Dicalcium silicate (Ca2SiO4) is an important material in the calcium–silica system, which is frequently identified as an important constituent in Portland cement,13 and 14 refractory materials15 and corrosion-resistance coating materials.16 and 17 And it has also been well studied because of its polymorphism.18 Recently, Ca2SiO4 ceramics have been investigated as a new type of bioceramic for hard tissue regeneration.19 Some studies20 have demonstrated that Ca2SiO4 powders, ceramics and coatings are bioactive and can quickly induce the formation of a bone-like apatite layer on their surface after soaking in a simulated body fluid (SBF). However, poor sinterability and the residual pores in Ca2SiO4 ceramics deteriorate the mechanical properties.