Are there cryogenic peltiers
I was wondering if there is such a thing as a cryogenic peltier cooler, are there any that are available on the consumer market not just in high-tech labs. The reason that i ask is because liquid nitrogen is relatively cheap and liquid helium is expensive, so i thought that a peltier could be used to cool an object from 77k to 39k, the the peltiers that i have found for sale are not rated for such low temperatures, are there any devices similar to a peltier that i could use to cool a small object from 77k to under 39k which is the superconducting temperature of Magnesium diboride.
I was wondering if there is such a thing as a cryogenic peltier cooler, are there any that are available on the consumer market not just in high-tech labs. The reason that i ask is because liquid nitrogen is relatively cheap and liquid helium is expensive, so i thought that a peltier could be used to cool an object from 77k to 39k, the the peltiers that i have found for sale are not rated for such low temperatures, are there any devices similar to a peltier that i could use to cool a small object from 77k to under 39k which is the superconducting temperature of Magnesium diboride.
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