Not just an oven. A kiln. You can do almost as well with a lost wax process.
Sintering has some advantages, though.
I was thinking high temp oven depending on just removing the vehicle, or bonding/sintering the metal particles.
There are micro-encapsulated resin coatings that are applied then heated, the heat allows the mixing of the resin and catalyst and it changes chemical structure. Without heat, the coating wipes off, but after heat, it is impervious to solvents and must be physically removed with abrasives.
As metals are not compounds, this low heat blending won’t work, but the similarity to lost wax production is closer to what is happening.