Metathetic room temperature preparation and characterization of scheelite-type ABO4 (A = Ca, Sr, Ba, Pb; B = Mo, W) powders

Upconversion photoluminescence properties of SrY2(MoO4)4:Er3+/Yb3+ phosphors synthesized by a cyclic microwave-modified sol–gel method

“…A similar impurity phase was also observed in the case of Er 3+ /Yb 3+ doped SrMoO 4 phosphor [28]. This suggests that the cyclic microwave-modified sol-gel route is suitable for the growth of SrY 2 (MoO 4 ) 4 :Er 3+ /Yb 3+ crystallites and developing the high intensity peaks well related to the (1 1 2), (2 0 4), and (3 1 2) planes of SrMoO 4 [26][27][28]. Post heat-treatment plays an important role in a well-defined crystallized morphology.…”

“…The 514.5-nm line of an Ar ion laser was used as an excitation source, and the power on the samples was kept at 0.5 mW. [26,27], which are in good agreement with the crystallographic data of SrMoO 4 (JCPDS 08-0482). The foreign reflexes marked with an asterisk in Fig.…”

Evolution of photoluminescence as a function of the structural order or disorder in CaMoO4 nanopowders

“…CaMoO 4 scheelite-type crystalline phase and MoO 3 admixture phase were identified at 400°C. 4,[24][25][26][27] As the calcination temperature increased, the ͑021͒ diffraction peak, which is the maximum peak of the MoO 3 metastable phase ͑2 at around 27.4°͒, disappeared and only the reflection peaks corresponding to CaMoO 4 crystalline phase remained. All the diffraction peaks were indexed according to the Joint Committee for Powder Diffraction Standard ͑JCPDS͒ database and indicated a scheelite-type tetragonal symmetry.…”

Recent advances in strontium tungstate scheelite material

“…The methods to fabricate strontium tungstate particles can be generally categorized into two types: one is a liquid-solution routine [11][12][13][14][15][16][17][18][19][20][21][22], the other is a molten flux process [23]. With the control of preparation conditions, the morphology of strontium tungstate particles is easy to be fabricated into peach-like, dump-like, bundle, rice grain-like, peanut-like, and rod-like particles ( Figure 3).…”