Abstract: A novel method to examine the defect of aerial complex material is presented in this
paper. The novel speckle averaging technique for DSPI static measurement is proposed to improve
the quality of measurement. A speckle averaging mechanism is designed and fabricated. The
measurement result of sandwich structure material of practical aviation engineering is presented.
The defect in the final results is clear.
Abstract: Vacuum plasma sprayed (VPS) hydroxyapatite (HA) coatings with silver-loaded
zirconium phosphate antimicrobial have been prepared on titanium substrate. Antibacterial effects
of the coatings were studied by bacteria culturing using Porphyromonas gingivalis (Pg),
Fusobacterium nucleatum (Fn) and Actinobacillus actinomycetemcomitans (Aa) as microorganisms.
Simulated body fluid (SBF) test was carried out to evaluate the bioactivity of the coatings as well.
The results obtained showed that the coatings exhibited a marked antibacterial effect against Pg, Fn
and Aa when the content of antimicrobial was equal to or more than 5%. The antibacterial
capability of the coatings decreased in the following order: Pg, Fn, Aa. Bone-like apatite layer was
formed on the silver-containing HA coatings after immersed in SBF, suggesting that their
bioactivities were not affected obviously by the addition of silver-zirconium phosphate
antimicrobial. This study indicated that silver-containing VPS HA coating is a prospective candidate
as dental material.
Abstract: The alignment precision of the electron lenses is one of the most critical factors that
determine overall performance of the microcolumn system including the image resolution and
aberration. Since the lens apertures are usually as small as 5 ~ 300 μm, the alignment is difficult to
carry out, even if the expensive and complicated aligner is used. In this work, we have developed a
novel alignment method using laser diffraction pattern, with which we can easily obtain
high-precision alignment. The images of Cu grid (mesh# 1000) and carbon nanotubes (200-nm
diameter) taken by the microcolumn fabricated by the new alignment scheme has confirmed that the
new method was very simple and useful.
Abstract: The W coatings were prepared by applying the vacuum plasma spraying process (VPS). The phase
composition, microstructure and laser irradiation property were characterized by XRD, SEM and laser.
Results showed that no tungsten oxide appears in the coatings whose phase composition is similar to the
original powder. A better melting state of the coating can be obtained by using the finer powder. The
deposition efficiency of the coating is higher in the cases of a higher H2 flow. There is a pitch whose size is
about 100μm when the substrate was irradiated by laser. However, there is clearly no change for the W
coating surface which was also irradiated under the same condition. It indicates that the laser irradiation
resistance is improved significantly for stainless steel after being deposited with W coating.
Abstract: A new technique preparing polyester fiber impregnated with organic phase change
material(PCM) was proposed and experimentally examined. The impregnation apparatus consisted of
a high pressure pump, two consecutive high pressure cylinders and auxiliary facilities. Polyester fiber
was bound on cylindrical stainless steel net inside equilibrium cylinder and was impregnated with
supercritical solution of PCM. PCMs, paraffin waxes and organic acids, were successfully
impregnated into the polyester fiber even at temperature below it’s glass transition temperature(Tg),
and the impregnated fibers showed high energy storage and release capacity around the melting point
of respective PCMs.
Abstract: The surface of Li(Ni1/3Co1/3Mn1/3)O2 was modified with Al2O3 using aqueous alumina sol
and the electrochemical properties of the coated oxide were measured and compared with both
uncoated and Al-doped one. The alumina coated powder showed 185 mAh/g at first cycle, and 139
mAh/g after 50 cycles in the voltage range of 3.0~4.6 V at 1C rate. The initial discharge capacity of
the coated powder was slightly lower than that of the alumina doped one, but the cycle stability of the
coated was better than that of the doped.
Abstract: Preparation of Ag-Pd nanoparticles by the reduction of AgNO3 and PdCl2 with
hydrazine in Igepal CO-520/cyclohexane reverse micelle solutions was studied. An analysis
by transmission electron microscope and electron diffraction spectrum revealed that the
resultant particles are silver-palladium. The average size of the synthesized nanoparticles
slightly changed with increases in the molar ratio of water to Igepal CO 520. The average size
of the synthesized nanoparticles was below 5 and they were broadly distributed.
Abstract: CoFe2O4 nanoparticles were prepared in ethylene glycol solution under mild
temperature and pressure conditions by precipitation from metal nitrates. The average
size of the synthesized CoFe2O4 nanoparticles was in the range of 5 to 10, and they
were narrowly distributed in the crystalline phase. Their magnetic property was of
superparamagnetic character at room temperature. The effect of synthesis parameters is
discussed such as the pH of starting solutions and reaction temperature.
Abstract: Nano sized ferrites, Sr1-xLaxFe12-yCoyO19 with improved magnetic properties have been
successfully synthesized by a simple sol-gel method forming Fe2O3 and Co2O3 gel using propylene
oxide as a gelation agent, followed by the addition of Sr2+ and La2+ ions. The magnetic behavior of
Sr1-xLaxFe12-yCoyO19 powders annealed at and below 900°C showed that an increase of the
annealing temperature resulted in the enhancement of the coercivity and the decrease of the
saturation magnetization. Especially the highest values of the coercivity and the saturation
magnetization of the ferrites with heat treatment were observed at temperature 150°C lower than
those of the previously reported values. The highest observed values of the coercivity and the
saturation magnetization of Sr0.6La0.4Fe11.8Co0.2O19 were 7,431 Oe and 52.3 emu/g at 900°C. The
ferrite powders annealed at 700°C have a crystalline structure of M-ferrite and showed spherical
particles shapes. The resulting spheres which were formed by the aggregation of nanoparticles with
size 3~5 nm have diameter around 50 nm.