Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.
I. MIRON1,2, I. GROZESCU1,2,*
Zn1-xCoxAl2O4 (x = 0.05 and 0.1) pigment was synthesized by hydrothermal method and then annealed at 1000ºC. The samples prepared by hydrothermal method exhibit a green colour specific for octahedrally coordinated Co3+ ions. After annealing at 1000ºC, samples changed the colour from green to blue which is the specific colour for tetrahedrally coordinated Co2+ ions. The X-ray diffraction analysis showed a single spinel phase and no trace of impurities. The average crystallite size was found to be around 40 nm (x = 0.05) and 38 nm (x = 0.1). Atomic force microscopy measurements confirmed the nanosize of the particle. Absorbance spectra showed three peaks centered at 620, 593 and 547 nm attributed to the 4A2(F)→4T1(P) transition..
Cobalt, Gahnite, Pigment, Hydrothermal method.
I. MIRON, I. GROZESCU, Cobalt-doped gahnite synthesized by hydrothermal method, Optoelectronics and Advanced Materials - Rapid Communications, 6, 9-10, September-October 2012, pp.931-934 (2012).
Submitted at: Aug. 1, 2012
Accepted at: Sept. 20, 2012
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
Active accounts were imported to the new platform and assigned a random password by default. In order to access your account you need to access the login page and go through the Lost Password dialog (involves the system sending you an email with instructions) in order to reset your password. This step is necessary as passwords are kept in hashed form and the new platform uses modern hashing algorithms incompatible with the previous ones.