Superconductors
Superconductor Technology
Marketech offers a wide range of products for the high temperature superconductor field. These range from basic HTSc raw materials, substrates, powders, targets, as well as finished parts that include currentleads, shields, tubes, and thin films.
Single Crystal Substrates
Our substrates are guaranteed the highest quality and largest sizes available: surface finishes with RMS roughness of 10 - 15 Å and wafering accuracy of 0.5°. The maximum sizes available are: SrTiO3 - 50 mm, LaAlO3 - 3", MgO - 3", and YSZ - 4". Standard sizes are normally in stock and custom sizes are available within two weeks. Non standard and off angle orientation along with side orientations are available. The final cleaning and inspection takes place in a class 1000 clean room.
Strontium Titanate Calcium
Lanthanum Neodymium
Aluminate Yttria Aluminate
Magnesium Oxide Yttria Stabilized
Neodymium Gallate Zirconia
Strontium Zinc Oxide
Lanthanum Gallate Sapphire
Strontium Spinel
Lanthanum GGG
Aluminate
Bi-Crystals
SrTiO3, Sapphire, MgO and YSZ crystals are available in standard 10 x 10 x .5 mm sizes, polished one side and joined at standard angles of 24.0° and 36.8°. Others angles and sizes are available.
Single Crystal Shapes
Highest quality shapes of LaAIO3 and SrTiO3 available for building microwave devices as well as for wafering and polishing. Contact us for sizes and availability.
Strontium
Titanate
Lanthanum
Aluminate
YBCO Single Crystal
Single crystal YBCO is available up to 5 x 5mm
Powders and Targets
We provide uniform, phase pure, low-carbon super-conductor materials. Most of our compounds are available in standard and custom-sized sputtering targets. Our proprietary processing techniques, that produce exact stoichiometric compounds, were developed to satisfy market demands for high quality at a reasonable cost.
Y/Ba/Cu Oxides Ba/Cu Oxides
Bi/Sr/Ca/Cu Oxides La,Sr/Cu Oxides
Bi,Pb,Sr/Cu Oxides Nd/La/Cd Aluminates
Ba/Cu Oxides Nd/Ga Oxides
BSSCO Powder-Bi:2223
This high grade powder is the starting materila for manufacturing a number of bulk HtSC ceramic products, including sputtering targets for HtSC thin films. Applications include materials for tapes and wires, thick film paste and plasma spray powders.
The primary phase of the material is Bi:2223 amd conversion to nearly 100% phase pure 2223 is accomplished during the final heat treatment. The material is available in two grades of crushed agglomerate and as a fine milled powder with bulk densities of 1.4-2.0 g/cm³. The standard stoichiometry is: Bi1.8Pb0.2Sr2Ca2Cu3O10+x
Fullerenes
A range of fullerenes are available for prompt delivery. These include C60/C70 mixtures, carbon 60 with 95% purity and carbon 70 with 98% purity. Higher carbons are available including C76, C78 and C84.
Superconductor Products
Special HtSC Shapes from Bi:2223
A special grade of nearly phase pure 2223 powder that can be formed into wires, discs, rods, tubes, rings, pots, and vessels. By processing according to well developed procedures, our material will offer improved properties, namely density, magnetic flux pinning and critical current. The critical current of this material is up to 108° and can have a critical current of up to 4000 Amps/cm. At 60° and Bex of 1 tesla, the critical current is still about 1000 Amps/cm".
Current Leads
Tubes for Current Leads
HtSc Tubes for Superconducting current leads manufactured from Bi:223 are available in a number of standard and custome sizes with current carrying capabilities of up to 1500 amps. Available in silvered ends for low contact resistance.
HtSC Magnetic Shielding Tubes
Closed and open end tubes for magnetic shielding of SQUIDs and other sensitive devices. Standard sizes have a large inner diameter with the geometric factor of magnetic shield i/d (inner length / diameter) that is higher than 5. Wall thicknesses are approximately 2mm (0.080") and have a shielding factor at 77° of more than 106°. Shielding magnetic flux density (Bsh) at 77° of 10mT typically is obtained, with better values obtainable to meet your exact needs.
Tubes for Current Limiters
These materials can be processed into tubes and other shapes for applications such as HtSC current limiters.
Complete High Temperature Superconducting Current Leads
High temperature superconducting power leads for connecting low temperature magnets can save 66% of the helium boil off or heat leak into the 4.2° K region. Standard unit current ranges from 100 - 5000+ amps, serveral standard units are bundled together. Leads are fabricated to meet your specifications for length and warm and cold end connections.
Thin Film Products
SQUIDS
Our SQUIDS based on YBCO high-Tc superconductors using SrT1O3 substrates and can operate at 77°K. the sensitivity of magnetometers using our SQUIDs are one or two orders of magnitude better than magnetometers using conventional technology.
Thin Films
YBCO and TBCCO thin films on LaAIO3 and sapphire up to 2" diameter. Specific devices are available.
