Synthesis, characterization, and electrical and optical properties of magnesium-type boracite

Abstract

Synthesis of the magnesium type of the mineral boracite (Mg 3 B 7 O 13 Cl) was studied. Several parameters affecting boracite synthesis were investigated. The raw materials selected were magnesium chloride hexahydrate (MgCl 2 .6H 2 O), magnesium oxide (MgO), and boron oxide (B 2 O 3) . Reaction temperatures were selected between 600 • C and 900 • C. Moreover, three different reaction times of 4, 1, and 0.5 h were studied with the determined optimum molar ratio, reaction temperature, and reaction medium. Synthesized boracite characterization analyses were done by the techniques of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscope (SEM). Reaction yields were also calculated. From the results of this study the magnesium type of boracite was obtained as a single phase with high XRD crystal score. Optimum conditions for the synthesis were as follows:

A Novel Synthesis of Zinc Borates from a Zinc Oxide Precursor via Ultrasonic Irradiation

“…The XRD score of the analysed mineral is equal to 100. 26 According to Fig. 2a, the characteristic peaks and respective miller indexes (h k l) and d spacing [Å] of the synthesized zinc borates are given in Table 2.…”

Characteristic, electrical and optical properties of potassium borate (KB5O8·4H2O) hydrothermally synthesized from different boron sources

“…The XRD scores of the synthesized compounds are given in Table 3. The XRD score is the measure of the similarity of the theoretical compound meaning that when all the peak intensities (%) and peak locations are matched perfectly with the reference card, the XRD score of the analysed mineral is equal to 100 [6,20].…”