Translucent α- and α/β-SiAlON ceramics: study on investigation of the relationship between phase diversity and optical properties
by Suna Avcıoğlu; Semra Kurama
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 15, No. 1, 2020

Abstract: In this study, Dy⁺³, Y⁺³, and La⁺³ doped SiAlON ceramics were fabricated by using spark plasma sintering (SPS) technique. The effects of additive cation, starting composition and processing conditions on the morphological evolution as well as on the phase assembly of SiAlON ceramics were investigated. The influence of phase diversity on the optical properties of SiAlON ceramics was also discussed. Results indicate that the translucent α- SiAlON, α/β-SiAlON ceramics and their in-situ composites with AlNpolytypoids could be successfully obtained. The presence of a high amount of secondary phases such as AlN-polytype and the oxynitride glassy phase has been found to reduce the optical transmission of SiAlON ceramics. The doping of Y⁺³ and Dy⁺³ cations contributed better to the formation of single-phase α-SiAlON than that of La⁺³. Doping SiAlON ceramics with Dy⁺³ cation leads to the formation of relatively homogenised final microstructure. Therefore, higher IR transmission values were observed on Dy-α-SiAlON (42.2%) and Dy-α/β-SiAlON (45.07%) samples.

Online publication date: Thu, 23-Jan-2020

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Microstructure and Materials Properties (IJMMP):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com