Phosphazene rings with (dimethylamino)ethoxy (1, 2), pyridylmethoxy (3), or (dimethylamino)propoxy (4) chains were synthesized and quaternized at the substitutent nitrogen by treatment with methyl iodide at 35 degreesC over 3-6 h to give polyiodo salts, 5-8. Subsequent metathesis with LiN(SO2CF3)(2) or NaBF4 gave the respective ionic salts, 9-13. The amide salts, 9-12, were viscous liquids with pour points at 55-100 degreesC, and the tetrafluoroborate salt, 13, was a solid, mp 168 degreesC. The compositions of 2 and 5-13 were confirmed by elemental analysis and spectroscopic methods. Compounds 1, 2, and 4 were viscous liquids (d(25) = 1.67 g cm(-3); eta(25) = 0.76-1.56 mPa s(-1)) with pour points at similar to15 degreesC. The solid polyquaternary salts, 5-8, melted at 130-194 degreesC. The ionic liquids, 9-12, had an average density of similar to1.73 g cm(-3) at 25 degreesC, and viscosities (25 degreesC) ranged between 68.3 and 139.2 mPa s(-1). A plot of the viscosities of 9-12 vs temperature revealed an almost linear correlation between 55 and 120 degreesC. Friction and wear properties of water with 0.25 wt % of 9-12 as boundary lubricant additives were evaluated on Si3N4/Si3N4 ceramic interfaces. The most significant observation is that they caused a decrease in the running-in period.