I. Overview 
        This instrument is used to determine ceramics, refractories and other solid materials, especially corundum, refractory, casting with a shell and thermal expansion coefficient of the core material. Provide the necessary means of testing for factories, scientific research institutions to detect ceramic, glaze and inorganic materials, products, performance and research, teaching, also applies to GB / T3810.9, GB / T3810.10-2006 of ceramic tiles Determination of linear thermal expansion . 
Second, the technical parameters 
1, the maximum temperature: 1000 ℃, 1400 ℃, 1600 ℃ by the customer choice. 
2, heating rate: 0-20 degrees / min adjustable, microcomputer temperature control. 
3, the computer automatically calculates the coefficient of expansion, volume expansion, linear expansion. 
4, automatic calculation of compensation and automatic compensation coefficient can also be manually corrected (online). 
5, automatic recording, storage, printing number noted, printing temperature - expansion coefficient curve. 
Temperature spacing set free, the minimum spacing 1 ℃. 
6, the expansion measurement range: ± 2.5mm. 
7, measuring swelling value resolution: 0.1um, automatic calibration range. 
8, sample size: Ф6 ~ 10 × 50mm, 10 × 10 × 50mm. 
9, using said this linear bearing drive, to achieve expansion of value-free friction transmission, transmission accuracy and repeatability is excellent. 
 
11, the power supply voltage: 220V ± 10%, 2KW. 
12, the instrument is equipped with a standard computer interface, associated with general-purpose computer, the computer interface for all test operations are complete, easy to learn and easy to operate and provides a full set of software. 
Third, the composition of the instrument and the simple principle 
 
            Instruments by loading sensor devices, resistance furnace, trolley, pedestal, electrical control box of five parts, the sample chamber within the furnace temperature after expansion, top with the same amount of produce the amount of expansion in the test specimen ends of the rod (If you do not count the amount of thermal deformation of the system, then), this expansion to accurately measure the amount of displacement sensors and instrumentation inductor out by the instrument display. 
         To eliminate the effects of system thermal deformation of the test results, the calculation should be coupled with a corresponding expansion of the compensation value is real value of the sample. 
10, the system measurement error: ± 0.1-0.5%.