数据记录与处理.doc

数据记录与处理 绘出样品的磁滞回线，基本磁化曲线，及曲线，并从相应的曲线上读取饱和磁感应强度，饱和磁场强度，剩磁和矫顽力等相关物理量。表1初始磁化曲线相关数据记录处理表I/mAB/mTH/0.00020.04.1140.650640.08.6278.626560.014.5407.240580.020.6534.5172100.027.8654.4382150.051.6915.4563200.080.31143.708250.0110.51361.93300.0140.41582.157350.0168.71813.084400.0195.22056.047450.0218.42321.077500.0238.42607.506550.0254.92917.339600.0270.13235.865根据式（4） 又N=2000匝及表1可计算出H，然后填入上表1中。初始磁化曲线如下图所示。表2磁滞回线相关数据记录处理表I/mAB/mTH/Am-1600.0273.43213.798550.02692823.053500.02642436.319450.02582056.273400.02511682.914350.0242.11322.26300.0229.2988.3538250.0214.9663.8095200.0194.2382.0618150.0168.5133.7489100.0138.6-86.478680.0125-163.60360.0112.1-245.40840.098.3-321.19520.084.6-397.6510.070.7-472.769-20.056.4-545.213-40.042.2-618.325-60.028.5-694.78-80.014.3-767.893-100.00-840.336-150.0-35.3-1024.45-200.0-70.2-1211.25-250.0-104.1-1404.73-300.0-137.3-1602.89-350.0-168.4-1815.09-400.0-196.8-2045.35-450.0-221.4-2301.02-500.0-242-2583.43-550.0-258.6-2892.6-600.0-271.6-3225.83-550.0-267-2836.43-500.0-262-2449.69-450.0-256.6-2065.63-400.0-249.8-1690.94-350.0-240.7-1331.62-300.0-229.4-987.016-250.0-214.4-667.153-200.0-194.4-380.724-150.0-169.5-127.062-100.0-139.592.49685-80.0-126.8175.6395-60.0-113.9257.4447-40.0-86.3240.9515-20.0-76.4342.81760.0-72.5484.805720.0-36.7413.479240.0-32.9556.135960.0-28.2692.774480.0-15.1773.2422100.0-1.7851.704100.60845.3782150.033.11039.165200.067.31230.639250.0101.61421.444300.0134.11624.285350.01651837.826400.0193.72066.078450.0217.32328.433500.0237.52613.524550.0253.62926.032600.0266.83257.932根据式（4） 又N=2000匝及表2可计算出H，然后填入上表2中。表3 基本磁化曲线与磁导率数据记录表I/mAB/mTH/Am-10.00020.03.8142.65670.02663740.08.5279.29520.03043460.013.8411.92140.03350280.020.2537.1920.037603100.028.1652.43210.04307150.053.9900.07630.059884200.082.71127.6590.073338250.01141338.5250.085168300.01451551.3970.093464350.0175.11770.2870.098911400.02022010.5760.100469450.0225.42274.2680.099109500.0241.92584.1010.093611550.0259.52886.5790.089899600.0273.23215.1350.084973根据式（4） 及又N=2000匝及表3可计算出H，然后填入上表3中。由磁滞回线可知饱和磁感应强度,饱和磁场强度，剩磁164 mT,矫顽力思考与讨论1. 为什么测量前必须先进行退磁？如何进行？答：由于磁滞效应，先前的使用操作可能使得样品本身已具有一定的磁性，为避免其带来的使用误差，就需要进行退磁操作，以减少数据误差。将磁化线圈通较大电流，是铁磁材料达到磁饱和状态；然后，一边改变电流方向一边减小电流，直到为零。2. 什么是软磁材料？什么是硬磁材料？举例说明他们各自的应用。答：软磁材料是具有低矫顽力和高磁导率的磁性材料；硬磁材料是指磁化后不易退磁而能长期保留磁性的一种铁氧体材料。用途有：发电机、电动机、变压器、电磁铁、各类继电器与电感、电抗器的铁芯：磁