonstrates that the introduction of polystyrene is the key to obtain stable three-dimensional porous SiBCN network. The obtained SiBCN monolith displays a © 2016. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2 hierarchically porous structure with an average pore size of 1.95 nm, a pore volume of 0.335 cm 3 g 1 and a specific surface area of 31.78 m 2 g 1 . It is also observed that such hierarchically porous structure could be maintained after annealing at 1500 C. A pore size homogenization process is proposed to clarify the changes of porous architectures during the high temperature annealing.

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“…Needle-substrate distance is normally kept smaller than millimeter scale in order to focus the electric field force and reduce the diffusion of satellite droplets. Recently, E-Jet printing has been used for pattering various ceramic structures, such as grid ZnO nanofibers [26], SiCN micro pentagram structures [27] and Al 2 O 3 nanoparticle patterns [28].…”

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confidence: 99%

Electrohydrodynamic jet printing of PZT thick film micro-scale structures

Wang

Zhu

Liang

et al. 2015

Journal of the European Ceramic Society

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© 2015 Elsevier Ltd. This paper reports the use of a printing technique, called electrohydrodynamic jet printing, for producing PZT thick film micro-scale structures without additional material removing processes. The PZT powder was ball-milled and the effect of milling time on the particle size was examined. This ball-milling process can significantly reduce the PZT particle size and help to prepare stable composite slurry suitable for the E-Jet printing. The PZT micro-scale structures with different features were produced. The PZT lines with different widths and separations were fabricated through the control of the E-Jet printing parameters. The widths of the PZT lines were varied from 80μm to 200μm and the separations were changed from 5μm to 200μm. In addition, PZT walled structures were obtained by multi-layer E-Jet printing. The E-Jet printed PZT thick films exhibited a relative permittivity (er) of ~233 and a piezoelectric constant (d33, f) of ~66pCN^-1

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Near-Field Electrospray Microprinting of Polymer-Derived Ceramics

Cited by 29 publications

References 24 publications

Evolution in the Electronic Structure of Polymer‐derived Amorphous Silicon Carbide

Evolution in the Electronic Structure of Polymer‐derived Amorphous Silicon Carbide

Template-free synthesis of hierarchically porous SiBCN monolith from organic gel precursors

Electrohydrodynamic jet printing of PZT thick film micro-scale structures

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