Effect of lithium addition on thermal and optical properties of zinc–tellurite glass

Sm3+:Ag NPs assisted modification in absorption features of magnesium tellurite glass

“…This suggests the formation of large number of TeO 3+1 polyhedra. Furthermore, the occurrence of the peaks at 663 cm À1 and 772 cm À1 are related to the structural transformation of TeO 3+1 to TeO 4 tbp and TeO 3 tp units, respectively which is in well agreement with the earlier findings [41][42][43][44][45]. The stretching and bending vibrational modes of H-O-H in water are evidenced around 3355 and 1633 cm À1 , respectively.…”

Optical properties and weakening of elastic moduli with increasing glass transition temperature (T g) in (80–x)TeO2-xBaO-20ZnO glasses

“…In our work,similar dependence can be observed, in which NBO increased as BaO content increased;a saresult, E opt values to decreased. In our work,the increase in NBO due to BaO addition may be the reason why E u increased;thisfinding indicated that defect states increase [26]. In our work,the increase in NBO due to BaO addition may be the reason why E u increased;thisfinding indicated that defect states increase [26].…”

“…In our work,the increase in NBO due to BaO addition may be the reason why E u increased;thisfinding indicated that defect states increase [26]. The replacement of TeO 2 with lower optical basicity(0.99) [75] by BaO withhigher optical basicity (1.15) [16] causes NBO to increase;asaconsequence, polarizability and n are increased [26,76]. The replacement of TeO 2 with lower optical basicity(0.99) [75] by BaO withhigher optical basicity (1.15) [16] causes NBO to increase;asaconsequence, polarizability and n are increased [26,76].…”

“…Similar changes in x Li 2 O-20ZnO-(80-x )TeO 2 have been reported[26].The calculated values of longitudinal modulus ð C L Þ , shear modulus ð l Þ ,b ulk modulus ð K e Þ ,Y oung's modulus ð E Þ ,Debye temperature ð h D Þ ,hardness ð H Þ ,and Poisson's ratio ð r Þ of the samples usingEq. Similar changes in x Li 2 O-20ZnO-(80-x )TeO 2 have been reported[26].The calculated values of longitudinal modulus ð C L Þ , shear modulus ð l Þ ,b ulk modulus ð K e Þ ,Y oung's modulus ð E Þ ,Debye temperature ð h D Þ ,hardness ð H Þ ,and Poisson's ratio ð r Þ of the samples usingEq.…”

“…The band that appears in the spectral range of 425 -429 cm -1 corresponds to the bending vibration of Te -O-Teo r ZnO 4 units [26]; the spectral ranges of 543 -595, 607 -631, and 682 -695 cm -1 are attributed to symmetrical stretching vibrations of TeO 4 with bridging oxygen (BO) [57,58]. The peak at 773 -776 cm -1 is attributed to symmetric and asymmetric stretching vibration of TeO 3+1 or TeO 3 [24,26,29,58,59].…”