Journal ArticleDOI
Formation of new oxide glasses by laser spin melting and free fall cooling
TLDR
The best glass formers were in the Nb2O5-and Ta2O3-based systems as mentioned in this paper, where the indices of refraction of most of the glasses and Abbe numbers of many were measured.Abstract:
Glass spherules have been made by laser spin melting and free fall cooling techniques from ceramic rods. Thus, the materials were not in contact with a container at any time. Glasses of 100 to 800 μm diameter were formed from at least 80 wt% of the oxides Al2O3, Ga2O3, In2O3, La2O3, ZrO2, HfO2, Nb2O5 and Ta2O5 with 20 or less weight percent of CaO + SiO2. The best glass formers were in the Nb2O5- and Ta2O5-based systems. The indices of refraction of most of the glasses and Abbe numbers of many were measured.read more
Citations
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Journal ArticleDOI
Rapid solidification processing
L.A. Jacobson,Joanna McKittrick +1 more
TL;DR: In this article, the authors present a review of recent work on rapid solidification of metals and ceramics, along with examples of applications and an assessment of the future directions and prospects for RSP.
Journal ArticleDOI
Calcium-aluminum-rich inclusions in the Allende meteorite: evidence for a liquid origin
Milton Blander,Louis H. Fuchs +1 more
TL;DR: In this article, the authors made a detailed examination of the mineralogy, textures, and assemblages of six calcium-aluminum-rich inclusions (CAI) in the Allende meteorite.
Journal ArticleDOI
Calculated Thermodynamic Data and Metastable Immiscibility in the System SiO2-Al2O3
Subhash H. Risbud,Joseph A. Pask +1 more
TL;DR: In this article, a calculated metastable liquid miscibility gap with a consolute temperature of approx. = 36 mol % Al/sub 2/O/sub 3/ was considered to be thermodynamically most probable.
Journal ArticleDOI
Phase selection in electrohydrodynamic atomization of alumina
TL;DR: In this paper, the phase selection of Al2O3 powders is examined on the basis of fundamental thermodynamic and kinetic considerations and results from computer models predicting the thermal history of the powders.
Patent
al2O3-RARE EARTH OXIDE-ZrO2/HfO2 MATERIALS, AND METHODS OF MAKING AND USING THE SAME
TL;DR: Al2O3-rare earth oxide-ZrO2/HfO2 ceramics and methods of making the same can be found in this article, where they can be made, formed as, or converted into glass beads, articles (e.g., plates), fibers, particles and thin coatings.
References
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Journal ArticleDOI
Revised Phase Diagram for the System Al2O3—SiO2
Shigeo Aramaki,Rustum Roy +1 more
TL;DR: In this article, the equilibrium diagram for the system A12O3-SiO2 has been revised based on 190 runs made up to 1860°C in sealed noble-metal containers.
Journal ArticleDOI
Oxide crystal growth using gas lasers
D. B. Gasson,B. Cockayne +1 more
TL;DR: In this paper, the use of CO2-N2-He gas lasers as a heat source in a floating-zone recrystallisation technique of crystal growth is described, and the problems associated with this technique are reviewed.
Journal ArticleDOI
The Mullite‐Corundum Boundary in the Systems MgO‐Al2O3‐SiO2 and CaO‐Al2O3‐SiO2
Shigeo Aramaki,Rustum Roy +1 more
Journal ArticleDOI
Use of a CO2 laser to prepare chondrule-like spherules from supercooled molten oxide and silicate droplets
TL;DR: In this article, it was suggested that the textures observed would also result from rapid crystallization of relatively slowly cooling molten droplets that may have been produced in larger scale events, including condensation from a nebula of solar composition and solidification in an ambient medium of high temperature.