Fabrication of Transparent AlON by Gel Casting and Pressureless Sintering
Source abstract
Abstract
Transparent AlON possesses good mechanical and optical properties, which shows great potential for application.However, high fabrication cost seriously restricts its wide usage.To solve this problem, gel-casting and pressureless sintering of transparent AlON was tentatively studied here, with emphasis on low temperature synthesis and anti-hydrolysis treatment of AlON powder.It was found that fine AlON powder could be readily synthesized at a low temperature of 1700 ℃ by a novel carbothermal nitridation technique, using polymer coated AlN/Al 2 O 3 mixture as the starting materials.The powder obtained was submicron in size and its hydrolysis resistance could be significantly improved after surface coating with a polyurethane layer.On the basis of these findings, transparent AlON ceramics was successfully prepared through gel-casting and pressureless sintering.The material sintered at 1850 ℃ showed good optical and mechanical properties, with a high in-line transmittance of 83.1%-86.2%from ultraviolet to mid-infrared and three-point bending strength of 310 MPa.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Injection Molding Process and Properties · Additive Manufacturing and 3D Printing Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (20)
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