Wollastonite or CaSiO3 has been the focus of study
because it has been used in ceramics as a sanitary ware
and also table ware. More recently, wollastonite has
been used in electrical applications as a high voltage
insulator [1]. Nowadays, researchers have worked to
improve the properties of wollastonite as a material for
bioceramics and biomaterials such as artificial bond [2],
antibacterial growth [3], and as a platform for the
regeneration of hard tissue [4]. The conventional synthesis
of wollatonite done through a solid-state reaction since
this is a simple method to produce this material for
industrial applications especially ceramics. However, long
reaction times and calcination at high temperatures are
required for this method and the resulting wollastonite
products tend to have large grain sizes [5]. The
microwave synthesis of wallastonite has also been
reported although high purity starting materials are
required to prepare nano size samples of wollastonite
[6]. The hydrothermal method can use low temperatures
with high pressure and can yield high purity nano sized
wollastonite [7]. Intermediate phases can be limited to
reduced the duration of the synthesis experiment [8].
The conventional starting materials used to synthesize
crystalline wollastonite are calcium oxide and silica.
The normal sources of calcium oxide are Ca(NO3)2