Realizing translucency in aluminosilicate glass at ultralow temperature via cold sintering process
作者机构：State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsInstitute of Functional MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China Department of ChemistryFudan UniversityShanghai 200438China
出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)
年 卷 期：2022年第11卷第11期
页 面：1714-1724页
核心收录：
学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：financially supported by the National Natural Science Foundation of China(No.52122203)
主 题：glass cold sintering process(CSP) optical properties mechanical properties
摘 要：Glass with high visible-light transparency is widely considered as the most important optical material,which typically requires a processing temperature higher than 1000℃.Here,we report a translucent aluminosilicate glass that can be prepared by cold sintering process(CSP)at merely 300℃.After eliminating structural pores in hexagonal faujasite(EMT)-type zeolite by heat treatment,the obtained highly active nanoparticles are consolidated to have nearly full density by adding NaOH solution as liquid ***,direct densification of EMT powder cannot remove the structural pores of zeolite completely,leading to an opaque compact after the *** is proved that the chemical reaction between the NaOH-and zeolite-derived powders is highly beneficial to dissolution–precipitation process during sintering,leading to the ultra-low activation energy of 27.13 kJ/*** the addition of 5 M NaOH solution greatly promotes the densification via the reaction with aluminosilicate powder,lower or higher concentration of solvent can deteriorate the transmittance of ***,the CSP-prepared glass exhibits a Vickers hardness of 4.3 GPa,reaching 60%of the reported value for spark plasma sintering(SPS)-prepared sample.
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