Raman spectra of acoustooptic NaBi(MoO4)2

Moiseenko, V. N.; Bogatirjov, Yu. I.; Jeryemenko, A. M.; Akimov, S. V.

doi:10.1002/1097-4555(200006)31:6<539::aid-jrs550>3.0.co;2-g

Cited by 19 publications

(10 citation statements)

References 4 publications

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“…A g , B g and E g modes are Raman active; A u and E u modes are IR active and B u modes are inactive. [36][37][38] As seen in Fig. 5(a), the strongest mode is around 876.6 cm À1 and assigned to the v s (MoO 4 ) and the weaker mode near 757 cm À1 is assigned to v as (MoO 4 ).…”

Section: Resultsmentioning

confidence: 85%

Phase transition, Raman spectra, infrared spectra, band gap and microwave dielectric properties of low temperature firing (Na0.5xBi1−0.5x)(MoxV1−x)O4 solid solution ceramics with scheelite structures

Zhou¹,

Pang²,

Wang³

et al. 2011

J. Mater. Chem.

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Section: Resultsmentioning

confidence: 85%

Phase transition, Raman spectra, infrared spectra, band gap and microwave dielectric properties of low temperature firing (Na0.5xBi1−0.5x)(MoxV1−x)O4 solid solution ceramics with scheelite structures

Zhou¹,

Pang²,

Wang³

et al. 2011

J. Mater. Chem.

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“…Further more, the SiO 2 phase is additionally formed in the pores of these nanocomposites Derhachov et al, 2019). Raman spectra opal nanocomposites -NaBi(MoO 4 ) 2 , opal -Pb 3 (P 0.5 V 0.5 O 4 ) 2 , shown in Figure The spectra indicate the frequencies of characteristic bands for crystals NaBi(MoO 4 ) 2 (Moiseenko et al, 2000) and Pb 3 (P 0.5 V 0.5 O 4 ) 2 (Hardcastle & Wachs, 1992;Salje & Iishi, 1977). The intensities of the spectra measured at different points to the (111) surface of the sample differed.…”

Section: Resultsmentioning

confidence: 97%

“…Raman spectra of initial crystals of active dielectrics were studied in detail by different research groups (Bi 12 SiO 20 (Venugopalan & Ramdas, 1972), Bi 2 TeO 5 (Domoratskii et al, 2000), TeO 2 (Champarnaud-Mesjard et al, 2000), NaBi(MoO 4 ) 2 (Moiseenko, Bogatirjov, Jeryemenko, & Akimov, 2000), Pb 3 (P 0.5 V 0.5 O 4 ) 2 (Salje & Iishi, 1977)).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Structural Properties of Nanocomposites Based on Synthetic Opals and Active Dielectrics

Sal¹

2019

APR

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This work is devoted to generalize and analyze the previous results of new photonic-crystalline nanomaterials based on synthetic opals and active dielectrics. Data were characterized by X-ray diffraction and Raman spectroscopy. Active dielectrics infiltrated into the pores of the opal from the melt. The phase structure composition of the infiltrated materials into the pores of the opal matrix were analyzed. The results of x-ray diffraction and Raman spectra allowed to establish the crystal state of active dielectrics in the pores of the opal. The Raman spectra of some opal-active dielectric nanocomposites revealed new bands and changes in band intensities compared to the spectra of single crystals of active dielectrics. Further more, differences in band intensities in the spectra were measured at different spots of the sample's surface were observed. The revealed changes were attributed to the formation of new crystalline phases due to the injected dielectrics in opal pores.

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“…In addition, the band at 354 cm -1 can be attributed to the vibration of ν2(MoO4) + ν4(MoO4), whereas the band near 463 cm -1 can be assigned to Li-O stretching vibration and O-Si-O bending vibration. Furthermore, the band located around 952 and 1122 cm -1 can be owing to the symmetric stretching mode of MoO4 tetrahedra and O−Si−O bonds, respectively [31][32][33][34]. Overall, the Raman spectra of Li2MoO4 and SiO2 can be well-defined in Fig.…”

Section: Fig 2 Rietveld Analysis Of the Li2moo4-(1+δ)sio2mentioning

confidence: 86%

The structure and microwave dielectric properties of Li2MoO4-SiO2 ceramics without addition of glass as sintering aids

Lai

Tang

Zhang

et al. 2018

Trans. Mat. Res. Soc. Japan

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SiO2 ceramic is one of the most important candidate materials for high-frequency microwave ceramics with very low dielectric constant (εr) at around 3.8 and low dielectric loss. However, a high sintering temperature must be provided during the preparation, which restricted their further application in low temperature co-fired ceramic (LTCC) field. In the present work, Li2MoO4-(1+δ)SiO2 (δ =-0.5,-0.2, 0, 0.2, 0.5 mole) ceramics were prepared by solid-state reaction method and sintered at 800 °C. XRD, SEM, EDS and Raman spectroscopy techniques were used to study the phase composition and crystal structure. The ceramic samples were composed of both Li2MoO4 and SiO2 phases. The εr values decrease with increased δ, which agree with the Lichtenecker logarithmic rule. The quality factor (Q×f) value initially increased and then decreased with increased δ. When evaluated as a microwave dielectric material, the Li2MoO4-(1+δ)SiO2 ceramics show excellent dielectric performance with a low dielectric constant (εr = 4.807) and high Q×f values of ~21000 GHz at δ = 0 as sintered at 800 °C, which is a possible candidate for LTCC.

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Raman spectra of acoustooptic NaBi(MoO4)2

Cited by 19 publications

References 4 publications

Phase transition, Raman spectra, infrared spectra, band gap and microwave dielectric properties of low temperature firing (Na0.5xBi1−0.5x)(MoxV1−x)O4 solid solution ceramics with scheelite structures

Phase transition, Raman spectra, infrared spectra, band gap and microwave dielectric properties of low temperature firing (Na0.5xBi1−0.5x)(MoxV1−x)O4 solid solution ceramics with scheelite structures

Synthesis and Structural Properties of Nanocomposites Based on Synthetic Opals and Active Dielectrics

The structure and microwave dielectric properties of Li<sub>2</sub>MoO<sub>4</sub>-SiO<sub>2</sub> ceramics without addition of glass as sintering aids

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