Composite route to "zero" expansion ceramics

D. K. Agrawal; R. Roy

doi:10.1007/BF00559352

Composite route to "zero" expansion ceramics

D. K. Agrawal, R. Roy

Materials Research Institute (MRI)

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	4617-4623
Number of pages	7
Journal	Journal of Materials Science
Volume	20
Issue number	12
DOIs	https://doi.org/10.1007/BF00559352
State	Published - Dec 1 1985

All Science Journal Classification (ASJC) codes

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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title = "Composite route to {"}zero{"} expansion ceramics",

abstract = "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.",

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AB - 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.

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Composite route to "zero" expansion ceramics

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