Dispersion of nano-sized BaTiO3 powders in nonaqueous suspension with phosphate ester and their applications for MLCC

Chu, Li Wen; Prakash, Kuraganti Niranjan; Tsai, Men-Tsuan; Lin, I‐Nan

doi:10.1016/j.jeurceramsoc.2007.10.015

Cited by 42 publications

(17 citation statements)

References 21 publications

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“…It is composed of an anchoring group, which is absorbed onto the particle surface and a polymeric chain with a chemical structure designed to have good solvency in the dispersion medium so as to give optimum steric hindrance to the dispersion 9 . PE contains hydroxyl group, which are ionized to form negatively charged oxygen, and react with ceramic powders electrostatically in the solvent 10 . Thus, PE is expected to stabilize the suspension by both steric hindrance and electrostatic repulsion mechanisms.…”

Section: Resultsmentioning

confidence: 99%

Processing and Dielectric Properties of TiO2 Thick Films for High-Energy Density Capacitor Applications

Chao

Doğan

2010

International Journal of Applied Ceramic Technology

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Nanosized titanium dioxide (TiO 2 ) powders (B40 nm) were used for preparation of tape-casting slurries. Effect of various solvents and dispersants on the dispersability of TiO 2 slurries was studied by sedimentation tests and rheology measurements. TiO 2 green tapes were prepared by tape-casting method and densified at 10001C with a sintered density 495%. Dielectric properties of TiO 2 tapes were studied by measuring of dielectric constant, loss factor and dielectric breakdown strength (BDS) with respect to their microstructural development. BDS values as high as B1400 kV/cm were obtained for sintered tapes so that energy densities up to 14 J/cm 3 could be achieved.

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Section: Resultsmentioning

confidence: 99%

Processing and Dielectric Properties of TiO2 Thick Films for High-Energy Density Capacitor Applications

Chao

Doğan

2010

International Journal of Applied Ceramic Technology

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“…Conventional tape casting, which is applied for the production of many industrial products such as, e.g., capacitors, highly integrated multilayer circuits, sensors, piezo actuators, is limited to tape thicknesses above ca. 1–3 μm 1,2 . Thus, the profile rod technique is a method to overcome this limit and produce tapes of submicrometer thickness in a continuous process, whereas spin‐coating is a discontinuous method.…”

Section: Discussionmentioning

confidence: 99%

“…T here is a lack of methods to manufacture thin layers from particulate systems continuously with thicknesses in the submicrometer range. Using doctor blading techniques, the difficulty to accurately adjust the casting head relative to the moving carrier tape and the casting head design limit the production of tapes with thicknesses below 3 μm 1,2 . On the other hand, techniques like spin‐coating are noncontinuous.…”

Section: Introductionmentioning

confidence: 99%

“…Using doctor blading techniques, the difficulty to accurately adjust the casting head relative to the moving carrier tape and the casting head design limit the production of tapes with thicknesses below 3 mm. 1,2 On the other hand, techniques like spin-coating are noncontinuous. The availability of continuous processes is important, e.g., for the further development of printed electronics.…”

Section: Introductionmentioning

confidence: 99%

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Profile Rod Technique: Continuous Manufacture of Submicrometer-Thick Ceramic Green Tapes and Coatings Demonstrated for Nanoparticulate Zinc Oxide Powders

Straue

Prado

Polster

et al. 2011

Journal of the American Ceramic Society

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There is a fast‐growing market for printable electronics, which requires new techniques for micro‐ and nanofabrication suitable for mass production of functional electronic products. This makes the evaluation and comparison of different printing techniques highly important. In this work, a coating process, referred to as “profile rod technique,” is presented as an alternative to the spin‐coating process for the production of nanoparticulate zinc oxide (ZnO) layers with thicknesses of several hundred nanometers. Such layers could be used, e.g., as semiconducting layers for printed thin film transistors. The profile rod technique, in contrast to spin‐coating, is a continuous process, which allows for easier mass production and reduction in manufacturing costs. To compare the spin‐coating and the profile rod process, submicrometer‐thick layers of ZnO nanoparticle dispersions in ethanol were prepared. Different dispersion techniques were studied concerning their applicability for the manufacture of nanosized particle dispersions because well‐dispersed suspensions are the basic requirement for the manufacture of submicrometer‐thick layers with high morphological quality. The quality of the deposited layers was evaluated concerning their microstructure. Moreover, the profile rod technique could be successfully used for the manufacture of submicrometer ceramic green tapes.

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“…In order to achieve temperature-stable dielectrics, the preceding year has seen significant advances in our understanding of the role of additives and degradation mechanisms of dielectrics in MLCC. 8,9 The effects of rare earth oxides on the dielectric properties and reliability have been discussed in several recent papers, [10][11][12][13] whereas little research has been carried out focusing on La 2 O 3 -doped BaTiO 3 -Nb 2 O 5 -Fe 2 O 3 (BTNF) materials. The dielectric properties of BTNF system have not been reported to our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Microstructure and Dielectric Properties of BaTiO₃–Nb₂O₅–Fe₂O₃ Materials Doped with La₂O₃

Yang

Wang

et al. 2009

Journal of the American Ceramic Society

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The influence of La2O3 doped on the microstructure and dielectric properties, including the phase structure, temperature dependence of permittivity, and the hysteresis loop of BaTiO3–Nb2O5–Fe2O3 (BTNF) materials has been investigated in X‐ray diffraction, SEM, and LCR analyzer, respectively. Experiments revealed that incorporation of proper content of La2O3 basically soluted in the lattice of BaTiO3 and can control the grain‐growth, reduce the dielectric loss of the BTNF materials. The development of microstructure promoted by the additives can result in the improvement of the dielectric constant. When the doping concentration of La2O3 was 3.846 wt%, the relative dielectric constant of the sample sintered at 1280°C only for 2 h could reach 4308, and improve the dielectric‐temperature characteristics markedly. As a result, a novel Y5P can be achieved in the BTNF ceramics, which is very promising for practical use in Y5P multilayer ceramic capacitors.

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Dispersion of nano-sized BaTiO3 powders in nonaqueous suspension with phosphate ester and their applications for MLCC

Cited by 42 publications

References 21 publications

Processing and Dielectric Properties of TiO2 Thick Films for High-Energy Density Capacitor Applications

Processing and Dielectric Properties of TiO2 Thick Films for High-Energy Density Capacitor Applications

Profile Rod Technique: Continuous Manufacture of Submicrometer-Thick Ceramic Green Tapes and Coatings Demonstrated for Nanoparticulate Zinc Oxide Powders

Investigation on the Microstructure and Dielectric Properties of BaTiO₃–Nb₂O₅–Fe₂O₃ Materials Doped with La₂O₃

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Dispersion of nano-sized BaTiO3 powders in nonaqueous suspension with phosphate ester and their applications for MLCC

Cited by 42 publications

References 21 publications

Processing and Dielectric Properties of TiO2 Thick Films for High-Energy Density Capacitor Applications

Processing and Dielectric Properties of TiO2 Thick Films for High-Energy Density Capacitor Applications

Profile Rod Technique: Continuous Manufacture of Submicrometer-Thick Ceramic Green Tapes and Coatings Demonstrated for Nanoparticulate Zinc Oxide Powders

Investigation on the Microstructure and Dielectric Properties of BaTiO3–Nb2O5–Fe2O3 Materials Doped with La2O3

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Investigation on the Microstructure and Dielectric Properties of BaTiO₃–Nb₂O₅–Fe₂O₃ Materials Doped with La₂O₃