Experience in plasma production of hollow ceramic microspheres with required wall thickness

Gulyaev, I. P.

doi:10.1016/j.ceramint.2014.08.040

Cited by 26 publications

(8 citation statements)

References 18 publications

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“…The porosity of the ESP particle was ~ 45% measured by Archimedes’ method, 35 slightly lower than that of the HOSP particle (52%) 46 . Since two particles had similar size and density, as well as the same spray parameters, it was reasonable to assume that they have similar in‐flight speed and surface temperature in the plasma jet.…”

Section: Discussionmentioning

confidence: 95%

Sintering behavior of a nanostructured thermal barrier coating deposited using electro‐sprayed particles

Chen

Shan

et al. 2020

J Am Ceram Soc

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During high temperature service, a series of microstructure and phase evolutions occur in thermal barrier coatings (TBCs), which result in degradation of thermal insulation and durability. In this study, the sintering behavior of an air plasma sprayed 8 wt% YSZ coating deposited using electro-sprayed nanostructured particles (ESP) as feedstock powder was investigated and compared with conventional YSZ coating deposited using hollow spherical powders (HOSP). Due to the distinct asymmetric porous structure formed by nanosized YSZ particles, the ESP powder was partially melted in the plasma jet during the deposition, which resulted in the formation of a nanostructured coating that consisted of porous nanozones and dense zones. The ESP coating not only shows a significantly lower initial thermal conductivity of 0.70 W/ mK, but also exhibits a stronger sintering resistance in terms of phase stability and thermal insulation compared to the conventional coating. When subjected to prolonged sintering at 1400°C for 128 hours, the thermal conductivity of the ESP coating would gradually increase to about half that of the HOSP coating at 1.29 W/mK. These differences are ascribed to the interaction among different sintering behavior between nanozones and dense zones.

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Section: Discussionmentioning

confidence: 95%

Sintering behavior of a nanostructured thermal barrier coating deposited using electro‐sprayed particles

Chen

Shan

et al. 2020

J Am Ceram Soc

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“…For the sake of completeness, however, it should be noted that many other materials, either natural or synthetic, can be used to fabricate Ms&Mb for different applications. A few examples include stainless steel microspheres (for conductive spacers, shock absorption, and micromotor bearings [ 5 ]); metallic nickel hollow microspheres (enhanced magnetic properties; Ni/Pt bimetallic microbubbles have potential applications in portable hydrogen generation systems, due to catalytic properties [ 6 ]); single-crystal ferrite microspheres (for applications not only as magnetic materials but also in ferrofluid technology and in biomedical fields, e.g., biomolecular separations, cancer diagnosis and treatment, magnetic resonance imaging [ 7 ]); single-crystal semiconductor microspheres (for active WGM resonators [ 8 ]); ceramic ZrO 2 hollow microspheres (for thermal applications) [ 9 ]. Glass, polymer, ceramic, metal solid and hollow microspheres are commercially available; there is a wide choice of quality, sphericity (Sphericity was defined in 1935 by the geologist H. Wadell, with reference to quartz particles ( J. Geology 1935, 43 , 250) as the ratio of the surface area of a sphere (with the same volume as the given particle) to the surface area of the particle), uniformity, particle size and particle size distribution, to allow the optimal choice for each unique application.…”

Section: Materials and Fabrication Methodsmentioning

confidence: 99%

Glassy Microspheres for Energy Applications

Righini

2018

Micromachines

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Microspheres made of glass, polymer, or crystal material have been largely used in many application areas, extending from paints to lubricants, to cosmetics, biomedicine, optics and photonics, just to mention a few. Here the focus is on the applications of glassy microspheres in the field of energy, namely covering issues related to their use in solar cells, in hydrogen storage, in nuclear fusion, but also as high-temperature insulators or proppants for shale oil and gas recovery. An overview is provided of the fabrication techniques of bulk and hollow microspheres, as well as of the excellent results made possible by the peculiar properties of microspheres. Considerations about their commercial relevance are also added.

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“…When compared to other types of microspheres, like plastic or hollow glass, SGMs possess a high density, approximately 2.2 g/cc, for borosilicate, 2.5 g/cc for soda-lime, and 4.49 g/cc for barium titanate glass spheres. SGMs have high crushing strength making them suitable for high stress applications where microspheres are exposed to lots of stress during processing or implementation [18,[49][50][51].…”

Section: Sgmsmentioning

confidence: 99%

“…• They supply colour consistency from all viewing angles. • They improve chemical endurance and chipping strength thanks to the glass hardness, and • They supply a durable, non-deformable spacer particles for bond line applications [50][51].…”

Section: Sgmsmentioning

confidence: 99%

Glass Microspheres

Karasu

DEMİREL

ÖZTUVAN

et al. 2019

El-Cezeri Fen Ve Mühendislik Dergisi

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Glass microspheres are microscopic spheres of glass manufactured for a wide variety of uses in thermal insulation coating, putty, plastic casting polyester, radome, synthetic foam, adhesives, printed circuit board substrate, bowling, fan blades, and caulking materials, emulsion explosives, golf, sealant, pipeline insulation materials, artificial marble, PVC, low density oil drilling, light cement etc. Glass microspheres are usually between 1 and 1000 micrometres in diameter, although the sizes can range from 100 nanometres to 5 millimetres in diameter. Microspheres are spherical particles that can be distinguished into two categories; solid or hollow. This paper presented a general overview of glass microspheres.

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Experience in plasma production of hollow ceramic microspheres with required wall thickness

Cited by 26 publications

References 18 publications

Sintering behavior of a nanostructured thermal barrier coating deposited using electro‐sprayed particles

Sintering behavior of a nanostructured thermal barrier coating deposited using electro‐sprayed particles

Glassy Microspheres for Energy Applications

Glass Microspheres

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