hnp.hanyang.ac.krhnp.hanyang.ac.kr/file/symposium/023. KSIEC Silver.pdf · 2015-02-12 · with...
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Transcript of hnp.hanyang.ac.krhnp.hanyang.ac.kr/file/symposium/023. KSIEC Silver.pdf · 2015-02-12 · with...
small size of molecules with relatively low permeation. Recently, "Spacer
technique" was proposed with a bridged alkoxide, which is one of the
structured alkoxides and consists of organic functional groups between
two silicon atoms. In this study, 1,1,3,3-tetraethoxy-1,3- dimethyl disi-
loxane (TEDMDS) was used for purification of dicyclopentadiene
(DCPD) in C5 fractions from petroleum industry. TEDMDS-derived
silica sol was synthesized by hydrolysis and condensation under acetic
acid catalyst system at 60°C for 24 hours. TEDMDS-derived silica
membrane was coated on the modified -alumina support, followed by
firing at 300-450°C in air atmosphere. The pervaporation of mixtures of
DCDP/CP (90wt%/10wt%) was investigated at 50°C.
Keywords: silica membrane, tetraethoxydimethyl disiloxane, pervapo-
ration, dicyclopentadiene (DCPD), C5 fraction
1P-109
, , ,
. ,
.
. ,
, , FT-IR, Powder
Wettability .
Keywords: Al O , ,
1P-110
SiO2/Na2O
core binder ,
(organic biner) , Core
Core , , VOCs .
binder Core
. binder
,
, .
SiO2/Na2O , SiO2/Na2O
. ,
Core
.
Keywords: , , , ,
1P-111
Preparation and characterization of micro-sized cubic magnesium oxide using common ion effect
, , ,
, . MgO
,
.
. MgCO3
, MgO .
MgCO3 ,
MgCO3 MgO . MgCO3 MgO ·
(SEM), X (XRD),
(FT-IR) .
Keywords: MgO, Morphorogy, Common ion effect
1P-112
Characteristics of metal-doped thermochromic BiVO4 prepared with various metal by hydrothermal method
Monoclinic crystalline bismuth vanadate (BiVO4) is a bright yellow
pigment with thermochromic property. In this study, metal doped
BiVO4 powdes was prepared from the mixture of bismuth nitrate
(Bi(NO3)3) solution and ammonium vanadate (NH4VO3) at different
reaction temperature with the dope of Mg and Cu by hydrothermal
method. The samples were characterized by X-ray diffraction (XRD),
scanning electron microscopy (SEM), Fourier transformiInfrared
(FT-IR), UV-Vis spectrophotometer (UV-Vis), differential thermal ana-
lysis (DTA), and color difference meter.
Keywords: Hydrothermal, Thermochromic, BiVO4, Monoclinic
1P-113
Characteristics of thermochromic VO2 prepared from various surfactant by hydrothermal method
Vanadium dioxide(VO2) powder was synthesized from vanadium
oxide(V2O5) and oxalic acid dihydrate by the control of temperature,
time, and surfactant through hydrothermal method. The crystal
structure, and thermochromic property of sample were analyzed by the
means of SEM, XRD, DSC, and PSA. With increasing the amount of
surfactant, the phase transition temperature of VO2 sample was
decreased from about 70°C to 60°C due to the decrease of particle size.
The morphology of sample was changed to star-like shape with the
decrease of particle size by addition of surfactant.
Keywords: Thermochromic, Hydrothermal, VO2, Surfactant
1P-114
Synthesis of Pb precursors for PZT films
Lead zirconate titanate, known as PZT, was discovered in the late
1950s is used as a piezoelectric material. There are many piezoelectric
materials, but in the aspect of permittivity, electromechanical coupling
coefficient, and pyroelectrical response, PZT shows high performance.
PZT thin films are fabricated by sol-gel, MOCVD and so on. Among
these methods, MOCVD seems to be the best process because other
methods have drawbacks in achieving constant ratio, limitation of mass
production, and purity problem. General MOCVD precursors are Phthd2,
Zr(OPr)4, and Ti(OiPr)4, but Pbthd2 has low vapor pressure, and bad
decomposition behavior compared with Ti and Zr precursors. There-
fore we synthesized Pb2+ and Pb4+ precursors. In case of Pb2+, precursor
which used aminoalcohol ligand showed good vapor pressure, so we
modified aminoalcohol ligand to synthesis better precursor in viewpoint
of volatility. Next in Pb4+, precursors were synthesized by coordinating
ligands with two phenyl ligands as stabilizer. Pb precursors were defined
by IR, NMR, TGA, X-ray crystallography, and thermal decomposition
and spin coating with sol-gel mixed with Ti, Zr precursors verified PZT.
Keywords: PZT, Pb, MOCVD, precursor, synthesis
1P-115
, ,
.
, ,
.
(calcination)
.
.
.
,
.
,
.
Keywords: hollow, silica, PTMS, ,
1P-116
. , , , ,
, .
, ,
, , , ,
.
. ,
.
SEM .
,
.
.
Flexible Display .
Keywords: , ,
1P-117ZnS(O.OH)
ZnS(O.OH) ,
, CIGS
ZnS(O.OH)
CFR-Spray
. X-ray
Diffraction(XRD), Scanning electron microscope, UV-visvibel spectro-
photometry
, Zn, O S
ZnS(O.OH) .
Keywords: ZnS(O.OH), CFR , annealing temperature
1P-118A Study on the CIGS thin film formation in CFM process
Thin film solar cells have been received the great attention for the
second generation of photovoltaic cells because they have advantages
including low processing cost, lighter weight, flexibility, and possible
roll-to-roll process in comparison to the crystalline silicon-based solar
cells. Cu(In,Ga)Se2 (CIGS) thin film is one of the most promising candi-
dates in the family of copper chalcopyrite materials for the photovoltaic
application. Up to now, several methods such as sputtering, co-evapo-
ration, electro-deposition, and spray pyrolysis have been reported for
the formation of polycrystalline thin films of CIGS. In this study, the
thin films of CIGS were prepared by CFM method. To investigate the
annealing temperature effects, annealing temperature was varied from
200°C to 400°C.
Keywords: CIGS thin film, CFM method, XRD, UV-vis absorption
spectrum
1P-119
- , ,
. ,
, ,
. , ,
. ,
,
, , .
, ,
.
Keywords: ,
1P-120
Hydrosilylation of cyclic alkenes with trichlorosilane
Hydrosilylation Si-C
. cyclic alkene HSiCl3 (Pd, Pt)
hydrosilylation thermal reaction . Pd
5 cyclopentadiene 30 reflux 84%
, Pt cyclohexene 7 reflux
88% , thermal cyclic alkene 6
250°C, 450 psi 98% . Thermal
.
HSiCl3 hydrosilylation
.
Keywords: silane, organosilane, hydrosilylation
1P-121
.
. ,
Synthesis of Silver Nanoparticles for Use of Conductive Pattern Mi Hwa Seo, Sang Man Koo*
Dept. of Chemical Engineering, Hanyang University, Seoul, 133-791, Korea
Introduction - Silver nanoparticles have been investigated as electrode or conductive materials in various electronic applications because of their high conductivity (6.3 X 107 Ω-1m-1)
and stability against oxidation. Recently, The use of silver nanoparticles in conductive pattern printing technology has been known for years. - Silver pastes for various patterning methods, such as silk screen and ink-jet printing, were developed for radio frequency identification
(RFID), microelectromechanical systems (MEMS), electrodes in plasma display (PDP), embedded capacitors, and source/drain electrodes for polymer thin film transistors.
- In this research, we prepared silver paste using various organic ligands, such as neodecanoic acid, and hexylamine. And the silver paste is made of a conductive pattern by screen printing. The conductive pattern sintered at a low temperature(80) to a high temperature(220).
Synthesis of silver nanoparticles
Toluene
Silver salt Hexylamine
Stirred at RT Stirred at 60oC
Phenylhydrazine
Stirred for 10min
Ag-HA1,2 particles
2. Silver hexylamine (Ag-HA1, 2) particles
1. Silver neodecanoate (Ag-ND) particle
Conclusion
Results and discussion
3. TEM, TGA of silver nanoparticles Ag-ND (5nm) Ag-HA1(10nm) Ag-HA2(70nm)
100 200 300 400 500
90
92
94
96
98
100
Temperature(oC)
Wei
ght(%
)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Hea
t Flo
w(W
/g)
100 200 300 400 50094
96
98
100
Temperature(oC)
Wei
ght(%
)
1.0
1.5
2.0
2.5
Hea
t Flo
w(W
/g)
100 200 300 400 50098.5
99.0
99.5
100.0
Temperature(oC)
Wei
ght(%
)
0.0
0.5
1.0
1.5
Hea
t Flo
w(W
/g)
- The surface resistance value becomes large if it contains a lot of stabilizer. In addition, the more the amount of the dispersing solvent is the sheet resistance value becomes large. TGA, DSC, and DTA measurement results show that the dispersion solvent is evaporated and stablilzer in a temperature more than 180.
- In addition, Ag-ND particles was found that the melting temperature(287). Hexylamine melted particles made from more than 250. In the SEM image, the particles necking begins at 140.
- In line resistance is compared to the silver bulk(1.59 μΩ/cm), Ag-HA1 particle higher 2.2 times, Ag-ND particle can be seen that a 3.5 times higher. Line resistance is relatively high at low temperatures
♦ TGA and DSC graph of conductive silver patterns ♦ SEM image of sintered silver patterns
♦ Sheet resistance(Ω/cm2) and resistivity(μΩ/cm)
D.I. water
NaOH
Sodium neodecanoate
D.I. water
Neodecanoic acid
+
D.I. w
ater
Silver nitrate
Stirredfor 10minat RT
Toluene
1wt% Silver neodecanoate
Phenylhydrazine
Stirred for 1h at RT
Ag -ND particle
DTA
100oC
220oC
180oC
140oC
DSC
100 200 300 400 500
Temperature(oC)
DTA
Temperature(oC)
220oC
180oC
140oC
100oC
DSC
100 200 300 400 500
DTA
220oC
180oC
140oC
100oC DSC
100 200 300 400 500Temperature(oC)
- Silver melting - Evaporation of terpineol, stabilizer
Ag-ND Ag-HA1 Ag-HA2
Ag-ND
100 140 180 220
200nm
Neck were formed
Ag-HA1
Neck were formed
Increasing neck area
Ag-HA2
Neck were formed
200nm 200nm 200nm
200nm 200nm 200nm 200nm
200nm 200nm 200nm 200nm
80 100 120 140 160 180 200 220
10-1
100
101102103104105106 Ag-ND Ag-HA1 Ag-HA2a Ag-HA2b
Shee
t res
ista
nce(
Ohm
/Sq)
Temperature(oC)
0 100 200 300 400 500
85
90
95
100
220oC 180oC 140oC 100oC
Wei
ght(%
)
Temperature(oC)
84.7%
96.6%97.8%98.9%
0 100 200 300 400 50095
96
97
98
99
100
220oC 180oC 140oC 100oC
95.4%
97.8%98.6%98.7%
Wei
ght(%
)
Temperature(oC)0 100 200 300 400 500
96
97
98
99
10099.5%
98.5%
96.0%
Wei
ght(%
)
Temperature(oC)
220oC 180oC 140oC 100oC
97.2%
Thickness (μm) 100 140 180 220
Ag-ND 2.5 2.2 1.3 1 Ag-HA1 1.3 1 0.8 0.7 Ag-HA2 3 1.8 1.3 0.9
♦ Thickness of conductive silver patterns
- Ag-HA2a was a washing using twice the amount of a solvent. So the amount of the stabilizer is small, the sheet resistance value is small. The amount of stabilizer increases the sheet resistance value a lot more.
100 120 140 160 180 200 220100101102103104105106107108109
Temperature(oC)
Resistivity(μΩ/cm)
AgND AgHA1 AgHA2 AgPVP
Silver paste
Terpineol
Solvent
Conductive silver pattern
Silver paste coated PET film
Screen printing Sintering Three roll mill
Silver particles
♦ Preparation of conductive silver patterns
