Since the crystallization behavior of samples was greatly influenced by the firing temperature, it was necessary to clarify
the formation of various crystalline phases created in separative-phase fancy glazes at the different firing temperatures, which could influence the physical properties of glazes. Fig. 3 shows the XRD patterns of the glazes fired at 1160 C, 1220 C and 1280 C, respectively. The characteristic amorphous hump could be seen with in the 2θ=15–35 range in all samples, which were associated to a large amount of aluminosilicate glass [16]. Meanwhile, some weak peaks, corresponding to whitlockite (Ca3(PO4)2, PDF09-0169), quartz (SiO2, PDF47-1144) and loveringite (CaTi21O38, PDF42-1368) crystallization, were observed when the firing temperatures were 1160 C and 1220 C.