Application of a modified Pechini method for the synthesis of Ln(2)MGe(4)O(12) (Ln = Y, Eu; M = Ca, Zn, Mn) optical hosts

作者：Melkozerova Marina A; Tarakina Nadezda V^*; Maksimova Lidia G; Tyutyunnik Alexander P; Surat Ludmila L; Leonidov Ivan I; Zubkov Vladimir G; Zabolotskaya Elena V; Samigullina Rina F

来源：Journal of Sol-Gel Science and Technology, 2011, 59(2): 338-344.

DOI：10.1007/s10971-011-2508-6

• Pechini method
• Rare-earth germanates
• Optical hosts
• Scanning electron microscopy
• X-Ray powder diffraction

A modified Pechini method followed by conventional and microwave heating was used to synthesise the new promising Ln(2)MGe(4)O(12) (Ln = Y, Eu; M = Ca, Zn, Mn) optical hosts. Comparison between solid-state and Pechini synthesis methods showed that the latter reduces the temperature required for cyclo-tetragermanate formation. The highest yield of cyclo-tetragermanates for both methods is observed at 1,000-1,100 A degrees C, with significantly shorter time of annealing in the case of the Pechini synthesis. Compositional, structural and morphological characterisations of the samples obtained by both routes were carried out using X-Ray powder diffraction, thermogravimetry, electron spin resonance spectroscopy, energy-dispersive X-Ray spectroscopy and scanning electron microscopy.

• 出版日期2011-8