Xi Wang's research while affiliated with Zhejiang University and other places
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Publications (3)
Ba[(Ca 0.2 Mg 0.2 Zn 0.2 Co 0.2 Ni 0.2 ) 1/3 Nb 2/3 ]O 3 and Ba[(Mg 0.25 Zn 0.25 Co 0.25 N i0.25 ) 1/3 Nb 2/3 ]O 3 perovskite single‐phase ceramics were synthesized by a solid‐state reaction method, and they were annealed at different temperatures in order to investigate the effect of B′‐site configurational entropy on phase stability, ordered doma...
Hf1‐xZrx)TiO4 and (Hf1‐xSnx)TiO4 ceramics were prepared through a standard solid‐state reaction route, and the microwave dielectric characteristics were determined together with the microstructures. The single‐phase solid solution in space group Pbcn was obtained in (Hf1‐xZrx)TiO4, while the two‐phase structure with (HfTiO4(s.s.) major phase in spa...
The crystal structure evaluation of Ba1−xSrxHfO3 and Sr1−yCayHfO3 ceramics with varying composition was determined together with its influence on microwave dielectric characteristics. The variation mechanism of temperature coefficient of resonant frequency (τf) was discussed in details, and the strong correlation between τf and bond valence sum (BV...
Citations
... The values of these constants are already reported in Refs. [70][71][72]. R is the average bond length obtained from the Rietveld refinement results. The degree of the Ti/Zr−O bond covalency increases from 38.441 to 38.756% with an increase in the Zr concentration as given in Table 3. ...
... 11,12 It is important to relate τ f to the characteristics of oxygen octahedra. To achieve the near-zero τ f , there are several primary approaches: (1) forming solid solutions or composites of end-members with opposite temperature coefficients 13 ; (2) adjusting oxygen octahedra tilting by substitution 10 ; (3) adjusting bond covalency by substation 14 ; (4) introducing phase transition and rattling effect, 15 and so on. ...
