流体静高压原位磁测量的误差研究（三）——综合兼顾两种影响

 先后选用1至3片非晶Fe_46.3Co_0.03Ni_46.5Si_3.75V_0.92B_2.5合金薄带作样品，插入13层密绕直螺线管内，分别在高静水压容器内和其他四种不同环境中测量它们的磁化曲线、磁导率曲线和起始磁化曲线，再次研究了初级线圈采用多层直螺线管对铁镍合金样品的误差。（１）实验结果表明：既存在样品材料被磁化而形成的退磁场H'，也存在漏磁通引起周围铁器磁化而形成的退磁场H'。（２）为了缩小H'的影响，只用1片非晶合金薄带作样品时，H'的影响变得严重，导致μ_m和μ_i出现惊人的误差：Δμ_m/μ_m=50%，Δμ_i/μ_i＝104%。（３）为了综合兼顾这两种影响，采用3片非晶合金薄带作样品时，虽然H'的影响增大一点，但是H'的影响被更多地削弱，所以环境磁化引起的误差反而减小：Δμ_m/μ_m=29%，Δμ_i/μ_i＝15.5%。

EXPERIMENTAL INVESTIGATION ON THE ERRORS OF THE IN SITU MAGNETIC MEASUREMENTS IN HYDROSTATIC HIGH PRESSURE VESSEL(3)--COMPREHENSIVE CONSIDERATION OF TWO INFLUENCES

In order to investigate the errors of the primary coil with multiple electric solenoid, we selected two samples using different slice-number (n=1, 3) of amorphous alloy Fe_46.3Co_0.03Ni_46.5Si_3.75V_0.92B_2.5 ribbon, inserted into the 13 layers electric solenoid and measured the magnetization, magnetic permeability curve and initial magnetization curves, separately, in the hydrostatic pressure vessel and under other four different ambient conditions. (1) We find that there exist both a demagnetic field H' of the magnetized sample and a demagnetic field H' of the neighbor iron magnetized by leakage flux. (2) To reduce the influence of H', we take one slice of amorphous alloy ribbon as the sample, but the influence of H' becomes serious as the errors of μ_m and μ_i increase to Δμ_m/μ_m=50%, Δμ_i/μ_i＝104%. (3) Comprehensively taking into account these two influences, we take three slices of amorphous alloy ribbon as the sample, although the influence of H' increases a little, the influence of H' is weakened significantly, so the errors of μ_m and μ_i decrease to Δμ_m/μ_m=29%, Δμ_i/μ_i＝15.5%.