scholarly journals PEMBUATAN PASTA DAN PEMBENTUKAN LAPISAN TIPIS HIDROKSI APATIT KARBONAT

2015 ◽  
Vol 7 (2) ◽  
pp. 161
Author(s):  
Selfa Dewati Samah ◽  
Syukri Arief ◽  
Novesar Jamarun
Keyword(s):  
Thick Film ◽  
Screen Printing ◽  
Crystal Size ◽  
Xrd Analysis ◽  
Hexagonal Crystal ◽  
Screen Printing Method ◽  
Carbonated Hydroxyapatite ◽  
Particle Size Analyzer ◽  
Bet Analysis ◽  
Phosphate Carbonate

 ABSTRACTPaste of Carbonated Hydroxyapatite (CHA) as a biocompatible material that can be used in thebone and teeth repair has been developed on preparation of thick film. CHA paste was preparedby mixing precipitate of CHA with CaSO4 and polyethylene glycol (PEG) in 2-propanol assolvent. Paste was deposited on substrate to get thick films by screen printing method. X raydiffraction (XRD) analysis has shown hexagonal crystal structure and crystal size of CHAacquired 7,2 nm by Scherrer’s method. Fourier Transform Infrared (FTIR) analysis has shownabsorption spectra which indicating phosphate, carbonate, and hydroxide group. Size of thiscomposite particles analyzed by PSA (particle size analyzer) about 3μm and pore size was 0.44-0.49 nm obtained from BET analysis, increased with the addition of CaSO4 (0.44 to 0,49 nm).Rephrase PEG was found as an adhesive and homogenize paste on substrat surface. In addition,CHA paste also potentially can be used as bone cement.Keywords : Paste, thick film, carbonated hydroxyapatite

Fabrication and Sensing Behavior of NASICON Thick Film SO2 Gas Sensor by Screen-Printing Method

2003 ◽  
Vol 439 ◽  
pp. 352-357
Author(s):  
Sang Tae Lee ◽  
Jae Chul Bae ◽  
Hee-Kwon Jun ◽  
Duk-Dong Lee ◽  
Jeung Soo Huh
Keyword(s):  
Thick Film ◽  
Gas Sensor ◽  
Screen Printing ◽  
Screen Printing Method ◽  
Printing Method

Large Strain Actuation of 0.65PMN–0.35PT/Pt Thick-Film Bimorphs

2012 ◽  
Vol 2012 (CICMT) ◽  
pp. 000597-000602
Author(s):  
Hana Uršič ◽  
Janez Holc ◽  
Marina Santo Zarnik ◽  
Marko Hrovat ◽  
Marija Kosec
Keyword(s):  
Thick Film ◽  
Piezoelectric Layer ◽  
Screen Printing ◽  
Large Strain ◽  
Unit Length ◽  
Large Displacement ◽  
Screen Printing Method ◽  
Printing Method

The effect of clamping a piezoelectric layer to a relatively stiff substrate results in smaller displacements in comparison to substrate-free structures. To ensure a sufficient amount of the bending of actuators, it is important to reduce the thickness of the substrate. For this reason an approach to preparing “substrate-free”, large-displacement actuators using the screen-printing method was developed. The “substrate-free” 0.65PMN–0.35PT/Pt actuators were prepared by screen-printing the 0.65PMN–0.35PT and Pt pastes on alumina substrates. After the screen printing and the subsequent firing the 0.65PMN–0.35PT/Pt composites were peeled off from the substrates. The normalized displacement (the displacement per unit length) of 55 μm/cm at 18 V was achieved, which is approximately five times higher than the displacement of related actuators from the literature.

Nanocrystalline Tin Oxide Thick-Film Gas Sensor for H2S Detection

2008 ◽  
Vol 368-372 ◽  
pp. 521-523
Author(s):  
Shu Ping Gong ◽  
Li Hua Huang ◽  
Huan Liu ◽  
Ming Li ◽  
Dong Xiang Zhou
Keyword(s):  
Grain Size ◽  
Thick Film ◽  
Gas Sensor ◽  
Tin Oxide ◽  
Screen Printing ◽  
Screen Printing Method ◽  
Oxide Powders ◽  
Low Concentrations ◽  
Average Grain Size ◽  
Optimal Value

Nanocrystalline thick-film gas sensor was fabricated by screen printing method with CuO-doped tin oxide powder synthesized by hydrothermal method. Average grain size of the CuO-doped tin oxide powders was typically below 10 nanometers and the thick-films had a narrow grain size distribution typically below 50 nanometers. Effect of the amount of CuO on the sensing properties was investigated and the optimal value was found to be 3 wt%. The nanocrystalline CuO-SnO2 thick-film gas sensors were more sensitive to H2S than those based on commercial micro SnO2 powders, which were attractive to the detection of low concentrations of H2S gas at relative low temperatures.

Structural and Electrical Properties of Lead Zirconate Titanate Thick Films Fabricated by Screen-Printing Method

2007 ◽  
Vol 544-545 ◽  
pp. 633-636
Author(s):  
Sung Gap Lee ◽  
Sang Man Park
Keyword(s):  
Electrical Properties ◽  
Thick Film ◽  
Screen Printing ◽  
Thick Films ◽  
Sol Gel ◽  
Precursor Solution ◽  
Screen Printing Method ◽  
Gel Method ◽  
Structural And Electrical Properties ◽  
Printing Method

Ferroelectric Pb(Zr0.6Ti0.4)O3 (PZT(60/40)) powder was prepared by a sol-gel method and PZT thick films were fabricated by the screen-printing method on the alumina substrates. The Pt bottom electrodes were screen-printed on the alumina substrate. The PZT(60/40) thick films were annealed at 1050°C for 10min in PbO atmosphere. Pb(Zr0.4Ti0.6)O3 (PZT(40/60)) precursor solution, which prepared by sol-gel method, was spin-coated on the PZT thick films to obtain a densification. These PZT multilayered thick films were annealed at 650°C for 2 h in PbO atmosphere. The upper electrodes were fabricated by screen printing the Ag paste and then firing at 590°C for 10min. Its structural and electrical properties of the PZT thick films with the treatment of PZT(40/60) precursor solution coating were investigated. The coating and drying procedure was repeated 4 times. And then the PZT(40/60) precursor solution was spin-coated on the multilayered thick films. A concentration of a coating solution was 1.5 mol/L and the number of coating was repeated from 0~15. The porosity of the thick films was decreased with increasing the number of coatings. All PZT multilayered thick films showed the XRD patterns of typical peroveskite polycrystalline structure. The relative dielectric constant of the PZT-15 (15: number of solution coatings) thick film were 370. And the PZT-15 thick film shows the remanent polarization of 23.5 μC/cm2 and coercive field of 18.0 kV/cm, respectively.

Structural and Optoelectronic Properties of Polycrystalline CdS Thick Film Prepared by Screen Printing

2018 ◽  
Vol 10 (5) ◽  
pp. 05018-1-05018-4
Author(s):  
B. Y. Bagul ◽  
◽  
P. S. Sonawane ◽  
A. Z. Shaikh ◽  
Y. N. Rane ◽  
...  
Keyword(s):  
Thick Film ◽  
Screen Printing ◽  
Optoelectronic Properties ◽  
Structural And Optoelectronic Properties

scholarly journals Enhancing Formaldehyde Selectivity of SnO2 Gas Sensors with the ZSM-5 Modified Layers

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 3947
Author(s):  
Wei Wang ◽  
Qinyi Zhang ◽  
Ruonan Lv ◽  
Dong Wu ◽  
Shunping Zhang
Keyword(s):  
Gas Sensors ◽  
Indoor Air ◽  
High Performance ◽  
Screen Printing ◽  
Gas Sensing ◽  
Oxide Semiconductors ◽  
Screen Printing Method ◽  
Gas Sensing Properties ◽  
Zeolite Films ◽  
Insufficient Knowledge

High performance formaldehyde gas sensors are widely needed for indoor air quality monitoring. A modified layer of zeolite on the surface of metal oxide semiconductors results in selectivity improvement to formaldehyde as gas sensors. However, there is insufficient knowledge on how the thickness of the zeolite layer affects the gas sensing properties. In this paper, ZSM-5 zeolite films were coated on the surface of the SnO2 gas sensors by the screen printing method. The thickness of ZSM-5 zeolite films was controlled by adjusting the numbers of screen printing layers. The influence of ZSM-5 film thickness on the performance of ZSM-5/SnO2 gas sensors was studied. The results showed that the ZSM-5/SnO2 gas sensors with a thickness of 19.5 μm greatly improved the selectivity to formaldehyde, and reduced the response to ethanol, acetone and benzene at 350 °C. The mechanism of the selectivity improvement to formaldehyde of the sensors was discussed.

Characterization of a LiCoO2 thick film by screen-printing for a lithium ion micro-battery

2006 ◽  
Vol 159 (2) ◽  
pp. 1416-1421 ◽  
Author(s):  
Moon Soo Park ◽  
Sang Hoon Hyun ◽  
Sang Cheol Nam
Keyword(s):  
Thick Film ◽  
Screen Printing ◽  
Lithium Ion
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