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I think you'll need to buy the equipment. A 2g sample, even with a high heat capacity is going to heat up pretty fast and you'll have problems with the time delay of the thermocouples and in your ability to record temperatures. The equipment was made because people have a very difficult time measuring the thermal properties of small sample sizes. The fact that it is in a powder form only makes it worse since you'll probably have a 30% void fraction (meaning you'll be heating up air trapped in the sample at the same time and screwing up your measurements even more)
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