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Novel chalcogenide glasses of pseudo-binary (100 – x)Sb2S3–xCuI systems were synthesized by traditional melt-quenching method. The glass-forming region of Sb2S3-CuI system was determined ranging from x = 30 mol% to 40 mol%. CuI acts as a non-bridging modifier to form appropriate amount of [SbSI] structural units for improving the glass-forming ability of Sb2S3. Particularly, as-prepared glassy sample is able to transmit light beyond 14 μm, which is the wider transparency region than most sulfide glasses. Their physical properties, including Vickers hardness (H v), density (ρ), and ionic conductivity (σ) were characterized and analyzed with the compositional-dependent Raman spectra. These experimental results would provide useful knowledge for the development of novel multi-spectral optical materials and glassy electrolytes.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Glass formation and physical properties of Sb₂S₃–CuI chalcogenide system*

Ye¹,

Chen²,

Lin³

2021

“…Recently, ferroelectric (1 − x)Pb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 and (1 − x)Pb(Zn 1/3 Nb 2/3 )O 3 -xPbTiO 3 single crystals have attracted a great deal of attention due to their large piezoelectric properties, high electromechanical coupling factors, and field-induced strain response. [1][2][3][4][5][6][7][8] Moreover, the large piezoelectric coefficient is attractive for the photorefractive effect because the field-induced strain enhances the refractive index change via the photoelastic effect. [9] Therefore, ferroelectric single crystals with high electro-optic coefficients have practical applications in many optical devices, such as electro-optic modulators, switches, frequency shifters and light valves.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric and electro optic properties of tetragonal (1 − x )Pb(Mg _1/3 Nb _2/3 )O ₃ − x PbTiO ₃ single crystals by phenomenological theory

Qiu¹,

Wang²,

Yuan³

et al. 2015

An eighth-order Landau-Devonshire theory is constructed to investigate the piezoelectric and electro-optic properties of tetragonal (1−x)Pb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 single crystals (x = 0.38 and x = 0.4). The dielectric stiffness coefficients of the Landau potential are obtained by fitting to the dielectric properties and the phase transition temperature between cubic phase and tetragonal phase. It is indicated that tetragonal (1 − x)Pb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 single crystals have the firstorder cubic-tetragonal phase transitions. The dielectric constants are in great agreement with the experimental results. The piezoelectric coefficients d 33 and d 31 at room temperature are about 145 pC/N and −62 pC/N respectively which are smaller than that of (1 − x)Pb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 single crystals around the morphotropic phase boundary. Moreover, tetragonal (1 − x)Pb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 single crystals have the linear electro-optic coefficients r c = 33.7 pm/V and r c = 28.8 pm/V for x = 0.38 and x = 0.4, respectively which are in accordance with the measurements.

“…Large r can be achieved by using well-textured singledomain REBCO bulks, and high J c has been achieved by introducing strong flux pinning centers in the samples. [11][12][13][14][15][16] But for a given REBCO bulk superconductor, how do we achieve a large levitation force and a high levitation height? This is a key problem that needs solving for the levitation systems, especially for the superconducting maglev systems.…”

Section: Introductionmentioning

confidence: 99%

Effective method to control the levitation force and levitation height in a superconducting maglev system

Yang¹,

Yang²,

Wang³

et al. 2015

The influence of the width of the middle magnet in the permanent magnet guideways (PMGs) on the levitation force and the levitation height of single-domain yttrium barium copper oxide (YBCO) bulks has been investigated at 77 K under the zero field cooled (ZFC) state. It is found that the largest levitation force can be obtained in the system with the width of the middle magnet of the PMG equal to the size of the YBCO bulk when the gap between the YBCO bulk and PMG is small. Both larger levitation force and higher levitation height can be obtained in the system with the width of the middle magnet of the PMG larger than the size of the YBCO bulk. The stiffness of the levitation force between the PMG and the YBCO bulk is higher in the system with a smaller width of the middle magnet in the PMG. These results provide an effective way to control the levitation force and the levitation height for the superconducting maglev design and applications.