This study presents a broad comparison of samples, which are made of polytetrafluoroethylene (PTFE) filled with different dopants according to the same preparation steps, as propellants on a laser-electric hybrid thruster with a common design base. The impulse bit, specific impulse, efficiency and discharge success rate of the propellant samples were measured and analyzed under the same operation. The experimental results illustrated that the dopants of alloy could improve the impulse bit, that of salt could promote the stability of the discharge process, and the samples doped with oxide performed dramatic specific impulse and thrust efficiency. And three representative samples were adopted to investigate the dependence of propulsion characteristics on different working parameters in the respective doping ratios. It is found that the sample doped with TiO₂ in lower doping rate was expected to rank maximal specific impulse and efficiency at most operations, especially under the conditions of low laser energy, long discharge width and high initial voltage. And the samples doped with Co–Cr alloy in low doping ratio appeared better performance at low discharge width and laser energy, while those in high doping ratio performed greater performance at high discharge width and laser energy.

这项研究对样品进行了广泛的比较，这些样品是由聚四氟乙烯（PTFE）按照相同的制备步骤填充不同的掺杂剂制成的，作为具有共同设计基础的激光-电动混合推进器上的推进剂。在相同操作下测量并分析了推进剂样品的冲量，比冲，效率和排放成功率。实验结果表明，合金的掺杂剂可以改善脉冲位，盐的掺杂剂可以提高放电过程的稳定性，掺杂氧化物的样品具有显着的比脉冲和推力效率。并采用三个有代表性的样品研究了推进特性对各自掺杂比中不同工作参数的依赖性。在大多数操作中，尤其是在激光能量低，放电宽度长和初始电压高的条件下，较低掺杂速率的₂有望在最大比脉冲和效率上达到最高。低掺杂比掺杂Co-Cr合金的样品在低放电宽度和激光能量下表现出更好的性能，而高掺杂掺杂比在高放电宽度和激光能量下表现出更好的性能。