Composite route to "zero" expansion ceramics

D. K. Agrawal, R. Roy

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


The use of diphasic or multiphasic composites, involving one negative α phase to control and lower the thermal expansion of a ceramic for substrate, laser mirror and anti-thermal shock applications, was studied. The two phases thermodynamically stable with each other - one with negative α and the second with positive α were mixed, sintered and characterized for thermal expansion behaviour. The negative-α phase was selected from the [NZP] or [CTP] structural family. Specific systems including NaZr2P3O12, CaZr4P6O24 + Nb2O5, GdPO4, ZrSiO4, Mg3(PO4)2, MgO and ZnO were investigated. Several compositions exhibited a near-zero expansion profile over a wide temperature range.

Original languageEnglish (US)
Pages (from-to)4617-4623
Number of pages7
JournalJournal of Materials Science
Issue number12
StatePublished - Dec 1 1985

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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