of the vessel 610 as detailed in fig8 a bonding material 61 may be applied between the cutout edge 635 and the structured filtration material 645 to further ensure that substantially all gases vapors liquids or particles passing between the vessel 610 and the surrounding atmosphere pass through the structured filtration material 645 the container 109 is characterized as an element or a combination of elements 610 and 630 in this case which except for any orifice passageways 695 in this case provide a substantially leak tight environment for the charge 20 in preferred embodiments of this invention the vessel e g 10 50 110 210 310 410 510 610 is comprised of a material such as mgo zro 2 or a nitride or a carbide that is a susceptor to microwaves optionally the cover e g 30 130 230 330 430 530 630 may also be comprised of a material that is a susceptor to microwaves in some applications a carbonaceous vessel or cover is not preferred because of the potential for a back reaction with the materials being processed using microwave suscepting vessels and covers permits the apparatus to be heated in a microwave oven to induce or enhance desired chemical process reactions.