H. K. Hassun^a,*, B. H. Hussein^a, B. K. H. Al-Maiyaly^a, R. H. Athab^a, Y. K. H. Moussa^b

Chalcogenide Letters, Vol.22, No.6, pp. 541-550, 2025, DOI:10.15251/CL.2025.226.541

Abstract Photoconductive possessions through the highly sensitive and responsive in lower applications apply voltages with a charge that effect the product for the photodetector utilizing Copper Sulfide was effective to fabricate and deposit by the means of thermal evaporation techniques following by the heat treatment with applications as the visible photodetector was described. Effects of doping to the antimony and aluminum on photo detectors property were estimated to be below illumination by the utilization of different power densities. The structure with the surface morphology properties was studied by XRD and AFM techniques, a clear effect of More >

Johanna Gaitán-Alvarez¹, Róger Moya^1,*, Alexander Berrocal¹, Karla J. Merazzo^1,2,3,4,5

Journal of Renewable Materials, Vol.13, No.4, pp. 799-816, 2025, DOI:10.32604/jrm.2025.058755 - 21 April 2025

Abstract The impregnation of nanoparticles magnetified into wood had been developed by different methods, like surface chemical coprecipitation and vacuum-pressure coprecipitation of magnetic nanoparticles (NPs). However, there is a lack of information on the best method to coprecipitation NPs. Then, the present study has the objective to measure the effects of the impregnation process of wood veneers through two in situ processes (immersion and vacuum-pressure) using a solution of FeCl₃·6H₂O, FeCl₂·4H₂O and ammonia in three tropical species (Pinus oocarpa, Vochysia ferruginea and Vochysia guatemalensis). It was measured the degree of synthesis of iron NPs using weight and density gains, Fe⁺³ absorption, emission… More > Graphic Abstract

Zhe Gong¹, Ge Yan², Jie Ma¹, Chang-Lin Yan², Fu-Kang Shen¹, Hu Li³, Hua-Ping Wang^1,*

Structural Durability & Health Monitoring, Vol.19, No.3, pp. 473-498, 2025, DOI:10.32604/sdhm.2024.057916 - 03 April 2025

Abstract Vacuum pressure vessels are one of the critical components in the aerospace field, and understanding the mechanical behavior feature is particularly important for safe operation. Therefore, it is meaningful to obtain the stress and strain distributions in the key positions of the vacuum tank, which can contribute to the safe performance assessment, operation efficiency, and fault analysis. Hence, this paper provides the distribution characteristics and variation rules of stress and tank strain of vacuum under different internal and external pressures through the elastic theoretical analysis and iteration method. The quasi-distributed fiber Bragg grating (FBG) sensors… More >

A. B. Alwany^a,*, A. Alnakhlani^a,b, B. Hassan^a,b, M. A. Algradee^a, R. A. Fouad^b, A. A. Alfaqeer^c

Chalcogenide Letters, Vol.21, No.1, pp. 99-112, 2024, DOI:10.15251/CL.2024.211.99

Abstract Thermal evaporation technique was used to prepare Cu₁₃Se₅₂Bi₃₅ thin films. The asdeposited and annealed samples were investigated by using the X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical transmission and reflection. The XRD showed that the as-deposited film is crystalline in nature, and the crystalline size of samples increased with increasing the annealing temperature. SEM images showed that the morphology of the sample changes with the annealing temperature. The direct transition of the optical band gap (E_g) of Cu₁₃Se₅₂Bi₃₅ films was observed and the values of E_g decreased with increasing the annealing temperature. Other optical parameters More >

G. S. Amirbekova^a, Zh. K. Tolepov^a,*, N. Guseinov^a, M. A. Tulegenova^a, T. Kuanyshbekov^b

Chalcogenide Letters, Vol.21, No.5, pp. 431-437, 2024, DOI:10.15251/CL.2024.215.431

Abstract Lead telluride nanostructures were obtained on silicon substrates by thermal evaporation in vacuum. Growth occurred at three different distances between the evaporation source and the substrate. The distances between the evaporator and the evaporation source were 5 cm; 7.5 cm and 10 cm. Structural characteristics were studied using XRD, SEM, EDX, AFM analyses. These methods provided information about the crystal structure, morphology, microstructure and elemental composition of the material. X-ray diffraction analysis showed that thin films of lead telluride obtained by thermal evaporation in vacuum have a cubic crystal structure. This experimental work was carried More >

Guizhou Liu^1,2, Chunze Yan^1,2,*, Yusheng Shi^1,2

The International Conference on Computational & Experimental Engineering and Sciences, Vol.30, No.4, pp. 1-1, 2024, DOI:10.32604/icces.2024.013340

Abstract High-volume-fraction SiC/Al (HVF-SiC/Al) have a wide range of applications in aerospace, optics, automotive and electronic packaging. However, because the hardness, brittleness and wear resistance increase with the increase in the volume fraction, it is difficult for traditional methods such as machining, to process HVF-SiC/Al composites to complex components. Therefore, in this paper, a novel method of the hybrid additive manufacturing is proposed to fabricate HVF-SiC/Al parts with complex structures. The effect of polymer infiltration and pyrolysis (PIP) on microstructure and properties of HVF-SiC/Al composites is investigated. The results show that the mechanical properties of the… More >

A. B. Alwany^a,b,*, G. M. Youssef^b, M. A. Algradee^a, M. A. Abdel-Rahim^c, A. Alnakhlani^a,d, B. Hassan^a,d

Chalcogenide Letters, Vol.20, No.1, pp. 19-31, 2023, DOI:10.15251/CL.2023.201.19

Abstract Thin films of Zn₅₀Se₅₀ were prepared by the vacuum evaporation technique on glass substrates. The influence of annealing temperature (T_ann.) on the structural and optical properties of ZnSe polycrystalline films was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical transmittance T (λ). The crystalline phases that were found in the Zn₅₀Se₅₀ thin films are ZnSe, Se and Zn. The refractive index (n) and the thickness of the films (d) were calculated using Swanepoel’s method for the films annealed at (423 K). The mechanism of optical absorption follows the rule of direct transition. The values More >

H. M. Ali^*, M. H. Mustafa

Chalcogenide Letters, Vol.20, No.6, pp. 431-437, 2023, DOI:10.15251/CL.2023.206.431

Abstract We investigated at the optical properties, structural makeup, and morphology of thin films of cadmium telluride (CdTe) with a thickness of 150 nm produced by thermal evaporation over glass. The X-ray diffraction study showed that the films had a crystalline composition, a cubic structure, and a preference for grain formation along the (111) crystallographic direction. The outcomes of the inquiry were used to determine these traits. With the use of thin films of CdTe that were doped with Ag at a concentration of 0.5%, the crystallization orientations of pure CdTe (23.58, 39.02, and 46.22) and More >

R. H. Athab, B. H. Hussein^*

Chalcogenide Letters, Vol.20, No.7, pp. 477-485, 2023, DOI:10.15251/CL.2023.207.477

Abstract Zinc Telluride ZnTe alloys and thin film have been fabricated and deposited on glass substrates by thermal evaporation method which may be a suitable window layer of zinc telluride with different annealing temperatures (373 and473) K for 60 minutes in vacuum. Deposited thin films with thickness 100 nm was characteristic by using X-ray diffraction XRD to know structures, Atomic Force Microscopy (AFM) to evaluate surface topology, morphology. It was found out that the vacuum annealing improves on thin ZnTe films structure and surface morphology. Structural analysis reveals that ZnTe films have zinc blende structure of More >

Guobing Xiong¹, Lu Hong², Zehui Ju³, Xiaoning Lu^3,*, Juwan Jin^3,*

Journal of Renewable Materials, Vol.11, No.9, pp. 3447-3461, 2023, DOI:10.32604/jrm.2023.027430 - 20 July 2023

Abstract The study characterized the curing behaviors of phenol formaldehyde (PF) resin under different vacuum degrees and explored the properties of 9-ply plywood panels hot-pressed under both vacuum and atmospheric conditions. The changes in core temperature and moisture content of the plywood mats during hot pressing were investigated as well. It was found that the gel times and gel temperatures of PF resin decreased with the increase of vacuum degree using a self-made device. FTIR spectra indicated the degree of polycondensation of hydroxymethyl gradually increased with the increase in temperature. It was also observed that a… More >