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Online since: March 2010
Authors: Xiao Hua Sun, Ping Feng, Jun Zou, Min Wu
Dielectric Tunable Properties of Ba0.6Sr0.4TiO3 Thin Films with and
without LSCO Buffer Layer
Xiaohua Suna, Ping Feng, Jun Zou, Min Wu
School of Mechanical and Material Engineering, China Three Gorges University, Yichang 443002,
China.
a mksxh@yahoo.com.cn Keywords: BST thin films, LSCO buffer layer, PLD, dielectric tunable properties.
The influence of LSCO buffer layer on the microstructure, dielectric and tunable properties of BST thin films were analyzed.
It is found that the dielectric constants and dissipation factors of the BST films with and without LSCO buffer layer are not strongly dependent on the frequency in this frequency range.
However, there are some differences in the dielectric properties between two films.
a mksxh@yahoo.com.cn Keywords: BST thin films, LSCO buffer layer, PLD, dielectric tunable properties.
The influence of LSCO buffer layer on the microstructure, dielectric and tunable properties of BST thin films were analyzed.
It is found that the dielectric constants and dissipation factors of the BST films with and without LSCO buffer layer are not strongly dependent on the frequency in this frequency range.
However, there are some differences in the dielectric properties between two films.
Online since: August 2013
Authors: Jian He Peng, Pin Kang Xie, Bo Ya Dong
The foundation soil condition and the hydrogeological condition are the principal influence factors that result in the cracking problems.
Table 1 Material physical and mechanical parameter table Item Density [KN/m3] Elasticity modulus [MPa] Poisson’s ratio Tensile strength [MPa] Compressive strength [MPa] C35 concrete 23 31500 0.27 1.57 16.7 Expansive soil 19.5 17.5 0.2~0.35 / / Geomorphology.
The physical and mechanical property parameters of each material are listed in Table 1.
The area affected by the groundwater becomes larger and the cracks in these area may develop with the increasing waterhead level.
The simulation of system affected by the three influencing factors together is carried out.
Table 1 Material physical and mechanical parameter table Item Density [KN/m3] Elasticity modulus [MPa] Poisson’s ratio Tensile strength [MPa] Compressive strength [MPa] C35 concrete 23 31500 0.27 1.57 16.7 Expansive soil 19.5 17.5 0.2~0.35 / / Geomorphology.
The physical and mechanical property parameters of each material are listed in Table 1.
The area affected by the groundwater becomes larger and the cracks in these area may develop with the increasing waterhead level.
The simulation of system affected by the three influencing factors together is carried out.
Online since: September 2011
Authors: Meng Hou, Jin Zou, Xue Gang Tang, Rowan Truss
Introduction
Filled polymers exhibit a diverse range of rheological properties, varying from simple viscous fluids to highly elastic solids with increasing filler volume fraction, φ [1].
Recently, much interest has focused on the development of polymer nanocomposites based on highly anisotropic inorganic nanoparticles such as layered silicates and MWCNTs due to their potential to remarkably enhance the properties of polymers [2-10].
Generally, polymer nanocomposites exhibit a stronger enhancement in the viscoelastic properties compared with microcomposites at similar filler volume fraction [2].
At low frequency, PVDF chains were fully relaxed and exhibited typical terminal behaviour with the scaling properties [28, 29].
For simplicity, we divide all the effects into two factors: 1) jamming effect from the network structures of the nanofillers. 2) non-jamming effect, which from the slowdown in relaxation of adsorbed chains, polymer-mediated transient network, and strain field distortion etc., and caused by the presence of rigid nanofillers.
Recently, much interest has focused on the development of polymer nanocomposites based on highly anisotropic inorganic nanoparticles such as layered silicates and MWCNTs due to their potential to remarkably enhance the properties of polymers [2-10].
Generally, polymer nanocomposites exhibit a stronger enhancement in the viscoelastic properties compared with microcomposites at similar filler volume fraction [2].
At low frequency, PVDF chains were fully relaxed and exhibited typical terminal behaviour with the scaling properties [28, 29].
For simplicity, we divide all the effects into two factors: 1) jamming effect from the network structures of the nanofillers. 2) non-jamming effect, which from the slowdown in relaxation of adsorbed chains, polymer-mediated transient network, and strain field distortion etc., and caused by the presence of rigid nanofillers.
Online since: October 2014
Authors: Marietta A. Gasparyan, Yuri A. Safaryan
At the same time the spectrum of traditional concepts based on regional factors are crystallized, including climate, landscape, building stone, functional and aesthetic priorities.
However, keep in mind two factors.
But all consolidates point design method, down in the final, combined with appropriate principles of Armenian building art, justified by local climatic, social, residential, structural factors.
High resistance to mechanical impact, its stone of sufficient strength and resistance, small volume weight, good thermal and other building properties are excellent indicators of the quality of the material.
Innovation of the 20th century architecture is the masterly use of the perspective properties of the cylindrical vault and forming a semicircular arch.
However, keep in mind two factors.
But all consolidates point design method, down in the final, combined with appropriate principles of Armenian building art, justified by local climatic, social, residential, structural factors.
High resistance to mechanical impact, its stone of sufficient strength and resistance, small volume weight, good thermal and other building properties are excellent indicators of the quality of the material.
Innovation of the 20th century architecture is the masterly use of the perspective properties of the cylindrical vault and forming a semicircular arch.
Online since: August 2014
Authors: Traian Fleșer, Marius Pop-Calimanu, Radu Cojocaru, Petronela Lucia Ciorpac, Cristian Ciucă
In order to determine the mechanical properties of the AA2124/SiC/25p-T4 composite material after FSW welding, static tensile test was performed.
Fig. 4 XRD patterns of the base material and stirred zone The effect of the process parameters on the mechanical properties of the weld Microhardness measurements.
The mechanical properties of the welded joint are close to the base material.
Balasubramanian, Effect of Heat Input on Mechanical and Metallurgical Properties of Friction Stir Welded AA6061-10% SiCp MMMCs, JMEP, 21 (2012) 2417-2428
Azizieh, Evaluation of microstructure and mechanical properties in friction stir welded A356+15%SiCp cast composite, Mater Lett, 60 (2006) 565–568
Fig. 4 XRD patterns of the base material and stirred zone The effect of the process parameters on the mechanical properties of the weld Microhardness measurements.
The mechanical properties of the welded joint are close to the base material.
Balasubramanian, Effect of Heat Input on Mechanical and Metallurgical Properties of Friction Stir Welded AA6061-10% SiCp MMMCs, JMEP, 21 (2012) 2417-2428
Azizieh, Evaluation of microstructure and mechanical properties in friction stir welded A356+15%SiCp cast composite, Mater Lett, 60 (2006) 565–568
Online since: October 2023
Authors: Cintia Barajas, Patricia Menéndez, Piera Maresca, Cristina Moreno-Díaz
To do this, the
research begins with an analysis of the properties of this product, its production methods, the conditions
and factors that influence its growth, and its possible applications.
By creating a suitable growing medium (see Table 1) for Acetobacter xylinum, BC can be obtained with the following characteristics: 1) high water retention capacity, 2) biodegradable and biocompatible, 3) good mechanical properties, 4) high thermal stability, 5) high degree of crystallinity, 6) non-toxic and non-allergenic.
• Temperature, humidity, and acidity of the medium are key factors to consider for proper growth
Bacterial Cellulose Properties and Its Potential Application.
Factors affecting the yield and properties of bacterial cellulose.
By creating a suitable growing medium (see Table 1) for Acetobacter xylinum, BC can be obtained with the following characteristics: 1) high water retention capacity, 2) biodegradable and biocompatible, 3) good mechanical properties, 4) high thermal stability, 5) high degree of crystallinity, 6) non-toxic and non-allergenic.
• Temperature, humidity, and acidity of the medium are key factors to consider for proper growth
Bacterial Cellulose Properties and Its Potential Application.
Factors affecting the yield and properties of bacterial cellulose.
Online since: October 2011
Authors: Xiao Lei Guo, Ping Xiang Cao, Bao Jin Wang, Zong Ming Qiao, Wei Hu, Hong Wei
In actual production, the precision of thickness control may be affected because thickness gauge are easy to viscous materials and other impurities.
Affect the accuracy of ultrasonic testing are many factors, mainly thickness accuracy, calibration, probe, coupling agents, surface properties of the measured materials and the environment temperature, especially the porous fiber materials, causing a large number of ultrasonic scattering and attenuation, resulting in There was abnormal readings or no readings (usually the abnormal readings are less than the actual thickness.)
Laser system has been widely used in wood-based panels continuous flat press, but the Panel is not only the entire slab surface, high temperature, dust pollution is serious, the test point arrangement is limited, affecting the accuracy of slab thickness measurement.
Measuring head has two upper and lower rollers rotated freely, the upper roller that is able to move up and down is equipped with mechanical micrometer.
Since the sensor is inaccurate, and is vulnerable by the environmental factors such as noise and human factors, the article adopts the fuzzy comprehensive evaluation and chaos optimization neural network method of automatic acquisition of weight, and chooses membership functions and adaptively adjusts the comprehensive evaluation weight, identifies the mutational errors, the long-term errors and rejects small changes errors.
Affect the accuracy of ultrasonic testing are many factors, mainly thickness accuracy, calibration, probe, coupling agents, surface properties of the measured materials and the environment temperature, especially the porous fiber materials, causing a large number of ultrasonic scattering and attenuation, resulting in There was abnormal readings or no readings (usually the abnormal readings are less than the actual thickness.)
Laser system has been widely used in wood-based panels continuous flat press, but the Panel is not only the entire slab surface, high temperature, dust pollution is serious, the test point arrangement is limited, affecting the accuracy of slab thickness measurement.
Measuring head has two upper and lower rollers rotated freely, the upper roller that is able to move up and down is equipped with mechanical micrometer.
Since the sensor is inaccurate, and is vulnerable by the environmental factors such as noise and human factors, the article adopts the fuzzy comprehensive evaluation and chaos optimization neural network method of automatic acquisition of weight, and chooses membership functions and adaptively adjusts the comprehensive evaluation weight, identifies the mutational errors, the long-term errors and rejects small changes errors.
Online since: September 2013
Authors: Guo Xin Xue, Fang Chen, Bo Hong, Xing Guo
This might be due to shape, form and other factors of cellulose.
Parenchymal cell cellulose from sugar beet pulp: preparation and properties.
Preparation and properties of cellulose nanocrystals: Rods, spheres,and network.
Study on rheological properties of nanocrystalline cellulose colloid.
Study on rheological properties of nanocrystalline cellulose suspension.
Parenchymal cell cellulose from sugar beet pulp: preparation and properties.
Preparation and properties of cellulose nanocrystals: Rods, spheres,and network.
Study on rheological properties of nanocrystalline cellulose colloid.
Study on rheological properties of nanocrystalline cellulose suspension.
Online since: September 2013
Authors: Jerzy Pasławski, Mahmoud Hsino
Partial results of studies to determine the influence of various factors on the effects of modifications are presented
Introduction
In a concrete element in a dry and hot climate many processes, that influence each other, occur at the same time.
Over time, as a result of hydration progress, the hardening concrete acquires mechanical properties (its strength increases).
It can be concluded from the above, that a proper thermal care is becoming one of the key factors that determine the obtainment of durable monolithic concrete construction.
Further studies are aimed to determine the impact of significance of factors such as: output temperature of concrete mix, slab thickness, dosage level of PCM, characteristic of daily cycles of curing conditions, etc.
Parhizkar “Internal curing of high strength self consolidating concrete by saturated lightweight aggregate - effects on material properties”.
Over time, as a result of hydration progress, the hardening concrete acquires mechanical properties (its strength increases).
It can be concluded from the above, that a proper thermal care is becoming one of the key factors that determine the obtainment of durable monolithic concrete construction.
Further studies are aimed to determine the impact of significance of factors such as: output temperature of concrete mix, slab thickness, dosage level of PCM, characteristic of daily cycles of curing conditions, etc.
Parhizkar “Internal curing of high strength self consolidating concrete by saturated lightweight aggregate - effects on material properties”.
Online since: May 2020
Authors: Oleg V. Kudryakov, Valery N. Varavka, Igor S. Morozkin
It is shown that the determining factor in the process of wear nucleation under dynamic cyclic loading has a structural factor.
Depending on the structure and properties of the material, as well as on the nature of the loads, the critical fatigue defect develops in the form of cracks, pores or microcraters.
Then the mechanical component of the number of a droplet impacts is expressed as N3 = f (rkr /rm).
For hardened metallic materials, for example, for strongly deformed or hardened alloys (including 20Cr13 with martensitic structure), in expression (1) the first three factors turn into one.
The quantities st and DF are material properties and, in general, they are expressed through its basic physical characteristics m and b: st = m × b / l ; DF = a1× m × b3 . (3) The coefficient a1 in expressions (3) classifies obstacles by their strength [6].
Depending on the structure and properties of the material, as well as on the nature of the loads, the critical fatigue defect develops in the form of cracks, pores or microcraters.
Then the mechanical component of the number of a droplet impacts is expressed as N3 = f (rkr /rm).
For hardened metallic materials, for example, for strongly deformed or hardened alloys (including 20Cr13 with martensitic structure), in expression (1) the first three factors turn into one.
The quantities st and DF are material properties and, in general, they are expressed through its basic physical characteristics m and b: st = m × b / l ; DF = a1× m × b3 . (3) The coefficient a1 in expressions (3) classifies obstacles by their strength [6].