Single crystal growth of BaZrO3 from the melt at 2700 °C using optical floating zone technique and growth prospects from BaB2O4 flux at 1350 °C

We report the growth of BaZrO3 single crystals by the optical floating zone technique and the investigation on its flux growth using BaB2O4 as a solvent. 6 mm long colorless and transparent single crystals were obtained with a mirror furnace without the need for post-treatment annealing. Its propert...

Full description

Saved in:
Bibliographic Details
Published in:CrystEngComm 2019-01, Vol.21 (3), p.502-512
Main Authors: Cong Xin, Veber, Philippe, Mael Guennou, Toulouse, Constance, Valle, Nathalie, Hatnean, Monica Ciomaga, Balakrishnan, Geetha, Haumont, Raphael, Romuald Saint Martin, Velazquez, Matias, Maillard, Alain, Rytz, Daniel, Josse, Michael, Maglione, Mario, Kreisel, Jens
Format: Article
Language:English
Subjects:
Annealing furnaces
Barium zirconates
Calcium
Chemical composition
Chemical Sciences
Crystal growth
Czochralski method
Electric arcs
Floating structures
Flux
Glow discharges
High temperature
Investigations
Mass spectrometry
Material chemistry
Melting points
Organic chemistry
Phase transitions
Raman spectroscopy
Scientific imaging
Secondary ion mass spectrometry
Single crystals
Solvents
Strontium
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report the growth of BaZrO3 single crystals by the optical floating zone technique and the investigation on its flux growth using BaB2O4 as a solvent. 6 mm long colorless and transparent single crystals were obtained with a mirror furnace without the need for post-treatment annealing. Its properties are determined and compared with those of two commercial crystals grown by the tri-arc Czochralski method. The chemical composition was investigated using glow discharge mass spectrometry (GDMS) and secondary ion mass spectrometry (SIMS), which indicate minor impurities of Sr, Hf, Ca and Ti, with maximal concentrations for Sr and Hf in the range of 0.3–0.5% at. The optical band gap determined by UV-visible spectroscopy is found to be ∼4.8 eV and indicates the high quality of the BaZrO3 crystals grown by the optical floating zone technique. Raman spectroscopy at ambient conditions and at low temperatures down to 4.2 K reveals a relatively sharp second-order spectrum and does not reveal any structural phase transition. Prospective high-temperature solution growth using BaB2O4 self-flux was investigated and led to 150–200 μm BaZrO3 crystals. This solvent opens the way to grow BaZrO3 at half its melting point by the flux method.
ISSN:1466-8033
DOI:10.1039/c8ce01665h