After these researches , the equations for densification kinetics of jd and ty materials are established . the effect of sintering time on the phase structure and microstructure was also investigated 此外還研究了兩種材料的燒結(jié)收縮行為,并建立了jd材料和ty材料的燒結(jié)動(dòng)力學(xué)方程。