In this work, a biocompatible polymer was improved with the body of the organism Poly (Methyl Methacrylate) (PMMA) supported by with a three-phase nano bio-ceramic powder (CZT) NPs consisting of a mixture of, oxide zirconium (ZrO2), oxide calcium (CaO) and oxide titanium (TiO2). Samples were acquired using the fluid mixing method and using ultrasound technology to disperse the powder and spread it inside the (PMMA). Nano bio-ceramic powder was added in weight proportions (2%, 4%, 6%, 8%) as a reinforcement to the polymer (PMMA) to preparenanocomposites. X - ray diffraction (XRD) and electron microscopy (SEM) revealed that (CZT) NPs are uniformly distributed in the PMMA matrix. The technique of thermo mechanical analysis (TMA) was used to diagnose thermal properties and thermal expansion at a specific temperature ranging between (20-200)°C. The outcomes showed a noticeable enhancement for the prepared nanocomposites (PMMA / (CZT) NPs) in the thermal expansion coefficient at temperatures ranging between (30-60)°C for the prepared nanocomposites, compared with non-reinforced polymer samples. Keywords: Nano composites, Poly (Methyl Methacrylate) PMMA, Bio-ceramic and Thermal expansion coefficiten.

Poly (Methyl Methacrylate) (PMMA), X - ray Diffraction (XRD), Composite Materials.