The effect of particle gradation on the density and properties of silicon carbide heating elements
The main component of silicon carbide heating elements is SiC, the average firing temperature is over 2200 DEG C, the use of temperature is usually below 1600 DEG C, the normal continuous service life is more than 2000h. The utility model has the advantages of high use temperature, good oxidation resistance, fast heat conduction, strong heat radiation ability, small thermal expansion coefficient, high thermal efficiency, low energy consumption, etc.. The utility model has the advantages of simple operation, parallel connection, series connection, and mixed use, can be installed horizontally or vertically, and has high cost performance.
The working parts of silicon carbide for the hot end. At present, the domestic hot end density of silicon carbide is around 2.40 and the use of temperature is not higher than 1550. While some foreign silicon carbide heating elements density can reach 2.55~2.60, using the temperature reached 1600 degrees Celsius, the heating efficiency
And life is far more than domestic. Therefore, study on the preparation process of silicon carbide heating elements to improve the use of domestic temperature of silicon carbide, and reduce resistance, has an important significance to improve the thermal efficiency.