Advanced Materials Research Vol. 773

Abstract: P-doped SiO₂ were prepared by PECVD and one metal shadow mask self-assembled method was used for fabricating oxide thin film transistors gated by such proton conductors. Proton conduction of these films was demonstrated and electrical characteristics of oxide thin film transistors gated by such proton conductors were discussed. Due to excellent proton conduction and big capacitance density, oxide thin film transistors gated by such proton conductors have obtained excellent performances with mobility of 48.39 cm²/Vs, threshold voltage of-0.36 V, subthreshold swing of 0.13 V/decade, I_on/off ratio of 3.2×10⁶ with the relative humidity of 30% at the room temperature.

Abstract: Thin film transistors with nanoparticles silicon floating-gate are fabricated by plasma enhanced chemical vapor deposition. It should be noted that SiO₂ acts as both a tunneling and a blocking layer. Meanwhile, some np-Si dots are embedded within SiO₂ layers. The electrical characteristic of the devices are measured by semiconductor parameter analyzer at room temperature. These Thin film transistors show a good device performance with a high charge-carrier mobility of 33 cm²/vs and a large on/off ratio of 1.2×10⁶. Moreover, the capability of written and erasing was demonstrated. This indicates that thin film transistors can be operated as rewritable nonvolatile floating gate memory devices.

Abstract: In this paper, the blends of natural rubber with waste ground rubber powders have been prepared by mechano-chemical activation method. The influences of particle sizes on both processing performances and mechanical properties have been investigated. The results indicated that: the blends with waste ground rubber powders of smaller particle sizes approached to higher surface tensile and easily mechano-chemical activation, which led to the formation of complete homogenous re-vulcanization cross-linking structure and resulted in the improvements of the whole performances of the final products. The tensile strength, the elongation at break and tear strength approached to the highest value of 20.7MPa, 530% and 33.0 kN/m as the 100mesh waste ground rubber powders were used as the starting materials.

Abstract: We report the application of one-shadow-mask self-assembled method for fabricating low-voltage transparent oxide-based thin film transistors (TFTs) gated by atomic-layer-deposited Al₂O₃ with in-plane-gate configuration. These in-plane-gate TFTs exhibit a good device performance with a small subthreshold swing (300 mV/decade), a large on/off ratio (10⁶), and a low operation voltage (5V). The leakage current for in-plane-gate TFT is actually significantly lower, compared with TFT with bottom-gate configuration. This work has provided a good route for fabricating low-power transparent electronics using simple processing method.

Abstract: In this paper, we use the multiple regression analysis to study the formula of the ordinary ceramics for daily use, and discuss lowering the sintering temperature in the ceramic production process, appropriate to reduce the amount of flux material, thereby reducing the barren material to ensure good formability of the ceramic products.

Abstract: TiO₂ nanotube arrays were fabricated through anodization in the glycol electrolyte system. The new composite structures of the bottom nanotube and the upper nanowire with a length of 15 um to 20 um were prepared. The influence of the water contents in the electrolyte with respect to the composite structure was studied through two-step anodization. The results show that the composite structure can be obtained based on the moderate etching rate of the electrolyte and the selective etching of the nanotube when the glycol system electrolyte contains 0.4wt% NH₄F and 2 vol% H₂O.

Abstract: Use concrete specimens with different mix proportions to conserve them for 90d taking into account the influence of mineral admixture material---fly ash. Then adopts the RCM test method to measure the rapid diffusivity of chloride ion of concrete and observes the microstructure of the cement paste using the SEM (scanning electron microscopy), aiming to study the impact of fly ash on its hydration process. The results show that the micro-pore structure of the concrete has a great influence on the rapid diffusivity of chloride ion, while its diffusivity is closely related with the water-cement ratio of concrete; after the fly ash is added, the ettringite generation of the concrete in the early stage decreases, and the interspace of the transition zone between the hydrated particles and hydration slurry is enlarged, coupled with the increase in the intercommunicating pore; after curing for 90d, the chloride ion diffusivity decreases significantly with the increase in the dosage of fly ash. For the concrete with the fly ash dosage of 15%, its chloride ion diffusivity is only 75.4% of that with the same water-cement ratio; when its fly ash content is 30%, its chloride ion diffusivity is only 32.3% of the ordinary concrete.

Abstract: This paper presents the results of the fracture properties and microstructure of recycled aggregate concrete (RAC) compared with those of natural aggregate concrete (NAC). Concrete specimens were fabricated and tested with the recycled coarse aggregate (RCA) replacing of 0%, 40%, 70% and 100%, respectively. The three-point bending beam method was used to measure the fracture properties of the concrete. SEM and X-CT were used to investigate the microstructure of the concrete. The RCA addition in the concrete caused a decrease in the fracture properties and loose microstructure.

Abstract: In this paper, the rubber blends of natural rubber (NR) with waste ground rubber powders (WGRPs) have been successfully prepared by mechano-chemical activation method and influences of the amounts of WGRPs on the mechanical properties of have been systematically investigated. The results indicated that the mechano-chemical treatment helped for releasing the active agents of WGRPs and formatting homogenous the cross-linked structures of final products. The tensile strengths linearly decreased from 28.6MPa to 12.6MPa while the tear strengths exponentially decreased from 72.8kN/m to 19.4kN/m as the function of the adding amounts of WGRPs.

Abstract: A multifunctional corrosion inhibitor was prepared from polyaspartic acid (PASP), sodium gluconate,zinc sulfate,hydroxyphosphonoacetic acid (HPAA) and benzotriazole (BTA). The performance of corrosion inhibition was evaluated by rotary hanging-piece corrosion tests and steady polarization. The result showed that the corrosion inhibitor was an anodic inhibitor and had good corrosion inhibition performance both on A3 carbon steel and H62 copper in seawater. The corrosion inhibition rate of A3 carbon steel was 93.15% and the corrosion inhibition rate of H62 copper was 93.55% when the concentration of corrosion inhibitor was 150 mgL^-1 in seawater at 40°C.