Dual-phase high thermal conductivity composite dielectric materials

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.

1 . A radiofrequency component formed from a ceramic material comprising:
 a primary phase of aluminum oxide;   a first secondary phase of CaTiO 3 ; and   a second secondary phase of LaAlO 3 , the first and second secondary phases located within the primary phase forming a composite ceramic material, the composite ceramic material having a dielectric constant of greater than 20 and a thermal conductivity of greater than 20 W·m −1 ·K −1 .   
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . The radiofrequency component of  claim 1  wherein the radiofrequency component is incorporated into solid state lighting. 
     
     
         5 . The radiofrequency component of  claim 1  wherein the radiofrequency component is incorporated into a cellular tower. 
     
     
         6 . The radiofrequency component of  claim 1  wherein the primary phase is generally contiguous. 
     
     
         7 . The radiofrequency component of  claim 1  wherein the composite ceramic material has a dielectric constant of greater than 25. 
     
     
         8 . The radiofrequency component of  claim 1  wherein the composite ceramic material has a dielectric constant of greater than 35. 
     
     
         9 . The radiofrequency component of  claim 1  wherein the composite ceramic material and a thermal conductivity of greater than 30 W·m −1 ·K −1 . 
     
     
         10 . A radiofrequency component formed from a ceramic material comprising:
 a primary phase of aluminum oxide;   a first secondary phase of CaTiO 3 ; and   a second secondary phase of Lg 2 MgTiO 6 , the first and second secondary phases located within the primary phase forming a composite ceramic material, the composite ceramic material having a dielectric constant of greater than 20 and a thermal conductivity of greater than 20 W·m −1 ·K −1 .   
     
     
         11 . The radiofrequency component of  claim 10  wherein the radiofrequency component is incorporated into solid state lighting. 
     
     
         12 . The radiofrequency component of  claim 10  wherein the radiofrequency component is incorporated into a cellular tower. 
     
     
         13 . The radiofrequency component of  claim 10  wherein the primary phase is generally contiguous. 
     
     
         14 . The radiofrequency component of  claim 10  wherein the composite ceramic material has a dielectric constant of greater than 25. 
     
     
         15 . The radiofrequency component of  claim 10  wherein the composite ceramic material has a dielectric constant of greater than 35. 
     
     
         16 . The radiofrequency component of  claim 10  wherein the composite ceramic material and a thermal conductivity of greater than 30 W·m −1 ·K −1 . 
     
     
         17 . A radiofrequency component formed from a ceramic material comprising:
 a primary phase of aluminum oxide;   a first secondary phase of CaTiO 3 ; and   a second secondary phase selected from the group consisting of LaAlO 3 , La2MgTiO6, YAlO3, SmAlO3, Mg4Nb2O9, and La4Ti3O12, the first and second secondary phases located within the primary phase forming a composite ceramic material, the composite ceramic material having a dielectric constant of greater than 20.   
     
     
         18 . The radiofrequency component of  claim 17  wherein the radiofrequency component is incorporated into solid state lighting. 
     
     
         19 . The radiofrequency component of  claim 17  wherein the radiofrequency component is incorporated into a cellular tower. 
     
     
         20 . The radiofrequency component of  claim 17  wherein the composite ceramic material has a dielectric constant of greater than 25. 
     
     
         21 . The radiofrequency component of  claim 17  wherein the composite ceramic material has a dielectric constant of greater than 35. 
     
     
         22 . The radiofrequency component of  claim 17  wherein the composite ceramic material and a thermal conductivity of greater than 20 W·m −1 ·K −1 .