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作者测定了由全单斜(m)相组成的氧化锆,ZrO_2-MgO在1500-1550℃合成的(M-PSZ)及在1700～1750℃烧成的全立方(C)氧化锆试样,在室温至1190℃的相变化;铁钾催化剂中催化相的生成温度;硅锌矿釉熔体中硅锌矿的结晶速度。结果表明;氧化锆在加热和冷却过程中的相变化为:m-ZrO_2(ss)t(四方相)—ZrO_2(ss)。 M-PSZ和立方氧化锆试样被加热到1000℃左右,C-ZrO_2(ss)开始转化为m-ZrO_2(ss),并脱溶出MgO,在1100～1190℃m-ZrO_2(ss)又转化为t-ZrO_2;冷却到850～400℃再由t-ZrO_2(ss)变成m-ZrO_2(ss),最后,在常温下的相组成90％以上是m-ZrO_2(ss),少量的(C+t)-ZrO_2(ss)和脱溶出来的MgO。铁钾催化剂中的催化相(KFeO_2)在250℃开始生成,650℃结晶完整,到950℃仍然不变,但冷却到室温并放置一夜后,KFeO_2相全部消失。为研究硅锌矿的结晶动力学,根据在等温下衍射强度与时间关系的变化曲线,计算出釉熔体中硅锌矿的结晶是非热因成核机理和扩散控制一维方向生长共同作用导致的。
The authors measured zirconia samples consisting of all monoclinic (m) phase, (M-PSZ) ZrO 2 -MgO synthesized at 1500-1550 ° C and all-cubic zirconia samples sintered at 1700-1750 ° C, The phase transition from room temperature to 1190 ℃; the formation temperature of the catalytic phase in the iron-potassium catalyst; and the crystallization rate of willemite in the willemite of willemite. The results show that the phase transition of zirconia during heating and cooling is m-ZrO 2 (ss) t (tetragonal) -ZrO 2 (ss). The samples of M-PSZ and cubic zirconia were heated to about 1000 ℃, C-ZrO 2 (ss) began to be transformed into m-ZrO 2 (ss), and the MgO was eluted and transformed into m-ZrO 2 (T-ZrO 2) is cooled to 850-400 ° C. and then changed from t-ZrO 2 (ss) to m-ZrO 2 (ss). Finally, at room temperature, C + t) -ZrO 2 (ss) and the desolventized MgO. The catalytic phase (KFeO_2) in the iron-potassium catalyst started to form at 250 ℃, and crystallized at 650 ℃ and remained unchanged at 950 ℃. However, after cooling to room temperature and standing overnight, the KFeO_2 phase disappeared completely. In order to study the crystallization kinetics of willemite, the crystallization of willemite in the glaze melt is calculated according to the change of diffraction intensity at isothermal temperature with time, which is caused by the combination of non-thermal nucleation mechanism and diffusion-controlled one-dimensional growth of.