Q and ppm in capacitors. Which ones are better?

[neazoi]

I wonder which capacitor has the highest Q and the greater capacitance stability?
1. Silver plated air dielectric
2. Silver mica
3. NP0 GOG?

 

[yura717]

Hi-Q Multilayer Ceramic

 

[neazoi]

Hi-Q Multilayer Ceramic

You mean these capacitors used on microwaves?
I thought nothing would be better than a silver plated air dielectric capacitor?

 

[yura717]

Than you can use vacuum capacitors by **broken link removed**