Synthesis of a Novel Zeolite through a Pressure-Induced Reconstructive Phase Transition Process

摘要

An understanding of pressure-temperature phase relations is needed for developing new methods for the synthesis of advanced solids.In comparison to thermal treatments, the magnitude of changes in interatomic distances and coordination numbers of atoms is much larger under high pressure than under high temperature. Also, high temperature increases bond distances and atomic mobility, while high pressure generally has the opposite effect, opening unexplored routes for discovering new materials. Importantly, many high-pressure phases retain their structures after returning to ambient pressure, which allows for their characterization and application. The advent of high-pressure devices able to reach pressures in the range of several hundred gigapascals (GPa), such as diamond anvil cells (DACs), has led to significant progress in the study of these new materials. Particularly successful has been the synthesis of highly dense materials such as new metals, semiconductors, super-hard abrasives, magnetic materials, gems, and specialized optical components, among others.