【摘要】 在 1 0 - 5乇真空条件下 ,对 Zr O/W(多晶 )的逸出功 和发射常数 A进行了测量。实验结果 为 3.0 5e V,A为 1 .1 6× 1 0 - 2 (安 /厘米 2 ·度2 ) ,表明用多晶钨代替单晶钨 ,也能得到很低的逸出功值 ,其应用价值是好的。更多还原

【Abstract】 At the residual pressure 10 -5 Torr we have measured the work function φ and emitting constant A.The results are:φ is 3.05 eV;A is 1.16×10 -2 (A/cm 2·K 2)。Our experiments showed that the value of work function is also very low by use poly crystal W instead of single crystal W.So it can have very good applications.更多还原