Cobalt-doped magnesium oxide pressure-transmitting medium for high pressure and high-temperature apparatus

Graphite/diamond transformation mechanism under the action of an iron-based catalyst

“…The HPHT experiments were conducted in a DS6 × 14 MN cubic press (a multi-anvil apparatus developed at Sichuan University, including 6 anvils of tungsten carbide with a culet edge length of 23.5 mm, was used to generate the high pressure), and HPHT experiments at 6 GPa, 7 GPa and 8 GPa were carried out in a two-stage multi-anvil apparatus based on a DS6 × 8MN cubic press (Zhangjiakou Exploration Machinery Factory, China) developed at Sichuan University. 17,25 The press chamber pressure was calibrated using the known pressure-induced phase transitions of certain metals (Bi, Tl, and Ba) and semiconductor-metals (ZnTe and ZnS). Manganin was also used to calculate the calibration results.…”

In situ generated gas bubble-directed self-assembly of multifunctional MgO-based hybrid foams for highly efficient thermal conduction, microwave absorption, and self-cleaning

“…6d). 2,5,7,9,11,[35][36][37][38][39][40][41][42][43][44][45][46]48 The heat transfer pathway of foams largely depends on their composition. Herein, MgO/Mg(OH) 2 /C foams are composed of MgO, Mg(OH) 2 , and amorphous C; MgO/Co/C foams consist of Co 0 , MgO, and amorphous C. Heat is transferred via electrons in Co 0 and crystal lattice vibrations (phonons) in MgO, Mg(OH) 2 , amorphous C, and pure silica films.…”

A double-layer heating method to generate high temperature in a two-stage multi-anvil apparatus*

“…The octahedral semi-sintered cobalt-doped magnesia (MgO) with length of 10 mm acted as the pressure medium. [13] The homemade calcium oxide-zirconia (CaO-ZrO 2 ) solid solution was used as the insulation material. [17] The Re foils were used as heaters and the Ta foils were used as electrodes in all runs.…”