New potential for preparation of performing h-BN coatings via polymer pyrolysis in RTA furnace

Yuan, Sheng; Benayoun, Stéphane; Brioude, Arnaud; Dezellus, Olivier; Beaugiraud, B.; Toury, Bérangère

doi:10.1016/j.jeurceramsoc.2012.09.008

Cited by 11 publications

(20 citation statements)

References 39 publications

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“…Second, the benefit of the higher temperature (1350˝C) compared to the previous one (1200˝C) is evidenced by the XRD analysis. Actually, according to the XRD data (Table 1), the interlayer parameter d was calculated thanks to the Bragg's law is given to be 3.47 Å vs. 3.60 Å for TiBN1350-9f and TiBN1200, respectively, which is much closer to the theoretical value given to 3.33 Å [33] In addition, Table 1 also shows that an increase in the number of flashes allows to get a ceramic with a L c reaching 3 nm. In summary, the whole study tends to show the real potential of an IR annealing to perform crystallized boron nitride, displaying a good chemical stability, at quite low temperature with an onset of crystallization as low as 900˝C.…”

Section: Influence Of Annealing Process and Atmosphere (Rta)supporting

confidence: 70%

“…The crystallites size, La, calculated using the latter relation indicates ( Figure 5) the same tendency as the La increases from 1nm to around 4.7 nm, with increasing temperature. This relatively small crystallite size is proved by direct HR-TEM observations showing the hexagonal structure and crystallite sizes around 5 nm [33]. Besides, we have shown that the ceramic is stable towards air.…”

Section: Influence Of the Annealing Temperaturesupporting

confidence: 51%

“…Actually, XPS chemical analyses, performed on two samples (one just after its synthesis, the other one after more than 2 months under air), reveals no further oxidation. The chemical composition (B/N) remains close to the stoichiometry [33].…”

Section: Influence Of the Annealing Temperaturementioning

confidence: 60%

“…A representative example of the surface is shown in Figure 2. AFM measurement performed on TiBN1200 shows a flat surface within large area and gives a root-mean-square roughness (RMS) of 20 nm [33]. The thickness of the coating can be adjusted by the dip-coating parameters and layer number.…”

Section: Influence Of the Annealing Temperaturementioning

confidence: 99%

“…Furthermore, the presence of both expected signals for h-BN at 1378 and at 790 cm −1 respectively characteristic of B-N stretching and B-N-B bending vibration modes, ensure the preparation of the expected ceramic. AFM measurement performed on TiBN1200 shows a flat surface within large area and gives a root-mean-square roughness (RMS) of 20 nm [33]. The thickness of the coating can be adjusted by the dip-coating parameters and layer number.…”

Section: Influence Of the Annealing Temperaturementioning

confidence: 99%

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How to Increase the h-BN Crystallinity of Microfilms and Self-Standing Nanosheets: A Review of the Different Strategies Using the PDCs Route

et al. 2016

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Hexagonal boron nitride (h-BN) is a well-known material whose use is almost restricted to lubricating applications in domains ranging from metallurgy to cosmetics. Howover, h-BN displays many other interesting properties, opening new perspectives for other engineering applications, such as as a solid lubricant in aeronautics, as the perfect substrate to graphene for electronic devices, etc. However, all these promising developments require tailored h-BN shapes displaying a high level of crystallization, ensuring its properties for the long term. Here, we developed three strategies, all associated with the Polymer Derived Ceramics (PDCs) route, to prepare highly crystallized supported thick coatings and self-standing nanosheets. The first strategy concerns the innovative implementation of a Rapid Thermal Annealing to prepare micrometric h-BN coatings on thermal sensitive substrates. Compared to conventional treatment the crystallization of h-BN has successfully lowered to about 300˝C. The second strategy consists of an additivation of the used polymer precursor. Effect of lithium nitride as a crystallization promoter was investigated lowering the onset crystallization temperature from 1400˝C (traditionally) to 1000˝C. This novel synthetic route allows preparing self-standing highly crystallized h-BN nanolayers. Finally, the third strategy is based on a unique combination of the PDCs route with Spark Plasma Sintering to profit of both approaches. This original method leads to large and well-crystallized flakes available for a subsequent exfoliation.

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Section: Influence Of Annealing Process and Atmosphere (Rta)supporting

confidence: 70%

Section: Influence Of the Annealing Temperaturesupporting

confidence: 51%

Section: Influence Of the Annealing Temperaturementioning

confidence: 60%

Section: Influence Of the Annealing Temperaturementioning

confidence: 99%

Section: Influence Of the Annealing Temperaturementioning

confidence: 99%

See 3 more Smart Citations

How to Increase the h-BN Crystallinity of Microfilms and Self-Standing Nanosheets: A Review of the Different Strategies Using the PDCs Route

et al. 2016

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Novel and Facile Route for the Synthesis of Tunable Boron Nitride Nanotubes Combining Atomic Layer Deposition and Annealing Processes for Water Purification

Weber

Iatsunskyi

Coy

et al. 2018

Adv Materials Inter

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The synthesis of tunable boron nitride nanotubes is the subject of intense research because of their potential applications in various fields, from smart textile materials to emerging environmental technologies. However, the preparation of these nanomaterials remains extremely challenging. Herein, we report proof-of-concept results on the scalable synthesis of boron nitride nanotubes with tunable dimensions. Combining atomic layer deposition (ALD) of boron nitride on carbon nanofibers template supports and successive annealing steps at high temperature, BN nanotubes with controllable properties have been prepared. The successive annealing steps enable the crystallization of BN and the combustion of the initial carbon supports. The self-limiting nature of the ALD process allows for the scalable coating of large scale carbon fibers matrix. High-resolution TEM measurements demonstrated the exquisite dimensions control at the nanoscale and the presence of crystalline BN. The proof-of-concept results presented allow for independent control of the inner and external diameter dimensions, opening up unique possibilities for the precise engineering of

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A Novel Two‐Step Ammonia‐Free Atomic Layer Deposition Approach for Boron Nitride

et al. 2017

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Due to their high potential in energy and environment domains, synthetic approach allowing fabrication of high quality boron nitride (BN) structures in a controlled manner is of great interest. Herein, a two-step ammonia-free atomic layer deposition approach of BN, based on polymer derived ceramics chemistry is reported for the first time. Using trichloroborazine and hexamethyldisilazane as precursors, conformal pre-ceramic polymer layer is grown at low temperature, 80 °C, and then converted into dense hexagonal BN (h-BN). The present approach allows conformal and homogeneous deposition of h-BN films on various substrates with a thickness control at the atomic scale. It proves to be successful for fabricating various tuned BN nanostructures and composites that showed to be efficient in water purification. In particular, the obtained nanostructures demonstrate high hydrophobicity and they are investigated as water filter for organic/water separation. Good separation efficiency is demonstrated that highlights the high potential of such atomic layer deposition (ALD) structures in water treatment.

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New potential for preparation of performing h-BN coatings via polymer pyrolysis in RTA furnace

Cited by 11 publications

References 39 publications

How to Increase the h-BN Crystallinity of Microfilms and Self-Standing Nanosheets: A Review of the Different Strategies Using the PDCs Route

How to Increase the h-BN Crystallinity of Microfilms and Self-Standing Nanosheets: A Review of the Different Strategies Using the PDCs Route

Novel and Facile Route for the Synthesis of Tunable Boron Nitride Nanotubes Combining Atomic Layer Deposition and Annealing Processes for Water Purification

A Novel Two‐Step Ammonia‐Free Atomic Layer Deposition Approach for Boron Nitride

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