Effect of green body annealing on laser performance of YAG:Nd3+ ceramics

Effect of green body annealing on laser performance of YAG:Nd3+ ceramics

Publication Type:

Journal Article

Source:

Ceramics International, Volume 44, Issue 4, p.4487-4490 (2018)

ISBN:

0272-8842

Abstract:

<p>Annealing temperature of green bodies has been shown to influence greatly the optical properties and laser characteristics of Y3Al5O12:Nd3+ (1 at%) ceramics. Increase the annealing temperature above some critical one (800 degrees C) results in appearance of submicron pores due to Y4Al2O9 phase formation accompanied by specific volume expansion. The energy changes associated with the chemical reaction can lead to the development of microstructures that possess lower sinterability. As a result, Y3Al5O12:Nd3+ ceramics prepared from unannealed green bodies and those annealed at 600 and 800 degrees C possess higher optical transmittance and enhanced slope efficiency (63-67%) compared with that obtained using green bodies annealed at 1000 degrees C (41%). Further investigations are necessary in order to explain this behavior.</p>