Temsilci metal halojenürlerinin hekzagonal bor nitrür sentezi üzerine etkisi

Hexagonal boron nitride is a high temperature solid lubricant with having good electric insulator, inert material, and thermal conductor properties. The specific gravity is low, it is stable in air up to 1000°C. The temperature resistance of BN can be compared to MgO, ZrO2 or CaO but BN shows higher resistance to thermal shock than others. The first synthesis of hexagonal boron nitride came true in 1842 by Balmain, but hBN began to work late as 100 years later in commercial area. In 1957 Wentorf successfully synthesized cBN that is the hardest material after diamond. Afterthat General Electric in USA De Beers in South Africa Sumitomo and Shawa Denko in Japan and some companies in Russia have been in progress to production of it since 1969. Hexagonal boron nitride, like graphite, Hexagonal boron nitride (hBN) has the identical layer structure and characteristic as graphite, and be called "white graphite", has special bonding behaviors that can exist in many different structures. We can say for hexagonal boron nitride has also high refractoriness, lubricity, low thermal expansion, high thermal conductivity, electrical isolation, chemically inertness and easy workability. In this study, hexagonal boron nitride was synthesized with the modified O'Connor method in presence of different alkaline metal halides. X-ray diffraction (XRD) Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) is used to determine structural properties of synthesized specimens. XRD was the main device to determine properties of the samples. Main peaks of Hexagonal Boron Nitride were observed in XRD analysis, also lattice parameters were calculated by it. FTIR results was the first election for us and all of the samples gave main spectra results lastly SEM analysis confirmed nano scale of synthesized products. KEYWORDS: Hexagonal boron nitride, O'Connor method, Alkaline metal halides