Novel series of MLa2WO7(M = Sr, Ba) microwave dielectric ceramic systems with monoclinic structures

Zhou, Xiang; Zhou, Huanfu; Wu, Qiang; Luan, Xiaowen; Hu, Sang; Deng, Jiji; Li, Shixuan; Wang, Kuangguo; Chen, Xiuli

doi:10.1007/s10854-020-03633-y

Cited by 10 publications

(3 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unit cell parameters are a = 6.0219(3) Å, b = 6.0218(3) Å, c = 8.5167(3), β = 90.01(3)°, and V = 308.84(3) Å 3 . The detected impurity phases are BaPr 2 WO 7 ceramics (3.97%) with a structure similar to that of SrLa 2 WO 7 (JCPDS 049-0353) and Pr 2 O 3 (0.32%) …”

Section: Resultsmentioning

confidence: 99%

“…The detected impurity phases are BaPr 2 WO 7 ceramics (3.97%) with a structure similar to that of SrLa 2 WO 7 (JCPDS 049-0353) and Pr 2 O 3 (0.32%). 39 …”

Section: Resultsmentioning

confidence: 99%

“…The best Rietveld refined fit to the experimental pattern was obtained for 95.71% structure similar to that of SrLa 2 WO 7 (JCPDS 049-0353) and Pr 2 O 3 (0.32%). 39 A possible alternative to the I2/m SG is R-3, with the following unit cell parameters: a = b = 6.0219(4) Å, c = 14.7509(8) Å, and V = 463.26(1) Å 3 , for which the error factor is only slightly greater (χ 2 = 42.2 for I2/m and 43.1 for R-3). The refined fit to the same XRD experimental data and the derived structure are presented in Figure S2.…”

Section: Powder Xrdmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and Properties of the Ba₂PrWO₆ Double Perovskite

Wlodarczyk,

Amilusik,

Kosyl

et al. 2024

Inorg. Chem.

View full text Add to dashboard Cite

We report details on the synthesis and properties of barium praseodymium tungstate, Ba 2 PrWO 6 , a double perovskite that has not been synthesized before. Room-temperature (RT) powder X-ray diffraction identified the most probable space group (SG) as monoclinic I2/m, but it was only slightly distorted from the cubic structure. X-ray photoelectron spectroscopy confirmed that the initial (postsynthesis) material contained praseodymium in both 3+ and 4+ charge states. The former (Pr 3+ ) disappeared after exposure to UV light at RT. Photoluminescence studies of Pr 3+ revealed that Ba 2 PrWO 6 is an insulator with a band gap exceeding 4.93 eV. Pressure-dependent Raman spectroscopy excluded the possibility of a phase transition up to 20 GPa; however, measurements between 8 and 873 K signified that there might be a change toward the lower symmetry SG below 200 K. Electron paramagnetic resonance spectra revealed the presence of interstitial oxygen which acts as a deep electron trap.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The detected impurity phases are BaPr 2 WO 7 ceramics (3.97%) with a structure similar to that of SrLa 2 WO 7 (JCPDS 049-0353) and Pr 2 O 3 (0.32%). 39 …”

Section: Resultsmentioning

confidence: 99%

Section: Powder Xrdmentioning

confidence: 99%

See 1 more Smart Citation