fields due to its low thermal expansion coefficient,high transparency,excellent mechanical properties and other characteristics.In recent years,it has received extensive attention from researchers.This article summarizes the current research status of LAS glass-ceramics,introduces the LAS crystal phase system...
AccordingLi2O-Al2O3-SiO2(LAS) system glass phase diagram,a set of compositions were designed. 实验以Li2O-Al2O3-SiO2(LAS)系统微晶玻璃为研究对象,根据LAS系统玻璃三元相图设计玻璃组成,并在基础组分不变的前提下,选择了La2O3等5种稀土氧化物采取外加法进行掺杂,应用高温粘度仪测试分析了玻璃液的高温粘度。
Phase equilibria along the nonbinary join between cordierite (2MgO · 2Al 2 O 3 · 5SiO 2 ) and spodumene (Li 2 O · Al 2 O 3 · 4SiO 2 ) were investigated in the temperature range 800° to 1550°C. using the quench technique on fourteen compositions. The phase diagram at high...
关键词:微晶玻璃、晶核剂、热处理制度、分相、热膨胀系数、力学性能 ABSTRACT AccordingtoRusumRoyandE.F.OsbornsU20-A.1203-SiO2systemglass phasediagram,asetofcompositionsofLASsystemglass-ceramicsdopedP205, Ti02asnucleatingagentweredesigned.Thehomogeneousandcolorlessbase glasseswerepreparedatthelowertemperatureof...
phase. The metastable b-quartz solid solution must develop below 750 C, and otherwise it will change to b-spodumene solid solution. Additionally, the phase diagramof SiO 2 says the stable b-quartz can form in the temperature range of 230e570 C, or else it will immediately transform to a-...
A glass composition in the Li2O–Al2O3–SiO2 (LAS)-ternary phase diagram is presented, which enables the crystallization of Li2Si2O5 as well as LiAlSi2O6 u... M Laczka,K Laczka,K Cholewa-Kowalska,... - 《Journal of the American Ceramic Society》 被引量: 15发表: 2014年 Preparation...
A coupled phase diagram experimental study and thermodynamic optimization of the Li2O-CaO-Al2O3 and Li2O-CaO-SiO2 systems, and prediction of the phase diagrams of the Li2O-CaO-Al2O3-SiO2 system - ScienceDirectLi2O-CaO-Al2O3Li2O-CaO-SiO2...
In spite of their interest, the thermodynamic properties and phase diagrams of PO-bearing systems are still not well known yet. As a result, we critically reviewed and optimized the structural, thermodynamic and phase diagram data belonging to the system LiO-NaO-CaO-FeO-FeO-AlO-SiO-PO. This ...
[5]. In this phase diagram, there is also a thermal barrier at the mole fraction of Al2O3 = 0.5 (LiAlO2), so that at 0.18 < Al2O3 < 0.5 the resulting mixture is Li5AlO4/LiAlO2 and at 0.5 < Al2O3 < 0.82 the resulting mixture is LiAlO2/LiAl5O8. The two compounds ...
In regions of the phase diagram where the second derivative of the Gibbs free energy with respect to composition is negative, there is no barrier to phase growth [62]. According to Cahn [62], this transformation proceeds through a continuous alteration in the composition of the growing phases ...