A new approach to the synthesis of nanosized powder CaO and its application as precursor for the synthesis of calcium borates

Effect of processing parameters on the morphology of hydrothermally synthesized calcium borate powders

“…Calcium borate, which consists of calcium (Ca), boron (B), hydrogen (H), and oxygen (O) elements, is widely used in dielectric devices, 1 flame retardant systems, 2,3 adsorbents of heavy metal ions, 4 insecticide, 5 and also and its use as an antibacterial material has been studied in recent years 6 . Colemanite, nobleite, datolite, hydroboracite, proberite, ulexite, cahnite, inderborite, takedait, inyoit, pamdermite, mayerhofferite, and priceite are hydrated calcium borate forms, which can be found naturally or can be produced experimentally at the laboratories 2,7–11 . Calcium borate has superior properties that are high mechanical strength, low density and coefficient of thermal expansion, high thermal stability, and also, chemically inert 11 .…”

“…Kozerozhets et al. synthesized priceite (Ca 2 (B 5 O 7 )(OH) 5 ·H 2 O), the initial solution of which consists of boric acid and calcium oxide, by using HS 11 . Calcium borate nanoslice was produced by utilizing borax (Na 2 B 4 O 7 ·10H 2 O) and calcium nitrate (Ca(NO 3 ) 2 ·4H 2 O) by using HS at 180°C for 4 h 31 .…”

“…6 Colemanite, nobleite, datolite, hydroboracite, proberite, ulexite, cahnite, inderborite, takedait, inyoit, pamdermite, mayerhofferite, and priceite are hydrated calcium borate forms, which can be found naturally or can be produced experimentally at the laboratories. 2,[7][8][9][10][11] Calcium borate has superior properties that are high mechanical strength, low density and coefficient of thermal expansion, high thermal stability, and also, chemically inert. 11 Calcium borate and hydrated forms have been produced by coprecipitation, phase transformation methods, and also, in terms of obtaining different morphologies, hydrothermal synthesis (HS) is a remarkable method.…”

“…2,[7][8][9][10][11] Calcium borate has superior properties that are high mechanical strength, low density and coefficient of thermal expansion, high thermal stability, and also, chemically inert. 11 Calcium borate and hydrated forms have been produced by coprecipitation, phase transformation methods, and also, in terms of obtaining different morphologies, hydrothermal synthesis (HS) is a remarkable method. [12][13][14] HS method is based on the principle of producing powder from solutions under the synergistic effect of temperature and pressure, so the properties of the starting solution, temperature, and pressure are very important for the process.…”

Gold(III) Complexation in the Presence of the Macropolyhedral Hydridoborate Cluster [B20H18]2−

“…In addition, the boron cluster anions form compounds with metal(II) complex cations acting as counterions, e.g., Cu(II), Fe(II), Co(II), Ni(II), and Mn(II) [15,[21][22][23][24][25][26]. In the presence of metals(III) complexes, the boron cluster anions act as reducing agents being oxidized to oxidoborates [27][28][29]. On the other hand, boron clusters form numerous products of the substitution of terminal hydrogen atoms by various functional groups keeping the initial closo-structure [30][31][32][33][34].…”