Idea for isolation material wanted

Hello,

For an experimental set-up i want to set a hot metal plate in vibrations.

temperature: ~450 °C mass of plate: 0.5 kg frequency: 0-1000 Hz max. acceration of mass: 150 m/s²

I'm searching for a material for isolating this hot plate from the vibration-excitation by a commercial shaker.

requirements:

1) low thermal conductivity (for isolating) 2) resitence to compression AND torque 3) fatigue strength 4) stiff / high bulk modulus: otherwise the material would act as a spring and wouldn'd transfer the vibrating motion. 5) easy shaping with lathe or milling machine possible

In my opinion polymers like teflon won't be stiff enough to transfer the vibration. I also thought about ceramics but I doupt they can resist vibraitonal stress.

I'm thankfull for your suggestions - best with sorce where i can buy this material in low quantities.

Thanks in advance,

Bernd