Spark plasma sintering and forming of transparent polycrystalline Al<sub>2</sub>O<sub>3</sub> windows and domes

Dongtao Jiang; Dustin M. Hulbert; Umberto Anselmi-Tamburini; Terry Ng; Donald Land; Amiya K. Muhkerjee

doi:10.1117/12.730861

2 May 2007 Spark plasma sintering and forming of transparent polycrystalline Al2O3 windows and domes

Dongtao Jiang, Dustin M. Hulbert, Umberto Anselmi-Tamburini, Terry Ng, Donald Land, Amiya K. Muhkerjee

Proceedings Volume 6545, Window and Dome Technologies and Materials X; 654509 (2007) https://doi.org/10.1117/12.730861
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

Spark plasma sintering(SPS) method was used to produce transparent alumina and it proved to be a cost-effective method due to short processing cycle. It was found that the optical transmittance of alumina is greatly influenced by SPS sintering parameters. A maximum transmittance of 85% has been achieved by sintering at 1300°C for 5min. Annealing in air at 1250°C for 24h significanly increased mid-infrared transmission. Utilizing SPS, transparent polycrystalline alumina domes have been successfully produced by combining sintering and forming into one step in minutes instead of hours needed when using conventional methods. This is a near-net-shape forming method such that only a minor amount of machining or polishing is needed. The present forming method provides an unprecedented opportunity to make optically transparent domes at much lower costs.

Citation Download Citation

Dongtao Jiang, Dustin M. Hulbert, Umberto Anselmi-Tamburini, Terry Ng, Donald Land, and Amiya K. Muhkerjee "Spark plasma sintering and forming of transparent polycrystalline Al2O3 windows and domes", Proc. SPIE 6545, Window and Dome Technologies and Materials X, 654509 (2 May 2007); https://doi.org/10.1117/12.730861

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available