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21.
Cost-effective Green Synthesis of Boron rich Carbide Coatings for IR Windows and Night Vision Optics
SWAPNA MOHANACHANDRAN NAIR SINDHU, 2020, original scientific article

Abstract: The increasing demand for infrared (IR) window materials for various applications in optical imaging systems necessitates the development of cost-effective green techniques. Herein, the synthesis of refractory boron carbide (BC) using castor oil, as carbon precursor, and the preparation of IR transparent films by thermal vapor deposition technique is reported. Films are prepared with 1:3, 1:4, and 1:5 ratios of boric acid and castor oil, respectively. The X-ray diffraction (XRD) and Fouriertransform IR (FTIR) analyses reveal the structure of films prepared to be BC. The morphology of the films is analyzed by the atomic force microscopy (AFM) technique, and its dependence on precursor’s ratio is also studied. The spectroscopic characterization by the ultraviolet–visible–near IR (UV–vis–NIR) transmittance study reveals the potential of the films for IR window applications. The bandgap energy of the BC films determined from the Tauc plot yields a value of 2.33 eV. The absorption coefficient, extinction coefficient, refractive index, dissipation factor, and optical conductivity are also studied from the reflectance and transmittance data.
Found in: ključnih besedah
Keywords: Green Synthesis, Boron rich Carbide, coatings, IR Windows
Published: 05.07.2022; Views: 76; Downloads: 0
.pdf Fulltext (1,49 MB)

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23.
Thermal diffusivity control in titanium dioxide nanofluid through phase tuning
Riya Sebastian, Swapna Mishra, Vimal Raj, Misha Hari, Sankaranarayana Iyer Sankararaman, 2018, original scientific article

Found in: ključnih besedah
Keywords: thermal diffusivity, thermal lens, sol–gel synthesis
Published: 06.07.2022; Views: 129; Downloads: 4
.pdf Fulltext (2,24 MB)
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