Quite possibly. Hegel was a large influence on Marx and, through Marx, most other socialist thinkers.
Alternately, the real Orwell could have been using those slogans to illustrate how states lie to their citizens, except that in the case of IngSoc the lies were more evident to fulfill the purposes of satire/parody of the flaws he saw in his own and other real-world governments. It doesn't have to be dialectical at all, and remember that when Orwell was writing the slogans of "War for Democracy, War for Peace, War to end War" were still a recent memory.
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WAR IS PEACE
FREEDOM IS SLAVERY
IGNORANCE IS STRENGTH