I've been thinking about this all day, and I have no idea if it is possible, but here's my ideas. They could be very useful in electronics.

Platinum PLTN (Solid)

Burns slowly when ignited above 1000C
Melts at 2000C into LTPN (Liquid Platinum)
Conducts electricity twice as fast as METL
Sparks increase the temperature by 100C each

Liquid Platinum LPTN (Liquid)

Solidifies at 1500C into PLTN or PLDM, depending on which it touches first, else it will stay LPTN
NEUT turns it into LAVA
As conductive as WATR

Palladium PLDM (Solid)

Melts at 2000C into LPTN
Similar to SPNG. Absorbs one particle per 200C increase (-200 to 0:0, 0 to 200: 1, 200 to 400: 2 and so on, up to 1000C+ which will absorb 5)
Can absorb Gases, Liquids and Powders
NEUT turns it into PLTN

So yeah, I've gone a bit too in-depth, so I should stop now.

Okay, here are some uses:

>Platinum can be used extensively in circuitry to make timers because by heating then cooling platinum you will always get platinum back from liquid platinum, so long as there is platinum where you want it to be.

>Liquid platinum cannot evaporate, so it can be used where a conductive liquid is needed in very hot places.

>Platinum can be used as a heat generator, get the timing right and it will constantly produce large amounts of heat without melting.

>Platinum can be used as a heat detector, as it can only burn above 1000C, so as long as there is a source of ignition.

>Palladium can be used as a kind of particle limiter, let it absorb one particle, cool it and let that particle drop through and heat again.

>Platinum can be used as a fuse. (both meanings intended, the thing you use to light explosives and the thing you put in plugs)

>Palladium can be used like a controlled E-Hole, the hotter it gets the more it can hold.

>Palladium and platinum can be used in conjunction, the platinum heats the palladium by 100C per spark, so the palladium absorbs one more particle per two sparks in an ideal world.

Oh, and the words in brackets are states, but they would probably be best if PLTN and LPTN were in Electronics and PLDM in Solids.
And regarding the fact that faster sparks means more lag, just use platinum sparingly like you would with electrode.