Titanium nitride: Difference between revisions

 

TiN will oxidize at 800&nbsp;°C in a normal atmosphere. TiN has a brown color, and appears gold when applied as a coating. It is chemically stable at 20&nbsp;°C, according to laboratory tests, but can be slowly attacked by concentrated acid solutions with rising temperatures.<ref name=prop/>

 

TiN becomes [[superconductivity|superconducting]] at cryogenic temperatures, with critical temperature up to 6.0&nbsp;K for single crystals.<ref>{{cite journal |last1=Spengler|first1=W. |year=1978 |title=Raman scattering, superconductivity, and phonon density of states of stoichiometric and nonstoichiometric TiN |journal=Phys. Rev. B |volume=17 |issue=3 |pages=1095–1101 |doi=10.1103/PhysRevB.17.1095 |display-authors=etal|bibcode=1978PhRvB..17.1095S }}</ref> Superconductivity in thin-film TiN has been studied extensively, with the superconducting properties strongly varying depending on sample preparation, up to complete suppression of superconductivity at a [[Superconductor Insulator Transition|superconductor-insulator transition]].<ref>{{cite journal |last1=Baturina |first1=T.I. |year=2007 |title=Localized Superconductivity in the Quantum-Critical Region of the Disorder-Driven Superconductor-Insulator Transition in TiN Thin Films |journal=Phys. Rev. Lett. |volume=99 |issue=25 |pages=257003 |doi=10.1103/PhysRevLett.99.257003 |pmid=18233550 |display-authors=etal |arxiv=0705.1602 |bibcode=2007PhRvL..99y7003B |s2cid=518088 }}</ref> A thin film of TiN was chilled to near [[absolute zero]], converting it into the first known [[superinsulator]], with resistance suddenly increasing by a factor of 100,000.<ref>{{cite news |url=http://www.physorg.com/news126797387.html |title=Newly discovered 'superinsulators' promise to transform materials research, electronics design |work=PhysOrg.com |date=2008-04-07}}</ref>