Rare-Earth Halides as Fluxes for the Synthesis of Tantalum and Niobium Carbide

Julia Y. Chan, Susan M. Kauzlarich

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

While investigating the reported superconducting phase of Lu2Cl2C2-x, we discovered a novel synthetic route for making TaC and NbC. TaC and NbC are superconducting refractory carbides with a Tc of 10 and 12 K, respectively. TaC or NbC was initially found as impurity in reactions designed to produce Lu2Cl2C2-x. TaC and NbC can be prepared as single crystals by reacting Ta or Nb and C in a LnCl3 (Ln = Y, Lu) flux at as low of a temperature as 850 °C for 4 days. The products are characterized by powder X-ray diffraction and magnetic susceptibility. The various conditions for the preparation of the refractory carbides in rare-earth fluxes and their properties will be presented and discussed.

Original languageEnglish (US)
Pages (from-to)531-534
Number of pages4
JournalChemistry of Materials
Volume9
Issue number2
StatePublished - Feb 1997

ASJC Scopus subject areas

  • Materials Science(all)
  • Materials Chemistry

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