Null, negative and tailored coefficient of thermal expansion materials in oxidic and non- oxidic systems and with electroconductive properties.

CINN researchers have developed a new family of ceramic materials with null and tailored thermal expansion coefficient. The combination of oxidic and non oxidic components as well as the use of certain nanoscale reinforcement phases in aluminosilicate ceramic matrixes with negative thermal expansion coefficient, as well as the synthesis and processing of the aluminosilicates, provide these materials with mechanical, electrical and thermal properties otherwise unobtainable in monolithic materials and glass ceramics with similar thermal expansion coefficients. In addition to this combination of properties, the processes of synthesis and processing by conventional methods of these ceramics are simple and inexpensive enough for obtaining high precision products and services at industrial scale in the areas of precision optics, microelectronics, etc. These materials are particularly suitable for any component requiring high dimensional stability with temperature or a fixed thermal expansion coefficient for its joining with any other element with the same coefficient, thus avoiding a possible mismatch of coefficients expansion.

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