| The molybdenum sheet with contents of La2O3 1.0 or less 1.0 percent in weight has prosperous future. In this paper, we begin with MoO3 powder which doping some La2O3, through experiments, we introduce the preparations for La-Mo billet, rolling and recrystal of La-Mo sheet, and mechanic performance of molybdenum sheet in normal and high temperature in detail, especially, we present quantity results for molybdenum sheet's recrystal. On the other hand,made microstructure and mechanic contrast between sigle-direction rolling molybdenum sheet and cross rolling molybdenum sheet.At the beginning of doping La2O3 into MoO3, there is influence on the state of MoO3 powder, the two phases experiment results of deoxidize powder show that La2O3 has an evident power for fine the powder granule. Through contrast the size of the sinter sample granule between contents of La2O3 0.2,0.5 and 4.0 percent in weight with pure molybdenum ,we can find: La2O3 have fine the granule in the sinting process.The rolling craft of molybdenum sheet mixing with some La2O3 doesn't equal to the craft of pure molybdenum sheet. In order to get high quality molybdenum sheet, we should properly improve the temperature of breakdown rolling ,finish thermo-rolling and tempreture rolling, and add annealing tempreture in cold rolling process,Whether single-direction molybdenum sheet or cross molybdenum sheet,the adding of La2O3 improve the temperature of recrystallion dramatically, adding more La2O3, the temperature of recrystallion improves more, moreover, the mechanic performance under high temperature and normal temperature performance after high temperature anneal are greatly improved. Through the compare of structure and performance of two kind molybdenum sheets in general, one kind of molybdenumsheets is got through single direction rolling, the other kind is got through crossrolling, we found that the temperature of crossrolling molybdenum sheet's recrystallion is lower than that of single direction rolling molybdenum sheet.
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