ZrO_2亚微粉的搅动球磨研究

Study on Preparing of Submicron ZrO_2 Powder by Attritor Grinding

用自制的实验室小型搅动球磨机对工业ＺｒＯ＿２粉进行了球磨参数的正交试验，同时进行了搅动球磨与振动球磨动力学的对比实验，得出了两者的动力学回归方程为：０．５５７－０．１６８１ｇｔ０．７６０－０．２２２１ｇｔ研究认为，在球磨诸参数中，影响粒度显著性按以下顺序递减：球磨时间→搅棒转速→球径→球料比。研究同时得出，尽管振动球磨已是一种高效强力球磨方法，其研磨效率远高于普通滚动球磨，但仍数倍、甚至数１０倍地低于搅动球磨。在给定参数下，搅动球磨ｌｈ即可获得～０．５μｍ的ＺｒＯ＿２粉，而用振动球磨却需１６ｈ。

A study on the grinding of conmmercial ZrO_2 powder following orthogonal Design wascarried out by a desk-attritor made in our laboratory.A comparison of comminution Kineties betweenattritor grinding and vibratory milling was alsodealt with.The regression equation of comminutionkinetics were obtained as follow:0.557-0.1681gt 0.760-0.2221gtVariance test proved that the line-relativity was significant.The resuIts of experiments indicated thatthe significance influencing particle size decreasesaccording to the order:milling time→rotationalspeed of attritor bar→diameter of ball→ball/chargeratio. The resuIt also indicated that the grinding efficiency for attritor is much higher than that of vibratiory milling,though the latter is also an efficient powder milling Tnethod; The ZrO_2 powderwith the average particle size of about 0.5μm couldbe obtained in l hour by attritor but 16 hour by vibratory at a certain condition.