公开(公告)号：US4932166A

公开(公告)日：1990-06-12

申请号：US252751

申请日：1988-10-03

申请人： Wolfgang D. G. Boecker ,  Tadeusz Korzekwa ,  Lewis M. Koppel

发明人： Wolfgang D. G. Boecker ,  Tadeusz Korzekwa ,  Lewis M. Koppel

IPC分类号： B02C17/14 ,  B02C17/16 ,  B02C17/20 ,  B02C23/18 ,  C04B35/565

CPC分类号： B02C17/14 ,  B02C17/16 ,  B02C17/20 ,  B02C23/18 ,  C04B35/565

摘要： A method for grinding an oxygen sensitive ceramic material to a powder which comprises grinding an oxygen sensitive ceramic feed material having an average particle size of between 1 and 200 microns in a contamination free high energy autogenous attrition mill in non-oxidizing fluid in the presence of media for a sufficient time to obtain a specific surface area of at least 5 m.sup.2 /g and preferably at least 9 m.sup.2 /g. The media consists essentially of the same ceramic as the feed material is of high purity and has an average particle size of less than 4 mm and preferably less than 2.5 mm. the ground material may be further treated so that the average particle size is less than one micron and so that the greater than 97 numerical percent of the particles of the finished powder is smaller than 5 microns. The invention includes the finished powder.

摘要翻译： 一种将氧敏感性陶瓷材料研磨成粉末的方法，该方法包括在非氧化性流体中的无污染的高能自生磨碎机中研磨平均粒度为1至200微米的氧敏感陶瓷进料， 培养基足够的时间以获得至少5m 2 / g，优选至少9m 2 / g的比表面积。 介质基本上由与原料高纯度相同的陶瓷组成，平均粒度小于4毫米，最好小于2.5毫米。 可以进一步处理研磨材料，使得平均粒度小于1微米，使成品粉末的颗粒的大于97数值百分比小于5微米。 本发明包括成品粉末。

公开(公告)号：US4896017A

公开(公告)日：1990-01-23

申请号：US268119

申请日：1988-11-07

申请人： Lewis M. Koppel ,  Jonathan J. Kim ,  Viswanathan Venksteswaran

发明人： Lewis M. Koppel ,  Jonathan J. Kim ,  Viswanathan Venksteswaran

IPC分类号： H05H1/34

CPC分类号： H05H1/34 ,  H05H2001/3478 ,  H05H2001/3484

摘要： An anode for plasma torch that has a primary section and a secondary section with a gradual transition between the sections. The diameter of the hollow primary section tapers down toward a transition zone, at which point the anode formed by the sections makes a gradual transition to the secondary section. The secondary section is cylindrical and has a diameter larger than that of the primary section from which the plasma exists the anode. The transition zone will describe a generally conical surface and may include a convex radius on the neck where the primary and transition sections meet.

摘要翻译： 用于等离子体焰炬的阳极，其具有初级部分和在部分之间逐渐过渡的次级部分。 中空初级部分的直径朝向过渡区域逐渐变细，此时由这些部分形成的阳极逐渐向第二部分转变。 次级部分是圆柱形的，其直径大于等离子体从该部分开始的阳极的直径。 过渡区域将描述一个大致圆锥形的表面，并且可以在颈部上包括初级和过渡段相遇的凸半径。