Open AccessGrowth kinetics and thermo-opto properties of manganese doped barium phosphate crystals
Author(s) -
Delma D’Souza,
N. Jagannatha,
K P Nagaraja,
A. S. Ganavi
Publication year - 2021
Publication title -
international journal of innovative research in physics
Language(s) - English
Resource type - Journals
eISSN - 2689-484X
pISSN - 2687-7902
DOI - 10.15864/ijiip.3103
Subject(s) - barium , materials science , orthorhombic crystal system , manganese , thermogravimetric analysis , thermal stability , phosphoric acid , crystallization , phosphate , inorganic chemistry , crystal structure , chemistry , crystallography , organic chemistry , metallurgy
Manganese doped barium phosphate (MDBP) crystals were grown by gel technique. Phosphoric acid impregnated silica (PIS) gel was optimized by varying gel parameters: pH, specific gravity of sodium meta silicate, concentration of acid and temperature of gelling solution. In an optimized growth environment, Ba 2+ -Mn 2+ cationic mixture was made to diffuse through the set PIS gel to nucleate with intrinsically available (PO 4 ) 3- ions, which yielded high quality MDBP crystals. Energy dispersive X-ray analysis confirmed the constitution of MDBP crystal by the prime elements Ba, Mn, P and O with cationic distribution 8.784 : 1 (Ba 2+ : Mn 2+ ). Fourier transform infrared spectral studies identified the phosphate group, water of crystallization and M-O (M= Ba 2+ , Mn 2+ ) bonds in the crystal armature. Thermogravimetric analysis demonstrated the degradation behavior and ensured the thermal stability upto 500°C in the phosphorus pentoxide state. MDBP crystals exhibited high crystalline nature and adjoined to orthorhombic geometry. The crystals being insulators, ingrained with high band gap energy of 6.08 eV.