Patent ID: 9284228
Filing Date: 2016-03-15
CPC Classification: C04B,H04B,H04M

Claim Text:
1. A device for communication by radio waves having frequencies of between 800 MHz and 3 GHz comprising a ceramic housing exposed, at least in part, to the external environment of the device and through which at least a portion of said waves passes during the use of the device, this housing being at least partially composed of a sintered product exhibiting a chemical composition such that, as percentage by weight and for a total of 100%: 32%≦ZrO 1%<Y 0%≦CeO 0%≦MgO≦43%, 0%≦CaO≦37%, 0%≦SiO 0%≦Al 0%≦TiO 0%≦lanthanide oxides, except for CeO 0%≦SrO≦24%, 0%≦SiAlON compounds≦50%, other compounds ≦15%, and said sintered product comprising, as percentage by weight on the basis of the sintered product and for a total of 100%: more than 50% of a crystalline part, said crystalline part comprising, as percentage by weight on the basis of the crystalline part and for a total of 100%: more than 40% of a first crystalline phase composed of zirconia, more than 50% by weight of said zirconia being stabilized by means of a stabilizer in a quadratic and/or cubic form, the remainder being in a monoclinic form, optionally, less than 50% of a second crystalline phase composed of a compound chosen from MgAl optionally less than 10% of a third crystalline phase composed of a compound chosen from oxides of perovskite structure, oxides of spinel structure, oxides of rutile structure FO less than 5% of other crystalline phases, optionally an amorphous part comprising, as percentage by weight on the basis of the amorphous part and for a total of 100%: a first vitreous amorphous phase having the composition X less than 10% of other amorphous phases, the sum of the contents by weight of second crystalline phase and of first amorphous phase being greater than 10% and less than 50%, a SiAlON phase being a phase observing one of the following formulae: Si t is greater than or equal to 0 and less than or equal to 1, w is greater than or equal to 0 and less than or equal to 1, u is greater than or equal to 0 and less than or equal to 1, v is greater than 0 and less than or equal to 1, t+w>0, t, w, u and v being stochiometric indices standardized with respect to the highest one, rendered equal to 1; Me