Effect of borates on the synthesis of nanoscale hexagonal boron nitride by a solid-state method
Yükleniyor...
Dosyalar
Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study delves deeply into the effect of different borates (lithium tetraborate,sodium tetraborate, calcium metaborate, ammonium pentaborate) on the productionand fundamental characteristic features of nanoscale hexagonal boron nitride (hBN)structure with the assistant of standard characteristic measurement methods,namely, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scan-ning and transmission electron microscopy (SEM and TEM). The hBN samples aresynthesized by reaction of powder urea, boron oxide, and different kinds of boratesvia the modified O'Connor method (performed at a relatively lower main heat treat-ment temperature of 1,100 C). All the results obtained show that the usage ofborates affects positively the formation of nanoscale hBN structure. In more detail,the FTIR experiment results reveal that the presence of two strong c peaks appearedat ~1,380 and ~780 cm 1in the spectra points out the conventional BN in-plane andout-of-plane vibrations, respectively. The XRD patterns also confirm the productionof high-ordered hBN as the existence of the main peaks of the corresponding hexag-onal system. As for the SEM examination, it is found that all the hBN materialsexhibit totally different crystallinity quality and microstructural characteristics. ThehBN compound prepared by the sodium tetraborate content shows the most uniformsurface appearance with the smoothest/densest crystal structure, best grain orienta-tions, and finest grain interactions. Hence, the material with strong stretching ofinteratomic bonds shows the highest material (fracture) strength. Moreover, the TEMimages illustrate that all the products are composed of uniform multi-walled nan-otubes and nanorods with an average length of ~250 nm.
Açıklama
Bolu Abant Izzet Baysal University, Grant/Award Number: 2010.03.03.370
Anahtar Kelimeler
Electron Microscopy, Hexagonal Boron Nitride, Nanocrystalline Materials, X-Ray Techniques, Low-Temperature Synthesis, Nanosheets
Kaynak
Microscopy Research And Technique
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
84
Sayı
11
Künye
Öz, M., Bozkurt, Ç., Kanbur Yılmaz, B., & Yıldırım, G. (2021). Effect of borates on the synthesis of nanoscale hexagonal boron nitride by a solid‐state method. Microscopy Research and Technique, 84(11), 2677-2684.
