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1.油扩散泵与水银扩散泵的比较 水银扩散泵是1915年发明的,但自1928年发现可以用油作为工作液体代替水银后,水银扩散泵不太被人们重视,油扩散泵便发展很快。1938年已经出现了金属三级分馏油扩散泵。油扩散泵发展后,在大部分实验室研究工作和工业上的用途上它代替了水银扩散泵。这是因为油的蒸气压比水银小的多。室温下扩散泵油蒸气压在10~(-5)—10~(-9)毫米水银柱范围内,而水银蒸气压大约为10~(-3)毫米水银柱。因此使用水银扩散泵时,必须
1 oil diffusion pump and mercury diffusion pump comparison The mercury diffusion pump was invented in 1915, but since 1928 found that oil can be used as a working fluid instead of mercury, the mercury diffusion pump is not much attention, the oil diffusion pump will be very developed fast. In 1938 there has been a metal three fractionation oil diffusion pump. After the development of the oil diffusion pump, it replaced the mercury diffusion pump in most of the laboratory research and industrial uses. This is because the oil has a much lower vapor pressure than mercury. Diffusion pump at room temperature oil vapor pressure in the 10 ~ (-5) -10 ~ (-9) mm mercury column, and mercury vapor pressure of about 10 ~ (-3) mm mercury column. Therefore, the use of mercury diffusion pump, must