Synthesis, sintering and thermal expansion of Ca1-xSrxZr4P6O24 - an ultra-low thermal expansion ceramic system

Santosh Y. Limaye, Dinesh Kumar Agrawal, Rustum Roy, Y. Mehrotra

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Ca1-xSrxZr4P6O24 (O ≤ × ≤ 1.0) system which belongs to a new large family of low thermal expansion materials known as NZP or CTP, was synthesized by the solid state and the sol-gel methods. The conventional sol-gel method was modified by introducing a seeding step which resulted in significant improvement in the sintering characteristics and the microstructure of the sintered material. Sintering data were compared with those obtained by the powder mixing technique. Thermal expansion of the sintered samples was measured by classical dilatometry and by high-temperature X-ray diffractometry. It was found that CaZr4P6O24 (x= 0) and SrZr4P6O24 (x= 1) phases had opposite anisotropies in their respective axial thermal expansions. This behaviour led to the development of a crystalline solution composition of nearly zero expansion characteristic. Microstructures of the sintered specimens were examined by scanning electron microscopy.

Original languageEnglish (US)
Pages (from-to)93-98
Number of pages6
JournalJournal of Materials Science
Volume26
Issue number1
DOIs
StatePublished - Jan 1 1991

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Thermal expansion
Sintering
Sol-gel process
Cytidine Triphosphate
Microstructure
Powders
X ray diffraction analysis
Anisotropy
Crystalline materials
Scanning electron microscopy
Chemical analysis
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Limaye, Santosh Y. ; Agrawal, Dinesh Kumar ; Roy, Rustum ; Mehrotra, Y. / Synthesis, sintering and thermal expansion of Ca1-xSrxZr4P6O24 - an ultra-low thermal expansion ceramic system. In: Journal of Materials Science. 1991 ; Vol. 26, No. 1. pp. 93-98.
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Synthesis, sintering and thermal expansion of Ca1-xSrxZr4P6O24 - an ultra-low thermal expansion ceramic system. / Limaye, Santosh Y.; Agrawal, Dinesh Kumar; Roy, Rustum; Mehrotra, Y.

In: Journal of Materials Science, Vol. 26, No. 1, 01.01.1991, p. 93-98.

Research output: Contribution to journalArticle

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