The document discusses different types of superconducting materials. Type I superconductors include pure metals that become superconducting below a critical temperature and exclude magnetic fields. Type II conductors are metal alloys and ceramic oxides that can carry higher currents in strong magnetic fields. The Meissner effect describes how superconductors repel magnetic fields and become perfect diamagnets. Niobium-titanium is mentioned as a superconductor with a critical temperature of 10K and critical field of 15 Tesla.

1. Superconductivity of Materials Napat, Peerada, Chaloempol

2. Type l superconductors Including thirty pure metals Zero resistivity below a critical temperature Characterized as soft superconductors Has the ability to exclude magnetic field from its interior in superconducting state :The Meissner Effect

3. The Meissner Effect Become perfect diamagnet: repelled by magnetic field

4. Type II Conductor Material: metal alloys, complex oxide ceramic higher critical fields and therefore could carry much higher current densities while remaining in the superconducting state

5. Critical Magnetic field Mixed superconducting (vortex state) Normal state Superconducting state

6. Niobium-Titanium Superconductor a critical temperature of 10 K and a critical magnetic field of 15 Tesla . fine filaments are advantageous because current flows only within a skin - depth of the surface of a superconductor

7. Task Napat: Type I conductor Peerada: Type II conductor Chaloempol: Introduction

8. References http :// hyperphysics . phy - astr . gsu . edu / hbase / solids / scbc . html#c4 http://en.wikipedia.org/wiki/Technological_applications_of_superconductivity http://www.howstuffworks.com/question610.htm http://www.universetoday.com/2008/09/20/helium-leak-forces-lhc-shutdown-for-at-least-two-months/ http :// hyperphysics.phy - astr.gsu.edu / hbase / solids /meis.html#c1 http :// www.physics.ubc.ca /~ outreach/ phys420/p420_96/ bruce / meissner.html http://images.google.co.th/imgres?imgurl=http://www.rise.org.au/info/Tech/scon/image001.jpg&imgrefurl=http://www.rise.org.au/info/Tech/scon/index.html&usg=__O-qgctMchJ-ynhBP4iDsEwu9S70=&h=496&w=650&sz=40&hl=th&start=30&um=1&tbnid=g2cRrjP-4QpBPM:&tbnh=105&tbnw=137&prev=/images%3Fq%3Dtype%2B1%2Bsuperconductors%26ndsp%3D18%26hl%3Dth%26sa%3DN%26start%3D18%26um%3D1