For such kind of very low loss material it may help to het them first by other means than microwave and from say 700 C onwards (since the dielectric losses string increase with temperature) use microwaves but the question remains: why using microwave at all in thus case
Fritz Caspers Tank you for the method. Primary interest is to asses the dielectric properties of MW sintered component in comparison with conventionally sintered ones to see whether the grain growth and microstructures are same or different. Did a preliminary assessment on binder removal in conventional upto 500 C and sintering upto 670 C.