Skip to main content

Microstructure and Photoluminescence Characterizations of Y3Al5O12:Ce Phosphor Ceramics Sintered with Silica

Buy Article:

$51.00 plus tax (Refund Policy)


The effects of silica additions (0.5–5 wt%) and sintering temperatures (980°C–1400°C) on the microstructure and photoluminescence (PL) of Ce‐doped Y3Al5O12 (YAG:Ce) phosphor ceramics were investigated in this study. Fourier transform infrared (FTIR) measurements showed the disappearance of silica (1 wt%) at 1200°C, indicating the incorporation of Si into YAG host and agreeing with the nuclear magnetic resonance (NMR) results. Microstructures of YAG:Ce ceramics with various silica additions observed using scanning electron microscope (SEM) and transmission electron microscope (TEM) revealed an obvious increasing densification and grain growth for the samples of >2.5 wt% silica at 1400°C. PL analysis demonstrated a higher intensity with increasing the sintering temperatures and the amount of silica addition. Two reasons were supposed to induce this PL enhancement of silica‐treated YAG:Ce ceramics. First, Si will replace tetrahedral Al sites and induce a homogeneous diffusion as well as distribution of Ce dopant in the YAG host due to a smaller ionic radius of Si (0.026 nm) than that of Al (0.039 nm). Secondly, a liquid phase sintering will occur with the presence of silica in YAG:Ce, resulting in the densification of ceramics and an easier migration of Ce activators to inhibit the concentration quenching effect.

Document Type: Research Article


Publication date: April 1, 2012


Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more