我们采用自行建立的精密自动绝热量热装置(见图1),将加热器的绕线Karma合金丝作试样,稍加改进量热操作技术,精确测定了70—440K温度区间Karma合金丝的电阻率。先将图1中薄壁紫铜管加热器涂绝缘漆,螺旋双绕Karma合金丝,再涂漆固定,注意防止漆层剥落。引出丝的末端以备测量电压电流。铜管 We use the self-established precision automatic adiabatic calorifier (see Figure 1), the heater winding Karma alloy wire as a sample, a slight improvement in calorimetric operation technology, accurate measurement of the temperature range of 70-440K Karma alloy wire Resistivity. First, thin-walled copper tube heater in Figure 1 coated insulation paint, spiral wound double Karma alloy wire, and then painted fixed, to prevent paint peeling off. Lead the end of the wire in preparation for measuring the voltage and current. Brass