Process for heating materials by microwave energy

Details Process for heating materials by microwave energy Process for heating materials by microwave energy

H - Electricity

05

B

327/2.1

H05B 6/80 (2006.01) C04B 35/111 (2006.01) C04B 35/64 (2006.01) C04B 37/00 (2006.01)

Patent

CA 1313230

- 1 - Abstract: The invention provides a process for preparing a heat-treated body from a material (preferably a dielectric ceramic) that does not couple well with microwaves while nevertheless using microwave energy for the heating step. The process involves the use of a microwave susceptor (i.e. a material that couples well with microwaves) as a means for generating heat in the material. However, to prevent contamination of the final product with the susceptor, the susceptor is chosen from substances which following the heating step, are substantially indistinguishable from the remainder of the material forming the heat-treated body. Alpha-alumina may be heated in this way by employing sub- alpha alumina as the susceptor. The resulting substantially pure heat-treated (and preferably sintered) bodies can be used for a variety of purposes, e.g. as substrates for micro-electronic devices.

579522

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