Mayenite-based electride C12A7e⁻: an innovative synthetic methodviaplasma arc melting

Abstract

The plasma arc melting of mixtures of oxygen-mayenite and solid-reductants (aluminum and graphite) enables the scalable synthesis of mayenite-based electrides with treatment times below one minute.

Enhancing the injected electron concentration and thermionic emission property in C12A7:e− ceramic via Al site Zr doping

“…This study used the chemical method‐SPS to synthesize Zr‐doped C12A7:e − electrides with a maximum injected electron concentration of 2.4×10 21 /cm 3 and a zero‐field emission current density of 2.4 A/cm 2 . It can be seen from the comparative experimental results that the Zr cation doping can significantly improve the injected electron concentration and thermionic emission performance of C12A7:e − 15–17,36–39 . Therefore, Zr doping further promotes the application of C12A7:e − cathodes in the field of electric propulsion.…”

“…It can be seen from the comparative experimental results that the Zr cation doping can significantly improve the injected electron concentration and thermionic emission performance of C12A7:e − . [15][16][17][36][37][38][39] Therefore, Zr doping further promotes the application of C12A7:e − cathodes in the field of electric propulsion.…”

Demonstrating the Potential of Alkali Metal-Doped Cyclic C6O6Li6 Organometallics as Electrides and High-Performance NLO Materials

“…Interest in designing high-performance nonlinear optical (NLO) materials is growing rapidly due to their widespread applications in optical computing, − optical communication, , optical switching, , optical logic functions, , dynamic image processing, , and many other optoelectronic fields. − Recently, a unique class of compounds known as electrides having isolated excess electrons has garnered great interest from the chemical society. − Due to this nontrivial electronic structure, they are easily polarizable and can serve as superior nonlinear optical materials. ,, Electrides due to their certain interesting properties such as the ultralow work function, relatively high catalytic activity, high electronic mobility, and optical and anisotropic properties have great potential for various applications. − In 1983, Dye and co-workers fabricated the first organic crystalline electride consisting of organic complexant cages in which alkali metals and electrons were trapped . Since then, various organic and inorganic electrides have been reported in literature, and their novel electronic structures have been investigated both computationally and experimentally. − …”

Improved Thermal and Mechanical Properties of [Ca24Al28O64]4+(4e−) Electride Ceramic by Adding Mo Metal

“…[1][2][3][4][5] Because of these special properties, numerous applications are possible with the material, such as low-work function tether (LWT) [6] and space propulsion. [7][8][9] The C12A7:e-can be prepared by melting glass, quenching, milling, and sintering of the powder under a reductive atmosphere, [10] by the growth as a single crystal, [11,12] sintering of mixed powders as polycrystalline ceramic, [13] plasma arc melting, [14] or deposition as thin film. [15] Although the material has very good electronic properties, its low strength and toughness combined with a low thermal conductivity reduces its reliability and hinders its use in real applications due to the formation of cracks in the ceramic structure as a result of thermal shocks when used under thermal load.…”