what is the difference between a fast recovery diode and a rectifier diode?

What is the difference between a fast recovery diode and a rectifier diode?

When the fast recovery diode circuit fails, can it be replaced with a rectifier diode? What's the difference between the two? Consider parameter requirements as well as costs.

Fast recovery rectifier diode belongs to the high-frequency rectifier diode in the rectifier diode, suitable for high-frequency circuit occasions, low frequency such as power frequency 50HZ below the ordinary rectifier diode.

fast recovery diode Rectifier diodes are commonly used in inverter circuits with higher frequencies. However, because the rectifier circuit is very low frequency, it only has requirements for withstand voltage, as long as the withstand voltage can be met, it can definitely be replaced, and the fast recovery diode is also used for rectification, that is, in the switching power supply secondary rectifier part, due to the high frequency, only the fast recovery diode rectification, otherwise due to the diode loss is too large will cause the overall efficiency of the power supply to decrease, and the diode will be burned in serious cases. In addition, when it comes to the cost issue, the price of fast recovery diode is much more expensive than rectifier diodes, and the higher the withstand voltage, the more expensive, so it is generally not used by fast recovery second-generation tubes.