Formulation and Rheology of Tape Casting Suspensions Based on BaTiO3 Nanopowders

Ivanchenko, S. E.; Dulina, I. O.; Umerova, S. O.; Nikulin, Artem; Ragulya, A. V.

doi:10.1007/978-3-319-18543-9_11

Cited by 3 publications

(3 citation statements)

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“…A more detailed methodology of this calculation and formulas derived has been previously reported by Umerova and Ragulya (7). The formulation of the suspension was based on previous tape casting experience (12). The weight percent of components remains constant, to study the influence of these components on slurry's rheology (table 1).…”

Section: Methodsmentioning

confidence: 99%

“…All measured liquids show insignificant rheopexy except casting suspension which shows a considerable thixotropy degree. Reduction of shear-thinning and thixotropy degree, as well as the increase of strength stress 12 , can be evidence of the structure change to one, that better resists applied shear. It should be mentioned, that rheometer`s shear rate operation diapason is limited and real shear during the casting process can be much higher.…”

Section: Iii1a Suspension Of Batio3 Nanopowder In Ethyl Cellulose Binder Solution (S-1)mentioning

confidence: 99%

“…They are proper suspension composition, casting conditions, and the influence of external factors during the process. Proper suspension composition means an amount and type of each component and technique of suspension preparation (12). Most attention must be given to powder because it determines all functional properties of the sintered tape.…”

Section: Introductionmentioning

confidence: 99%

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BaTiO3 films for multilayer devices by tape casting

Ivanchenko

Umerova²,

Baranovskyi

et al. 2021

Mat & Dev

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The diversity of the applicational scope of modern printed electronics relentlessly requires the improvement of operational properties simultaneously with reducing the overall dimensions of devices. One of the most effective ways to overcome this major obstacle is the reduction of functional layers thickness in respect to the size of the device. In the present article, we are discussing a simple way of practical implementation of miniaturization concept through the application of a well-known high-productive industrial method of tape casting for obtaining thin nanostructured ceramic layers based on BaTiO3 nanopowders for MLCC. Using of nanosized powders per se imply a new approach of developing suspensions with suitable rheology for tape casting. We demonstrate, that a length of polymer molecule defines the size of floccules and therefore influences the thickness and surface quality of tape casted films. A certain nanopowder/polymer ratio contributes to the formation of the tapes with the surface roughness comparable with the size of one nanoparticle (20-25 nm). Moreover, it was established that developed suspensions are extremely sensitive to temperature changes. Lowering the temperature significantly affects the flow character of suspension and thus the thickness of casted tapes. Considering this fact, we propose an effective self-developed pre-cooling method of nanopowder suspension casting, which allows obtaining extremely thin and smooth tapes with a thickness of less than 1 µm and surface roughness of 20–25 nm by tape casting method.

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Section: Methodsmentioning

confidence: 99%

Section: Iii1a Suspension Of Batio3 Nanopowder In Ethyl Cellulose Binder Solution (S-1)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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