Permittivity and anti-voltage ability commonly determined the energy storage density of material. Although composite could be molded easier than ceramic, its lower energy storage density prevented the material from ap...
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Permittivity and anti-voltage ability commonly determined the energy storage density of material. Although composite could be molded easier than ceramic, its lower energy storage density prevented the material from application since the polymer usually took on poor dielectric constant. In order to enhance the energy storage performance of composite, PAn was introduced to PVDF by emulsion polymerization. SEM of the co-polymers showed that they could construct continuous media till the concentrate of aniline reached 25% while polymerizing. The permittivity of polymer rose along with the concentrate increasing of aniline and pH falling value of retreating solution. The permittivity and anti-voltage strength of composite also charged correspondingly. As a consequence, the energy storage density innovated much higher than ever. The maximum energy storage density could approach 0.9185Johr/cc.
A one-dimensional multi-layer heat conduction model of CRAM is developed based on its memory principle. According to the read/write requirement of memory cell, and to the condition of its thermal compatibility with CM...
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A one-dimensional multi-layer heat conduction model of CRAM is developed based on its memory principle. According to the read/write requirement of memory cell, and to the condition of its thermal compatibility with CMOS circuits, the critical parameters are fixed on. The temperature profiles are portrayed by solving the heat conduction equation with the reasonable boundary conditions. Under the limitation of the critical parameters, we adjust the parameters of cell structure, use heating layer, and then develop the structural model of CRAM memory cell which not only meet the need of read/write function of memory cell but for the first time achieve the thermal compatibility of CRAM memory cell with CMOS circuits.
High-performance quartz sand sintered brick was successfully made by using low-quality desert quartz sand, in order to work out the best technological conditions for making the higher performance-price rate sintered b...
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High-performance quartz sand sintered brick was successfully made by using low-quality desert quartz sand, in order to work out the best technological conditions for making the higher performance-price rate sintered brick, microstructure of sintered brick was studied through adjusting molding method, molding pressure, sintering temperature and sintering time. The result shows that sintered brick exhibits the best microstructure by using cold isostatic compaction at 100MPa and sintering 2h at 1150°C.
Aluminosilicate refractory waste was used to prepare high performance ceramic ball grinding media with 75% Al2O3. The influence of milling time on the particle size of raw materials, the sintering temperature, and per...
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Aluminosilicate refractory waste was used to prepare high performance ceramic ball grinding media with 75% Al2O3. The influence of milling time on the particle size of raw materials, the sintering temperature, and performance of ceramic balls were studied. Results show that with increasing milling time the particle size of the raw materials decreased, resulting in a decrease of ceramic ball sintering temperature and an increase in wear resistance and volume density. The wear rate and volume density of balls prepared by milling the materials for 72 h were 0.01886 %/h and 3.374 g/cm 3, respectively.
A physical model for mobility degradation by interface-roughness scattering and Coulomb scattering is proposed for SiGe p-MOSFET with a high-k dielectric/SiO2 gate stack. Impacts of the two kinds of scatterings on mob...
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A physical model for mobility degradation by interface-roughness scattering and Coulomb scattering is proposed for SiGe p-MOSFET with a high-k dielectric/SiO2 gate stack. Impacts of the two kinds of scatterings on mobility degradation are investigated. Effects of interlayer （SiO2） thickness and permittivities of the high-k dielectric and interlayer on carrier mobility are also discussed. It is shown that a smooth interface between high-k dielectric and interlayer, as well as moderate permittivities of high-k dielectrics, is highly desired to improve carriers mobility while keeping alow equivalent oxide thickness. Simulated results agree reasonably with experimental data.
The mesoporous WO3 film was prepared by the sol-gel-pyrolysis method with the PEG-400 as the structure-directing agent. The crystalline phase, microstructure, special surface area and pore size distribution of the WO3...
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The mesoporous WO3 film was prepared by the sol-gel-pyrolysis method with the PEG-400 as the structure-directing agent. The crystalline phase, microstructure, special surface area and pore size distribution of the WO3 film were tested with the XRD, SEM and N2 sorption techniques, respectively. It is found the WO3 film belongs to the cubic system and its average pore size is 6.37 nm as well as the special surface is 20.69 m2/g. The test results by the electrochemical cyclic voltammetry and UV-Vis spectrum showed that the mesoporous WO3 film has a good electrochromic performance. The film possesses excellent modulation to the visible light and the maximal average transmittance modulation scope reached 69.96%.
Mo/SiO2 composites with different mass compositions were sintered by spark plasma sintering (SPS) technique. The mechanism of sintering and densifications were studied and the relationship between the distribution of ...
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Mo/SiO2 composites with different mass compositions were sintered by spark plasma sintering (SPS) technique. The mechanism of sintering and densifications were studied and the relationship between the distribution of Mo in composites and the electrical property was discussed. The result indicated that there was no reaction between Mo and SiO2;the composites are mechanically mixed instead. Partly softened SiO2 and the particles of Mo filling the hole facilitated the compact of Mo/SiO2 composites. When the mass composition of Mo was less than 35%, the particles of Mo dispersed individually in SiO2 and the composite was an insulator;when that exceeds 40%, the composite was a conductor due to the connection of the particles of Mo.
In this paper the structure of La-doped SBT with different doping amount was tested by XRD and raman scattering. La-doping has not destroyed the structure of SBT. With the increase of doping amount, La ion substitutes...
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In this paper the structure of La-doped SBT with different doping amount was tested by XRD and raman scattering. La-doping has not destroyed the structure of SBT. With the increase of doping amount, La ion substitutes into different site and the 314 and 550 cm-1 modes related to the rotating and tilting of TiO6 octahedron firstly become wide and then become sharp. La substituting into the Bi site in perovskite-like has more influence on the vibrating of TiO6 octahedron.
Ti2AlC bulk material was synthesized by hot pressing using elemental powder mixture of Ti, Al and active carbon. X-ray diffraction (XRD) in different temperature of hot pressing was used to determine the phase composi...
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Ti2AlC bulk material was synthesized by hot pressing using elemental powder mixture of Ti, Al and active carbon. X-ray diffraction (XRD) in different temperature of hot pressing was used to determine the phase composition and scanning electron microscope (SEM) was observed to investigate the microstructure of samples synthesized respectively. Results show that high purity Ti2AlC bulk material was synthesized by hot pressing elemental powder mixture of 2.0 Ti/1.0 Al/1.0 C at 1500 °C for 60 minutes, in which little TiC and Ti3AlC2 existed as secondary phases. According to the results of thermodynamics calculation, for Ti, Al and C system the most stable compound in thermodynamics was TiC. Moreover, the formation of Ti3AlC2 during the synthesizing progress of Ti2AlC was explained.
In this paper, the lower and upper bounds of Young's modulus and Poisson ratio are determined by the effective stress method and effective strain method from material mechanics. The effective heat flux method base...
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In this paper, the lower and upper bounds of Young's modulus and Poisson ratio are determined by the effective stress method and effective strain method from material mechanics. The effective heat flux method based on the hypothesis of equivalent temperature difference and the effective temperature difference method based on the hypothesis of equivalent heat flux are proposed, the lower and upper bounds of the thermal conductivity of ceramic/metal composite material are determined similarly. The result shows that the property values of ceramic/metal composites calculated from current theoretical property formulas are within the lower and upper bounds determined by the above methods.
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