Baf2 Crystal Machining

This paper introduces the properties of BaF2 crystal material. According to these properties material selecting is discussed including initial separation and finish separation, e.g. checking crystal lithogenesis, intercalation, cloud, uniformity and stress and so on. Determine methods are given also. The BaF2 machining technology is studied. Comparing different cutting methods we select the cutting method with steel saw blade. For the soft and brittle properties of BaF2, we probe the rough lapping finish lapping and polishing and for different procedure give selecting principle for abrasive, spindle rotating speed, machining allowance, size tolerance, and iris and relative data. Through machining experiments we find that the workpieces machined adopting the technology proposed in this paper can meet the drawing requirement e.g. N=1, Delta N=0.1, center thickness d=4 +/- 0.10 surface roughness Ra0.008 mu m(P=III). The paper also points out some problems should be attended to in machining BaF2 crystal.