I'm trying to find modern instrumentation for doing impedance spectroscopy on ceramic pellets (diameter = ~12.5 mm, thickness = ~1 mm) across different temperatures - up to several hundred degrees Celsius. I have little experience working directly with electrical properties or equipment for measuring these properties, so I'm not familiar with the kind of instrumentation necessary to perform these measurements.

If there's no single instrument that does this, then what kind of setup would I use to get these results? What company should I be looking to purchase from?

Temperature range (room temp - 500°C or more). Frequency range (10^-2 Hz - 10^7 or more)

EDIT: I found out what kind of devices I would need - LCR meters and/or impedance analyzers combined with frequency response analyzers like those available at the following link: https://www.newtons4th.com/products/impedance-analyzers/

I still to find a sample holder or stage that would allow us to get impedance data at high temperature. Or even below room temp. Especially one that would attach to the analyzer in the link.