4.6 Article

Thermal analysis analysis and mechanism of formation of Zn2SiO4:Mn phosphor under heating of synthetic hemimorphite

Journal

MATERIALS RESEARCH BULLETIN
Volume 129, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2020.110890

Keywords

Oxides; Luminescence; Differential scanning calorimetry (DSC); Thermogravimetric analysis (TGA); X-ray diffraction

Funding

  1. State Contract of the Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences [AAAA-A19-119031890026-6]

Ask authors/readers for more resources

Detailed study of thermal decomposition of synthetic hemimorphite was performed to understand the process formation of metastable and stable structural modifications of Zn2SiO4:Mn phosphor. X-ray powder diffraction, differential-thermal and thermogravimetric methods are demonstrated that dehydration product of Zn-4[Si2O7] (OH)(2)center dot H2O at 680 degrees C is mixture of metastable beta-Zn2SiO4 and alpha-Zn2SiO4. M further heating, metastable phase undergoes transition to alpha-Zn2SiO4 at 873 degrees C. Luminescence spectrum of Zn2SiO4:Mn in phase coexistence region is wide band with two maxima, which explains the loss of purity of green glow of phosphor. Luminescence spectrum of sample annealed at the higher temperature is represented by single maximum, corresponding to green emission of alpha-Zn2SiO4:Mn. Identification of thermal effects indicates that at 1500 degrees C alpha-Zn2SiO4 turns into stable beta-Zn2SiO4 and exists up to melting point 1512 degrees C. Information on phase transition of stable modifications alpha-Zn2SiO4 -> beta-Zn2SiO4 complements phase equilibrium diagram of system SiO2-ZnO.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available