Novel Microwave-Assisted Method of Y2Ti2O7 Powder Synthesis

Abstract

In the paper, a novel technique for highly dispersed pyrochlore Y2Ti2O7 is proposed. The experimental results proved that the application of microwave irradiation at a certain stage of calcination allowed synthesizing of Y2Ti2O7 in much shorter time, which ensured substantial energy savings. An increase up to 98 wt.% in the content of the preferred phase with a pyrochlore-type structure Y2Ti2O7 was obtained after 25 h of yttrium and titanium oxides calcination at a relatively low temperature of 1150 °C, while the microwave-supported process took only 9 h and provided 99 wt.% of pyrochlore. The proposed technology is suitable for industrial applications, enabling the fabrication of large industrial amounts of pyrochlore without solvent chemistry and high-energy mills. It reduced the cost of both equipment and energy and made the process more environmentally friendly. The particle size and morphology did not change significantly; therefore, the microwave-assisted method can fully replace the traditional one.

Properties of Cutting Tool Composite Material Diamond–(Fe–Ni–Cu–Sn) Reinforced with Nano-VN

“…Moreover, the hardness H = 5.2 GPa and elastic modulus E = 197 GPa, as well as the values of ration H/E = 0.0264 and index H 3 /E 2 = 3.62 MPa of the sample 1 (see Table 2) significantly exceeded the previously reported values H = 2.68 GPa, E = 125 GPa, H/E = 0.013, and H 3 /E 2 = 0.49 MPa of a similar sample sintered at temperature 800 • C with the subsequent hot post-pressing under the pressure of 160 MPa [36]. Moreover, it can be expected that a finely dispersed structure would increase the durability and cutting capability of the tools prepared using this method of hot-pressing [47][48][49].…”

Comment on “Charge Transfer-Triggered Bi3+ Near-Infrared Emission in Y2Ti2O7 for Dual-Mode Temperature Sensing”

“…Host Crystal Structure. Crystals and powders of Y 2 Ti 2 O 7 have been grown in previous studies by several methods, including microwave synthesis, 41 the optical floating zone technique, 42,43 and the straightforward solid state solution method, 12 as employed herein (Section 4). The structure of Y 2 Ti 2 O 7 has been described by Wang et al 12 It crystallizes in space group Fd3m (No.…”

High-Throughput Micro-Combinatorial TEM Phase Mapping of the DC Magnetron Sputtered YxTi1−xOy Thin Layer System

“…Yttrium titanate (Y 2 Ti 2 O 7 ) with a pyrochlore structure has attracted increasing interest in recent years [ 16 , 17 , 18 , 19 ]. Pyrochlores (s.g. Fd m ) are fluorite structure-based binary oxides having a general formula of A 2 B 2 O 7 , where A is a rare earth metal ion with a coordination number of 8 and B is a transition metal with a coordination number of 6.…”