Dandan Wang
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Dandan Wang has a total of 7 co-authors. Here are the top co-authors by number of shared publications:
- Fengzi Zhou
School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
1 shared publication - Guo-Zhong Zang
School of Physics and Engineering, Henan University of Science and Technology, Luoyang, China
1 shared publication - J. H. Zhang
Henan University of Science and Technology
1 shared publication - Pengkun Wu
School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
1 shared publication - Xiaofei Wang
School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
1 shared publication - Xingzhong Cao
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
1 shared publication
Latest Publications
- Open Access
Effect of Defects on Piezoelectric Properties of Sm-Doped K0.47Na0.53NbO3 Ceramics
Rare earth element (Sm)-doped potassium sodium niobate (KNN)-based ceramics are fabricated using spark plasma sintering method and their properties are investigated. The results show that all the samples crystallize in a typical perovskite structure with a single orthorhombic phase. With increasing the Sm doping, the ceramics gradually shift toward the relaxor ferroelectric state and the value of dielectric loss angle tangent (tanδ) is smaller than 0.05 for x ≤ 0.003 ceramic samples. Meanwhile, the optimized piezoelectric charge coefficient d33 = 128 pC/N, and piezoelectric voltage coefficient g33 = 18.9 × 10−3 Vm/N are obtained when x = 0.001. Compared with the undoped sample, the d33 of x = 0.001 ceramics has been significantly enhanced by 28%. The positron annihilation lifetime results indicate that the main defect types in the ceramics are the A-site vacancies and defect dipoles. Based on the aforementioned results, the optimized piezoelectric performance and the lowest defect dipoles concentration in x = 0.001, may be attributed to the low internal oxygen vacancy concentration in it. This work may provide insights for the further study of KNN-based piezoelectric ceramics.
Open AccessEffect of Defects on Piezoelectric Properties of Sm-Doped K0.47Na0.53NbO3 Ceramics
Rare earth element (Sm)-doped potassium sodium niobate (KNN)-based ceramics are fabricated using spark plasma sintering method and their properties are investigated. The results show that all the samples crystallize in a typical perovskite structure with a single orthorhombic phase. With increasing the Sm doping, the ceramics gradually shift toward the relaxor ferroelectric state and the value of dielectric loss angle tangent (tanδ) is smaller than 0.05 for x ≤ 0.003 ceramic samples. Meanwhile, the optimized piezoelectric charge coefficient d33 = 128 pC/N, and piezoelectric voltage coefficient g33 = 18.9 × 10−3 Vm/N are obtained when x = 0.001. Compared with the undoped sample, the d33 of x = 0.001 ceramics has been significantly enhanced by 28%. The positron annihilation lifetime results indicate that the main defect types in the ceramics are the A-site vacancies and defect dipoles. Based on the aforementioned results, the optimized piezoelectric performance and the lowest defect dipoles concentration in x = 0.001, may be attributed to the low internal oxygen vacancy concentration in it. This work may provide insights for the further study of KNN-based piezoelectric ceramics.