Thermally conductive grease and methods and devices in which said grease is used

A thermally conductive grease comprising:

• (A) a combination of polyorganosiloxanes comprising
• a first polyorganosiloxane of formula (I) R1R22Si—(OSiR22)a—R3—Si(OR4)3
• where each R1 is independently an alkyl group or an alkenyl group, each R2 is independently an alkyl group, each R3 is selected from an oxygen atom and a divalent hydrocarbon group, each R4 is independently an alkyl group of 1 to 6 carbon atoms, and subscript a has an average value ranging from 5 to 200;
• a second polyorganosiloxane of formula (II) R53Si—(OSiR5R6)b(OSiR52)c—R7—SiR53
• where each R5 is an alkyl group, each R6 is an aryl group, each R7 is selected from an oxygen atom and a divalent hydrocarbon group, subscript b has an average value of at least 1, and subscript c an average value of at least 1 and with the provisos that subscript b and subscript c have average values such that a sum of (b+c) is sufficient to provide the second polyorganosiloxane with a viscosity ranging from 5 to 30,000 cSt, the amount of polyorganosiloxane of formula (II) ranges from 1% to 10% based on the combined weights of all ingredients in the grease, and the second polyorganosiloxane is compatible with the first polyorganosiloxane;
• and
• (B) a thermally conductive filler.