Abstract Silicate bioceramics have attracted too much attention as a new family of biomaterials in hard tissue regeneration applications. Investigation have shown that novel bioceramics sush as merwinite and wollastonite perform better than Hydroxyapatite in repairing bone tissue and possess better mechanical and bioactivity properties In this study , merwinte and wallestonite based on Cao , Mgo , Sio2 that have recently been known as bioactive bioceramics , were syntherized via a sol-gel approache and calcined in varions temperatures. Phase analysis were investigated and characterized using XRD , SEM. The results of xrd confirm the formation of pure merwinite and wollastonite with grain size of aboute 16,72 nm respectively. Regaeding all the obtained results , it can be noticed that merwinite and wollastonite bioceramics having Ca , Mg , and Si can be used az new and promising biomaterials in bone tissue repairing applications. Thse bioceramics have a wide range of aplications in the filds of tissue engineering and repairing diseased tissues due to their unique properties like bio compatibility , bio degradability non toxicity and their stability in body`s physiological environment

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