ProgramMaster Logo
Conference Tools for Materials Science & Technology 2020
Register as a New User
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting Materials Science & Technology 2020
Symposium Journal of the American Ceramic Society Awards Symposium
Presentation Title Thermochemical Investigation of Lithium Borate Glasses and Crystals
Author(s) Alexandra Navrotsky, Lili Wu, Anastasia Koryttseva, Christoph B. M. Grob
On-Site Speaker (Planned) Alexandra Navrotsky
Abstract Scope Lithium borate glasses and crystals with x = Li/(Li + B) of 0.2–0.5 have been synthesized by the quenching method. Their thermodynamics was analyzed by high–temperature oxide melt solutioncalorimetry. The formation enthalpies from oxides of glasses range from −33.6 to −67.3 kJ/mol and those of crystals range from −42.1 to −77.4 kJ/mol. The formation enthalpies of both glasses and crystals become more negative with increasing Li2O mole fraction up to 0.5. The enthalpies of formation of glasses can be fit over the entire composition range (0 < x < 1) by a quadratic polynomial. The vitrification enthalpies were derived for x = 0.2 to 0.5 and ranged from 8.5 to 17.6 kJ/mol. The main factors controlling energetics are the strongly exothermic acid–base reaction between the network former (B2O3) and the network modifier (Li2O) and the formation of tetrahedrally coordinated boron.


Advances in Polymer-assisted Sol-gel Synthesis of Aluminosilicate Precursors for Modern Cementitious Materials
Direct-Writing of 3D Photonic Crystals with Tunable Terahertz Properties
Effect of CaF2, B2O3 and the CaO/SiO2 Mass Ratio on the Viscosity and Structure of B2O3–Containing Calcium–silicate–based Melts
Glass-ceramics as Potential Waste Forms for Actinide Immobilization
Improvements of Fergusonite-type Microwave Dielectric Ceramics by Ions Substitutions
Introductory Comments: Journal of the American Ceramic Society Awards Symposium
Phase Formation and Mechanical Properties of (Mg,Co,Ni,Cu,Zn)O High Entropy Ceramics by Field Assisted Sintering Technology
Substitutional Effect of Na2O with K2O on the Viscosity and Structure of CaO-SiO2-CaF2-based Mold Flux Systems
Thermochemical Investigation of Lithium Borate Glasses and Crystals

Questions about ProgramMaster? Contact