Study about functionalizations of transparent oxides utilizing a high-pressure apparatus

研究了带式高压装置中产生压力（<3.7GPa）的精度提高以及在外部温度引起的压力构件（砧/缸、垫圈等）的温度波动下产生压力的再现性。因此，压力误差降低到约0.2 GPa，这是在以前的设置的一半以下。使用这种设置，在钙铝石结构（C12 A7）的钙铝氧化物中的Ca离子与Mg和Sr离子的替代进行了检查。Mg掺杂的C12 A7晶体没有形成，但得到了Sr掺杂的C12 A7，并合成了C12 A7-S12 A7晶体的固溶体。

Accuracy enhancements of generated pressures (<3.7 G Pa) in a belt-type high-pressure apparatus as well as reproducibility of generated pressure under temperature fluctuation of pressure members (anvil/cylinder, gasket etc) due to outside temperatures were examined. As a result, pressure error was reduced within ~0.2 G Pa, which was less than a half of that in a previous setup. Using this setup, replacements of Ca ions with Mg and Sr ions in calcium aluminum oxides with Mayenite-structure (C12A7) were examined. Mg-doped C12A7 crystals were not formed, but Sr-doped C12A7 were obtained and solid solutions of C12A7-S12A7 crystals were synthesized.