Experiment 9 Linear expansion coefficient of solid
ã€Purpose requirement】
1. Determine the average linear expansion coefficient of the solid in a certain temperature range;
2. Understand the basic knowledge of temperature control and temperature measurement;
3. Use least square method to process the experimental data.
ã€Experimental Principle】
When the temperature rises, the general solid expands due to the increased thermal motion of the atoms.
ã€Instrument description】
1. A device for measuring the thermal elongation of a sample;
2. Temperature control and temperature measuring device.
ã€Experiment content】
1. Familiar with the experimental device and learn to install the sample to be tested correctly.
2. Learn to install and use temperature controllers, digital thermometers and dial gauges correctly.
3. Determine the average linear expansion coefficient from room temperature to 100 ° C.
ã€Instruments】
Serial number
equipment name
Model / Specification
Unit price (yuan)
Remarks
1
Solid linear expansion coefficient tester
DH4608
3600
PID temperature control, temperature control range, room temperature ~ 100.0 ℃, resolution 0.1 ℃; dial gauge measurement range 0 ~ 1mm, resolution 0.001mm
2
Tube type constant temperature electric furnace
3
Automatic temperature controller
4
Dial indicator
5
Sample rod to be tested
Copper, iron
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