JOURNAL OF ALLOYS AND COMPOUNDS
·
2012
·
IF 2.289
Hui Hu,Yan Bai
In this study, TeO 2 :Tm 3+ /Er 3+ /Yb 3+ nanoparticles had been successfully prepared via a hydrothermal process. All the as-prepared TeO 2 :Tm 3+ /Er 3+ /Yb 3+ nanoparticles showed the blue (476 nm), green (525 nm, 545 nm) and red (667 nm) emissions under 980 nm excitation, which were attributed to the 1 G 4 → 3 H 6 (Tm 3+ ), 2 H 11/2 , 4 S 3/2 → 4 I 15/2 (Er 3+ ) and 4 F 9/2 → 4 I 15/2 (Er 3+ ) transitions, respectively. The decay lifetime of blue, green and red emissions were 40 μs, 46 μs and 89 μs, respectively. The combination of blue, green and red emissions resulted in the white luminescence which was intense and visible to the naked eyes. The calculated CIE color coordinates of TeO 2 :Tm 3+ /Er 3+ /Yb 3+ nanoparticles fell well within the white region and changed little with the incident pump power from 1.75 W/cm 2 to 16.13 W/cm 2 , which indicated that the materials may have potential applications in the fields of three dimensional displays, back lighting, white light sources, and so on.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2022
·
IF 4.458
Yichen Ye,Yongbao Xiao,Yao Ji,Weichao Wang
Tellurite-based glass composed of TeO 2 -Ta 2 O 5 -ZnO (labeled as TTZ) is explored as the host material for a potential 2.7 μm fiber laser. It is found that the glass-forming region, structural and physical properties of TTZ glass undergo considerable changes when platinum crucible are adopted to prepare glass instead of alumina one. Especially, the Er 3+ -doped TTZ glass that melted in platinum crucible exhibits relatively larger absorption and emission cross-sections at 2.7 μm than that of alumina one. Further studies show that an enhanced 2.7 μm luminescence can be achieved from the heavily Er 3+ -doped TTZ glass, the absorption and emission cross-sections, figure of merit and maximum gain coefficient of Er 3+ -doped TTZ-Pt glasses at 2.7 μm are calculated to be 0.91 × 10 −20 and 1.01 × 10 −20 cm 2 , 3.18 × 10 −24 cm 2 ·s and 2.25 cm −1 , respectively, indicating that the Er 3+ -doped TTZ glass may be a promising candidate host for mid-infrared fiber lasers.
研究领域:
材料科学
·
光学
·
光子学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2015
·Vol. 2015
·期 24
·4062-4067
·
IF 2.942
Qi Li,Yi He,Rufang Peng
Graphical The high-temperature thermal decomposition (HTD) of ammonium perchlorate (AP) is decreased by 104.4 °C if the TeO 2 nanoparticle/graphitic carbon nitride (g-C 3 N 4 ) hybrids are added to AP. Furthermore, a Lewis acid–base interaction catalytic mechanism is proposed to illustrate the thermal decomposition of AP; CB = conduction band, VB = valence band, h + = hole, LTD = low-temperature thermal decomposition. TeO 2 nanoparticle-loaded graphitic carbon nitride hybrids (TeO 2 NPs/g-C 3 N 4 ) were successfully prepared by a calcination strategy. Various characterization and detection techniques were used to analyze its structure and properties. It was found that upon the addition of 10 wt.-% of the as-prepared hybrids, the onset decomposition temperature of ammonium perchlorate (AP) decreased by 104.4 °C. In addition, the addition of TeO 2 NPs resulted in an increase in the surface area up to 8.8 m 2 g –1 for g-C 3 N 4 , which is three times larger than that of the bulk g-C 3 N 4 (2.8 m 2 g –1 ). Furthermore, g-C 3 N 4 reacted with HClO 4 by Lewis acid–base interaction, which resulted in separation of HClO 4 from AP lattice. Notably, the separation of the HClO 4 gas molecule led to continued decomposition of AP, as this decomposition reaction is reversible. With this in mind, a catalytic mechanism based on Lewis acid–base interaction was proposed to illustrate the catalytic process in the thermal decomposition of AP.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiangchao Zhao,Yuansong Luo,Xiujian Zhao
NASICON-type solid electrolyte Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) has become an excellent substitute for organic liquid electrolytes due to its high ionic conductivity and exceptional air stability. However, its application is limited by its poor sintering characteristics and high grain boundary resistance. In this study, TeO 2 was introduced into LATP as a sintering aid to promote its sintering, and its properties were measured by XRD , SEM, XPS, EIS and dilatometry . The results show that the addition of TeO 2 can form eutectic liquid phase in LATP ceramic pellets during sintering, thus effectively promoting particle sintering. Not only the grain size was greatly increased, but also grain boundary and pore defects were reduced. With the help of TeO 2 , the performance of LATP is greatly improved when sintered at only 750 °C, the relative density and total ionic conductivity reached 90.64% and 0.207 mS/cm, respectively. The highest total ionic conductivity of 0.279 mS/cm and the highest relative density of 93.81% were obtained when sintered at 800 ℃ and 950 ℃, respectively. However, due to the volatilization of Li and Te at high temperature, the relative density and total ionic conductivity of LATP with TeO 2 added sintered at high temperature have only a small increase compared to that without addition. In conclusion, this study provides a feasible scheme for improving LATP performance.
研究领域:
材料科学
·
电化学
·
固体物理
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2011
·
IF 1.679
Hui Hu,Yan Bai,Minwen Huang,Biyin Qin,Jie Liu,Wenjie Zheng
Different crystal structure of TeO 2 nanoparticles were used as the host materials to prepare the Er 3+ /Yb 3+ ions co-doped upconversion luminescent materials. The TeO 2 nanoparticles mainly kept the original morphology and phase after having been co-doped the Er 3+ /Yb 3+ ions. All the as-prepared TeO 2 :Er 3+ /Yb 3+ nanoparticles showed the green emissions (525 nm, 545 nm) and red emission (667 nm) under 980 nm excitation. The green emissions at 525 nm, 545 nm and red emission at 667 nm were attributed to the 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions of the Er 3+ ions, respectively. For the α-TeO 2 :Er 3+ /Yb 3+ (3/10 mol%) nanoparticles, three-photon process involved in the green ( 2 H 11/2 → 4 I 15/2 ) emission, while two-photon process involved in the green ( 4 S 3/2 → 4 I 15/2 ) and red ( 4 F 9/2 → 4 I 15/2 ) emissions. For the β-TeO 2 :Er 3+ /Yb 3+ (3/10 mol%) nanoparticles, two-photon process involved in the green ( 2 H 11/2 → 4 I 15/2 ), green ( 4 S 3/2 → 4 I 15/2 ) and red ( 4 F 9/2 → 4 I 15/2 ) emissions. It suggested that the crystal structure of TeO 2 nanoparticles had an effect on transition processes of the Er 3+ /Yb 3+ ions. The emission intensities of the α-TeO 2 :Er 3+ /Yb 3+ (3/10 mol%) nanoparticles and β-TeO 2 :Er 3+ /Yb 3+ (3/10 mol%) nanoparticles were much stronger than those of the (α + β)-TeO 2 :Er 3+ /Yb 3+ (3/10 mol%) nanoparticles.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·
IF 2.6
yufei Song,Xiaojie Guo,Wenxiang Mu,Xutang Tao,Zeliang Gao
β-Ga2O3 is an ultra-wide bandgap semiconductor with immense potential applications in high voltage, electronic devices, and deep-ultraviolet optoelectronic devices, etc. However, to date, the growth of bulk β-Ga2O3 crystals has predominantly utilized melt methods, which are heavily dependent on specific growth vessels. In this work, bulk crystal β-Ga2O3 with a size of 7 × 13 × 4 mm3 is grown using TeO2-Li2CO3 as flux by a top-seeded solution growth (TSSG) method for the first time. It is noteworthy that the saturation point of β-Ga2O3 in the flux has been reduced to 1023 K, significantly lower than its melting point of 2073 K. The resulting β-Ga2O3 crystal exhibits well-formed faces, predominantly the (010), (100), (01(-)1), and (11(-)1(-)) forms, which closely align with the ideal morphological predictions made by the Bravais-Friedel and Donnay-Harker methods.The full-width at half maximum (FWHM) of the rocking curves for the (010) oriented plane is determined to be 140.4″. This work provides a potential β-Ga2O3 crystal growth method with a little platinum loss at a low temperature.
研究领域:
材料科学
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2017
·
IF 2.124
Idris Kabalci,Jiayu Zheng,Liping Wang,Linling Tan,Yafei Xue,Ziyang Zhang,Mingying Peng
Tellurite based glasses have been prepared with various glass compositions such as yBi 2 O 3 -xZnO-(100 − x − y)TeO 2 glass system (y = 0.2, 1.0, 2.0, 3.0, 4.0, 5.0, and 8.0 mol% ratio and x = 14, 19, 19.8, and 20 mol%). The purpose of the work is to investigate the effect of glass compositions on the structure and hardness under the indentation loading test. Up till now, the experiences of the preparation of tellurite based glasses showed that it has high fragility structure at room temperature compared to boroxide, and chalcogenide-based glass materials . In this study, the thermal, mechanical and structural properties of Bi - based tellurite optical glass materials were investigated at room temperature. Results indicated that increased refractive index ratio of Bi has pronounce effect upon the transition temperature while the hardness value of the lassy material showed a reduction in response to this increased refractive index value of Bi. The obtained results further could be correlated with compositions that effects on the structural changes [for TeO 4 (tbp) to TeO 3 (tb)] having non-binding oxygen (NBO) due to the elastic deformation of Te O bonding and expansion of interatomic distances when considered the data of the Vickers' hardness, FT-IR, and Raman spectra . Here, it can also be emphasized that obtained the thermal stability, (T = T x − T g ), of the glass material, decreases from 80 to 37 °C as the melting temperature increases from 800 to 1025 °C, possibly leading to a decrease in microhardness and deformation in the glass materials.
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Shupeng Sun,Xinlei Li,Yanhui Sun,Nan Wang,Baoyu Huang,Xiaogan Li
Tellurium nanotubes (TeNT) heterojunction with Tellurium oxide (TeO 2 ) were prepared by in situ oxidation at elevated temperatures in air. The chemiresistive type NO 2 sensor was then fabricated by depositing the synthesized TeNT/TeO 2 on the integrated gold electrodes. The response of the TeNT/TeO 2 based sensor to 600 ppb NO 2 was 38.8 %, which was about 3.2 times higher than that of the single-phase TeNT based sensor (12.1 %). The response and recovery time are 39 s and 49 s, respectively, which are substantially reduced compared to those of the pristine TeNT based sensor (133 s and 336 s) and the results reported in literature. The sensor also exhibits good stability with a response deviation of less than 2 % for 45 days and a good resistance to environmental disturbances. The improved sensor performance can be attributed to the heterojunction formed between TeNT and TeO 2 . Density Functional Theory (DFT) calculations show that the formed TeNT/TeO 2 heterojunction enhances the adsorption energy (-0.671 eV) and charge transfer (0.49 |e|) between NO 2 and the TeNT/TeO 2 .
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Advances
·
2024
·Vol. 5
·期 7
·3022-3028
·
IF 5.2
Lu Han,Chao Liu,Xiaoli Wang,Feiyu Li,Chuanyan Fan,Junjie Zhang
α-TeO2 is widely used in acousto-optic devices due to its excellent physical properties. Conventionally, α-TeO2 single crystals were grown using melt methods. Here, we report for the first time the growth of α-TeO2 single crystals using an aqueous solution method below 100 °C. The solubility curve of α-TeO2 was measured, and then single crystals with dimensions of 3.5 × 3.5 × 2.5 mm3 were successfully grown using seed crystals that were synthesized from spontaneous nucleation. The as-grown single crystals belong to the P41212 space group, evidenced by single crystal X-ray diffraction and Rietveld refinement on powder diffraction. Rocking curve measurements show that the as-grown crystals exhibit high crystallinity with a full-width at half maximum (FWHM) of 57.2′′. Ultraviolet-visible absorption spectroscopy indicates that the absorption edge is 336 nm and the band gap is estimated to be 3.69 eV. The density and Vickers hardness of the as-grown single crystals are measured to be 6.042 g cm−3 and 404 kg mm−2, respectively. Our findings provide an easy-to-access and energy-saving method for growing single crystals of inorganic compounds.
研究领域:
材料科学
·
晶体生长
·
声光器件
·
无机合成
·
光学性能
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 34
·13632-13638
·
IF 5.7
Wenjing Tan,Xuefan Wang,Ruqing Wei,Hongbo Huang,Daqing Yang,Ying Wang,Bingbing Zhang
Nonlinear optical (NLO) crystals are crucial components in all-solid-state lasers because they expand the wavelengths of existing laser sources through laser frequency conversion. In this work, Ag2[TeO2(OH)4] was identified in tellurates using the first-principles high-throughput screening pipeline for NLO materials (FHSP-NLO). The material was successfully produced via mild aqueous solution synthesis conditions, and a single crystal of 8 × 4 × 4 mm3 in size was obtained. Ag2[TeO2(OH)4] is one of the few materials that contains the [TeO2(OH)4]2− anionic group and belongs to the non-centrosymmetric (NCS) space group. Ag2[TeO2(OH)4] exhibited balanced comprehensive performances, including a large second harmonic generation (SHG) response of about 0.84 × AgGaS2 (AGS), moderate band gap (2.73 eV) and large birefringence (0.106@1064 nm). First-principles studies revealed that the dominant units that contribute to the crystal's linear and nonlinear optical properties are Ag atoms and TeO2(OH)4 groups.
研究领域:
材料科学
·
光学
·
无机化学
·
计算物理
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yufei Song,Fuai Hu,Peng Zhao,Yang Li,Feifei Guo,Ziyi Liu,Zeliang Gao
Accurately probing the interiors of curved objects with direct X-ray detection remains a formidable challenge. Here, a novel Ga2O3–TeO2 glass (GTOG) with the advantages of shape-controllable, large-area preparation, and a simple preparation process has been developed. Owing to its high electrical resistivity and carrier mobility-lifetime product, a flat-panel GTOG detector exhibits an ultralow detection limit of 8.579 nGyair s–1 and a high sensitivity of 321.47 μC Gy–1 cm–2 under 40 keV X-ray radiation. Furthermore, under 120 keV X-ray radiation, the sensitivity of the GTOG X-ray detector is enhanced to 484.98 μC Gy–1 cm–2 at 175 °C, which has potential applications in high-temperature environments. Leveraging its shape-controllability, we fabricated a curved X-ray detector using a low-temperature melting process. The curved array detector demonstrates significantly clearer and less distorted images in curved object detection compared to those of the flat-panel detector. This achievement suggests that a glass with adjustable bending radii can serve as a paradigm for future shapeable X-ray detectors, unlocking new possibilities for three-dimensional (3D) curved X-ray imaging.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Dewei Ma,Panli Zhu,Jun Huang,Xiuhua Cao
The research on low-temperature lead-free glass is of great significance for the miniaturization, integration and intelligence of current electronic products, as well as environmental protection. In this article, we report the preparation of low-temperature lead-free B 2 O 3 -BaO-ZnO-SiO 2 -Al 2 O 3 -TeO 2 glasses by a melt-quenching technique. With the increase of TeO 2 content in glass, the glass transition temperature and melting temperature of sintered glass powder decrease, while its wettability and acid corrosion resistance show an increasing trend. The application of glass powder in the sintering experiment of terminal electrode slurry further proves this viewpoint. Compared with the poor sintering performance of the slurry with TeO 2 -free glass powder, the slurry containing TeO 2 glass powder forms a very dense sintered solid, and the sintered slurry is tightly bonded to the ceramic substrate .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）