Transformation of refractory ceramic MgAl2O4 into blue light emitting nanomaterials by Sr2+/Cr3+ activation

Abid ur Rehman Chaudhary, Tanzeela Fazal, Yosef Jazaa, Ali Bahadur, Shahid Iqbal, Mazloom Shah, Sajid Mahmood, Ahmad K. Badawi, Asad Muhammad Khan, Warda Shahzad, Bushra Ismail, Nasser S. Awwad, Hala A. Ibrahium

Research output: Journal PublicationArticlepeer-review

5 Citations (Scopus)


The current research aims at manipulation of physical properties of spinel MgAl2O4 by substitution of Sr2+ cations at tetrahedral and Cr3+ at orthogonal-sites. Synthesized materials were studied by XRD, TGA, SEM, EDX and UV–visible, diffuse reflectance and photoluminescence spectroscopy. A series of Sr2+ and Cr3+ doped derivatives with the general formula Mg1-xSrxAl2-yCryO4 (where x, y = 0.2, 0.4, 0.6, 0.8 and 1.0) have been produced and investigated using the co precipitation technique. Although strain in the cubic crystal structure of magnesium aluminate spinel was seen upon doping due to Sr2+'s higher cationic radius, the structure remained reserved (spinel) for low dopant concentration (x, y = 0.2, 0.4, 0.6). The behavior of activator ions Cr3+ in these derivatives is supposed to be altered due to change in site occupancy. Due to presence of antisites defects activator ions; structural, optical, thermal, electrical properties of MgAl2O4 material were modified.

Original languageEnglish
Article number117273
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Publication statusPublished - May 2024


  • Antisite defects
  • Luminescence
  • MgAlO
  • Optical properties
  • X-ray diffraction

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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