scholarly journals Ink-jet Printing of YBa2Cu3O7 Superconducting Coatings and Patterns from Aqueous Solutions

2012 ◽  
Vol 1449 ◽  
Author(s):  
Isabel Van Driessche ◽  
Jonas Feys ◽  
Pieter Vermeir ◽  
Petra Lommens
Keyword(s):  
Coated Conductors ◽  
Proof Of Concept ◽  
Continuous Processing ◽  
Ink Jet Printing ◽  
On Demand ◽  
Drop On Demand ◽  
Novel Approach ◽  
Ink Jet ◽  
Fluid Properties ◽  
Jet Printing

ABSTRACTIn this paper, we combine the use of Drop-on-Demand (DOD) ink-jet printing with completely water- based inks as a novel approach to the CSD process for coated conductors. This method holds the promise of improved scalability due to lower ink losses, continuous processing and a drastically increased precursor lifetime due to the prevention of solvent evaporation and dust incorporation. Moreover, ink-jet printing has the potential to switch quite easily from continuous coatings to a multi-filamentary pattern, which is particularly important for alternating current (AC) or field applications of coated conductors. The fluid properties, often expressed with dimensionless constants, like the Reynolds and Weber numbers, for printable liquids were determined. For proof-of-concept, single crystals of SrTiO3 with a low mismatch towards YBCO, were used as substrates.

Ink Jet printing of mammalian primary cells for tissue engineering applications

2004 ◽  
Vol 845 ◽  
Author(s):  
Rachel Saunders ◽  
Julie Gough ◽  
Brian Derby
Keyword(s):  
Cell Types ◽  
Human Osteoblast ◽  
Primary Cells ◽  
Drop Velocity ◽  
Primary Human Osteoblast ◽  
On Demand ◽  
Drop On Demand ◽  
Ink Jet ◽  
Jet Printing ◽  
Robust Response

ABSTRACTA piezoelectric drop on demand printer has been used to print primary human osteoblast and bovine chondrocyte cells. After deposition the cells were incubated at 37°C and characterised using optical microscopy, SEM and cell viability assays. Cells showed a robust response to printing exhibiting signs of proliferation and spreading. Increasing the drop velocity results in a reduced cell survival and proliferation rates but both cell types grew to confluence after printing under all conditions studied.

scholarly journals Superconducting HfO2-YBa2Cu3O7−δ Nanocomposite Films Deposited Using Ink-Jet Printing of Colloidal Solutions

Coatings ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 17 ◽  
Author(s):  
Hannes Rijckaert ◽  
Pablo Cayado ◽  
Rainer Nast ◽  
Javier Diez Sierra ◽  
Manuela Erbe ◽  
...  
Keyword(s):  
Nanocomposite Films ◽  
Pinning Force ◽  
Colloidal Solutions ◽  
Ink Jet Printing ◽  
Drop On Demand ◽  
Ink Jet ◽  
Jet Printing ◽  
Printing Parameters ◽  
Critical Current Density Jc ◽  
Pinning Properties

To reduce the fabrication costs while maximizing the superconducting and pinning properties of YBa2Cu3O7−δ (YBCO) nanocomposite films, the drop-on-demand ink-jet printing technique was used to deposit colloidal YBCO inks onto LaAlO3 substrates. These inks containing preformed HfO2 nanocrystals were carefully adjusted, prior to the jettability, as the droplet formation depends on the rheological properties of the inks themselves. After carefully adjusting printing parameters, 450-nm thick pristine YBCO films with a self-field critical current density (Jc) of 2.7 MA cm−² at 77 K and 500-nm thick HfO2-YBCO nanocomposite films with a self-field Jc of 3.1 MA·cm−² at 77 K were achieved. The final HfO2-YBCO nanocomposite films contained dispersed BaHfO3 particles in a YBCO matrix due to the Ba2+ reactivity with the HfO2 nanocrystals. These nanocomposite films presented a more gradual decrease of Jc with the increased magnetic field. These nanocomposite films also showed higher pinning force densities than the pristine films. This pinning enhancement was related to the favorable size and distribution of the BaHfO3 particles in the YBCO matrix.

Direct Ink-Jet Deposition of Ceramic Green Bodies: I - Formulation of Build Materials

1998 ◽  
Vol 542 ◽  
Author(s):  
K. A. M. Seerden ◽  
N. Reis ◽  
B. Derby ◽  
P. S. Grant ◽  
J. W. Halloran ◽  
...  
Keyword(s):  
Rapid Prototyping ◽  
Stearic Acid ◽  
On Demand ◽  
Direct Deposition ◽  
Drop On Demand ◽  
Ink Jet ◽  
Jet Printing ◽  
Printing System ◽  
Ceramic Suspensions ◽  
Materials Used

AbstractA conventional rapid prototyping technology has been used to build prototypes using direct deposition through a drop-on-demand ink-jet printing system. Al2O3 - filled waxes have been developed with viscosity values close to those of the materials used in commercial printing systems. Commercial dispersants based on stearic acid and sterylamine have been studied and stable ceramic suspensions with ceramic volume fractions in the range 20–40 volume% produced with suitable viscosity. A suspension of 20% Al2O3 in an alkane wax has been successfully printed.

scholarly journals Thin YBa2Cu3O7-δ patterns by Chemical Solution Processing using Ink-Jet Printing

2013 ◽  
Vol 1547 ◽  
pp. 3-12 ◽  
Author(s):  
Jonas Feys ◽  
Bram Ghekiere ◽  
Petra Lommens ◽  
Simon C. Hopkins ◽  
Pieter Vermeir ◽  
...  
Keyword(s):  
Metal Ion ◽  
Coated Conductors ◽  
Ion Concentration ◽  
Rheological Parameters ◽  
Attractive Alternative ◽  
Ink Jet Printing ◽  
Deposition Parameters ◽  
Ink Jet ◽  
Jet Printing ◽  
Different Dimensions

ABSTRACTIn this paper, we present ink-jet printing as an attractive alternative to lithography and etching methods for the development of multi-filamentary YBa2Cu3O7-δ coated conductors. Our research is mainly focused on the study of the influence of rheological parameters on the printability of water-based inks in order to produce superconducting patterns on SrTiO3 and CeO2-La2Zr2O7-Ni5at%W substrates. An aqueous YBCO precursor ink with a total metal ion concentration of 1.1 mol/L with a viscosity of 6.79 mPa s and a surface tension of 67.9 mN/m is developed. Its printing behavior using several ink-jet printing devices is verified using a camera with strobed illumination to quantify droplet velocity and volume. After optimization of the deposition parameters, YBCO tracks with different dimensions could be printed on both types of substrates. Their shape and dimensions were determined using optical microscopy and non-contact profilometry, showing 100-200 nm thick and 40-200 µm wide tracks. Finally, resistivity measurements were performed on the widest tracks on SrTiO3 showing a clear drop in the resistivity starting from 88.6 K with a ∆Tc of 1.4 K.

Nano-Sized Ceramic Inks for Drop-on-Demand Ink-Jet Printing in Quadrichromy

2008 ◽  
Vol 8 (4) ◽  
pp. 1979-1988 ◽  
Author(s):  
Davide Gardini ◽  
Michele Dondi ◽  
Anna Luisa Costa ◽  
Francesco Matteucci ◽  
Magda Blosi ◽  
...  
Keyword(s):  
Surface Tension ◽  
Particle Size ◽  
Ceramic Tiles ◽  
Nozzle Clogging ◽  
Ink Jet Printing ◽  
Drop On Demand ◽  
Wide Range ◽  
Ink Jet ◽  
Long Time ◽  
Jet Printing

Nano-sized ceramic inks suitable for ink-jet printing have been developed for the four-colours CMYK (cyan, magenta, yellow, black) process. Nano-inks of different pigment composition (Co1–xO, Au0, Ti1–x–ySbxCryO2, CoFe2O4) have been prepared with various solid loadings and their chemico-physical properties (particle size, viscosity, surface tension, ζ-potential) were tailored for the ink-jet application. The pigment particle size is in the 20–80 nm range. All these nano-suspensions are stable for long time (i.e., several months) due to either electrostatic (high ζ-potential values) or steric stabilization mechanisms. Both nanometric size and high stability avoid problems of nozzle clogging from particles agglomeration and settling. Nano-inks have a Newtonian behaviour with relatively low viscosities at room temperature. More concentrated inks fulfil the viscosity requirement of ink-jet applications (i.e., <35 mPa˙s) for printing temperatures in between 30 and 70 °C. Surface tension constraints for ink-jet printing are fulfilled by nano-inks, being in the 35–45 mN˙m–1 range. The nano-sized inks investigated behave satisfactorily in preliminary printing tests on several unfired industrial ceramic tiles, developing saturated colours in a wide range of firing temperatures (1000–1200 °C).

Freeform Fabrication of Ceramics by Hot-Melt Ink-Jet Printing

2000 ◽  
Vol 625 ◽  
Author(s):  
B. Derby ◽  
N. Reis ◽  
K.A.M. Seerden ◽  
P.S. Grant ◽  
J.R.G. Evans
Keyword(s):  
Melting Point ◽  
Deposition Process ◽  
Layer Growth ◽  
Ink Jet Printing ◽  
Freeform Fabrication ◽  
Ink Jet ◽  
Ceramic Components ◽  
Fluid Properties ◽  
Jet Printing ◽  
Hot Melt

AbstractInk-jet printing is a versatile freeform fabrication technique with a high spatial resolution. By suspending ceramic particles in low melting point organic materials and printing above the melting point, rapid cooling on impact after printing results in rapid layer growth. Current results from a collaborative programme studying the hot wax ink-jet printing of structural ceramic components will be reported. The influence of key fluid properties on the ink-jet deposition process are discussed.

Deposition of Molten Eutectic Solder using Jet Printing Techniques

1995 ◽  
Vol 390 ◽  
Author(s):  
Michael D. Snyder ◽  
Ronald Lasky
Keyword(s):  
Surface Tension ◽  
Circuit Boards ◽  
Eutectic Solder ◽  
On Demand ◽  
Drop On Demand ◽  
Single Feature ◽  
Ink Jet ◽  
Jet Printing ◽  
Printing Techniques ◽  
Large Spherical

ABSTRACTThis paper discusses the use of Ink Jet printing techniques to dispense small (50 to 75 micrometer diameter) particles of molten eutectic solder individually at programmable dispense rates from drop on demand to several thousand per second. Alternative jet dispensing techniques are discussed. The technology could allow the selective application of programmable amounts of solder on precision circuit boards and wafer substrates, while avoiding the high cost and flexibility limits associated with hard tooling. Large solder features can be constructed by dispensing individual droplets and relying on surface tension to draw them together to form a large single feature. Alternatively, columnar features can be created by successively dispensing solder droplets at the same site, allowing time between successive droplets to avoid forming a single large spherical feature.Several potential application areas in industry are discussed along with some of the issues associated with the projected performance of the method in the accuracy and speed domains.

Novel Gelation System For Fabricating 3-D Structures via Ink Jet Printing

2009 ◽  
Vol 1239 ◽  
Author(s):  
Rachel E. Saunders ◽  
Kwan P Liem ◽  
Robert J Mart ◽  
Simon J Webb ◽  
Brian Derby
Keyword(s):  
Layer By Layer ◽  
Delivery Method ◽  
Form Complex ◽  
3 Dimensional ◽  
On Demand ◽  
Drop On Demand ◽  
Ink Jet ◽  
The Matrix ◽  
Jet Printing ◽  
Printing Parameters

AbstractDrop-on-demand inkjet printing is a fabrication technique that is capable of depositing materials layer-by-layer to form complex 3-dimensional (3-D) constructs. Here we present a new single drop delivery method in which both the matrix and cross-linker are present but separated through the use of vesicle packaging. Changing the printing parameters has little effect on the integrity of the calcium(II)-loaded vesicles, with calcium(II) released selectively by warming after printing. Alginate solutions containing calcium(II)-loaded vesicles were successfully printed and the printed layers were shown to gel on demand at 37 °C. The printed alginate layers were evaluated with regards to their potential to provide 3-D structures for cell culture.

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