# US 10,246,375 B2 · Multi-phase high thermal conductivity composite dielectric materials > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,246,375 B2 - Document ID: US10246375B2 - Status: Granted - Kind: B2 - Application number: 15/470,613 - Filed: 2017-03-27 - Published: 2017-10-05 - Granted: 2019-04-02 - Earliest claimed: 2016-03-30 - Assignees: Skyworks Solutions, Inc. - Applicants: Skyworks Solutions, Inc. - Inventors: Michael David Hill - Web page: https://patentgrep.com/patent/US10246375B2 ## CPC - C04B 35/117: Composites - C04B 35/46: based on titanium oxides or titanates (containing also zirconium or hafnium oxides, zirconates or hafnates C04B35/49) - C04B 35/465: based on alkaline earth metal titanates - C04B 2235/3206: Magnesium oxides or oxide-forming salts thereof - C04B 2235/3208: Calcium oxide or oxide-forming salts thereof, e.g. lime - C04B 2235/3222: Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4) - C04B 2235/3224: Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide - C04B 2235/3225: Yttrium oxide or oxide-forming salts thereof - C04B 2235/3227: Lanthanum oxide or oxide-forming salts thereof - C04B 2235/3232: Titanium oxides or titanates, e.g. rutile or anatase - C04B 2235/3234: Titanates, not containing zirconia - C04B 2235/3236: Alkaline earth titanates - C04B 2235/3255: Niobates or tantalates, e.g. silver niobate - C04B 2235/9607: Thermal properties, e.g. thermal expansion coefficient - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE ## Abstract Disclosed herein are embodiments of materials having high thermal conductivity along with a high dielectric constants. In some embodiments, a two phase composite ceramic material can be formed having a contiguous aluminum oxide phase with a secondary phase embedded within the continuous phase. Example secondary phases include calcium titanate, strontium titanate, or titanium dioxide. ## Claims ### Claim 1 A multi-phase composite ceramic material, the material comprising: a primary phase of aluminum oxide; a first secondary phase of CaTiO3 located within the primary phase; and a second secondary phase of LaAlO3 located within the primary phase, the first secondary phase and the second secondary phase forming a multi-phase composite, the multi-phase composite having a dielectric constant of greater than 20 and a thermal conductivity of greater than 20 W·m−1·K−1. ### Claim 2 (depends on 1) The multi-phase composite ceramic material of claim 1 wherein the primary phase is generally contiguous. ### Claim 3 (depends on 1) The multi-phase composite ceramic material of claim 1 wherein the multi-phase composite has a dielectric constant of greater than 25. ### Claim 4 (depends on 1) The multi-phase composite ceramic material of claim 1 wherein the thermal conductivity is greater than 30 W·m−1·K−1. ### Claim 5 (depends on 1) The multi-phase composite ceramic material of claim 1 wherein the multi-phase composite has a temperature drift of resonant frequency lower than 1000 ppm/Degree C. ### Claim 6 A multi-phase composite ceramic material, the material comprising: an aluminum oxide phase; a first secondary phase of CaTiO3 located within the aluminum oxide phase; and a second secondary phase of La2MgTiO6 located within the aluminum oxide phase forming a multi-phase composite, the multi-phase composite having a dielectric constant of greater than 20 and a thermal conductivity of greater than 30 W·m−1·K−1. ### Claim 7 A multi-phase composite ceramic material comprising at a generally contiguous primary phase of aluminum oxide and a plurality of secondary phases, a first of the plurality of secondary phases being CaTiO3 and a second of the plurality of secondary phases being selected from the group consisting of LaAlO3, La2MgTiO6, YAlO3, SmAlO3, Mg4Nb2O9, and La4Ti3O12, the plurality of secondary phases embedded within the primary phase to form a multi-phase composite ceramic material having a dielectric constant of greater than 20. ### Claim 8 (depends on 7) The multi-phase composite ceramic material of claim 7 wherein the multi-phase composite ceramic material has a thermal conductivity of greater than 20 W·m−1·K−1. ### Claim 9 (depends on 6) The multi-phase composite ceramic material of claim 6 wherein the aluminum oxide phase is generally contiguous. ### Claim 10 (depends on 6) The multi-phase composite ceramic material of claim 6 wherein the multi-phase composite ceramic material has a dielectric constant of greater than 25. ### Claim 11 (depends on 6) The multi-phase composite ceramic material of claim 6 wherein the multi-phase composite ceramic material has a dielectric constant of greater than 35. ### Claim 12 (depends on 6) The multi-phase composite ceramic material of claim 6 wherein the multi-phase composite ceramic material has a temperature drift of resonant frequency lower than 1000 ppm/Degree C. ### Claim 13 (depends on 7) The multi-phase composite ceramic material of claim 7 wherein the multi-phase composite ceramic material has a thermal conductivity of greater than 30 W·m−1·K−1. ### Claim 14 (depends on 7) The multi-phase composite ceramic material of claim 7 wherein the primary phase is contiguous. ### Claim 15 (depends on 7) The multi-phase composite ceramic material of claim 7 wherein the multi-phase composite ceramic material has a dielectric constant of greater than 25. ### Claim 16 (depends on 1) The multi-phase composite ceramic material of claim 1 wherein the multi-phase composite ceramic material has a dielectric constant of greater than 35. ### Claim 17 (depends on 1) The multi-phase composite ceramic material of claim 1 further including Mg4Nb2O9. ### Claim 18 (depends on 1) The multi-phase composite ceramic material of claim 1 further including La4Ti3O12. ### Claim 19 (depends on 7) The multi-phase composite ceramic material of claim 7 wherein the ceramic material includes YAlO3. ### Claim 20 (depends on 7) The multi-phase composite ceramic material of claim 7 wherein the ceramic material includes SmAlO3.