초록 ▼

An improved catalyst including a compound of the formula (I) AaMmNnXxOo (I) wherein 0.25

An improved catalyst including a compound of the formula (I) AaMmNnXxOo (I) wherein 0.25

대표청구항 ▼

An improved catalyst including a compound of the formula (I) AaMmNnXxOo (I) wherein 0.252SiO4,CaSiO3,BaSiO3and/or SrSiO3. 4. The electronically tunable dielectric material of claim 1, wherein the barium strontium titanate is of the formula BaxSr1-xTiO3,where x is from about 0.15 to about 0.6. 5. The

An improved catalyst including a compound of the formula (I) AaMmNnXxOo (I) wherein 0.252SiO4,CaSiO3,BaSiO3and/or SrSiO3. 4. The electronically tunable dielectric material of claim 1, wherein the barium strontium titanate is of the formula BaxSr1-xTiO3,where x is from about 0.15 to about 0.6. 5. The electronically tunable dielectric material of claim 1, wherein the metal silicate comprises from about 10 to about 50 weight percent of the material. 6. The electronically tunable dielectric material of claim 1, further comprising up to about 10 weight percent of at least one additional oxide material selected from oxides of Ba, Mg, Zr, Ca, Fe, Sr, Nb, Ta, Cr, Sn, Mn, W, Al, Ti, Na, K, Nd, Pr, Y and La. 7. The electronically tunable dielectric material of claim 1, wherein the material has a tunability of at least 10 percent at 8 V/micron. 8. The electronically tunable dielectric material of claim 1, wherein the material has a tunability of at least 25 percent at 8 V/micron. 9. A method of making an electronically tunable dielectric material comprising: mixing particles of at least one electronically tunable dielectric material and particles of at least one metal silicate material, wherein the electronically tunable dielectric material comprises barium strontium titanate, the metal silicate material comprises a silicate of at least one metal selected from Be, Mg, Ca, Sr, Ba, Ra, Li, Na, K, Rb, Cs, Al, Zr, Zn, Fr, B, Fe, Mn, Cu, Ce, Cr, La, Y, Ti, Ta, Nb, Mo, W, Ni, Pd, Pb and Bi, and the metal silicate comprises from about 5 to about 65 weight percent of the material; and sintering the material. 10. The method of claim 9, wherein the electronically tunable dielectric particles and the metal silicate particles have average particle sizes of from about 0.1 to about 5 micron. 11. The method of claim 9, wherein the electronically tunable dielectric particles and the metal silicate particles have average particle sizes of from about 1.5 to about 2.5 micron. 12. The method of claim 9, wherein the metal silicate material comprises a silicate of at least one metal selected from Mg, Ca, Sr and Ba. 13. The method of claim 9, wherein the metal silicate material comprises Mg2SiO4,CaSiO3,BaSiO3and/or SrSiO3. 14. The method of claim 9, wherein the barium strontium titanate is of the formula BaxSr1-xTiO3,where x is from about 0.15 to about 0.6. 15. The method of claim 9, wherein the metal silicate comprises from about 10 to about 50 weight percent of the sintered mixture. 16. The method of claim 9, further comprising adding up to about 10 weight percent of at least one additional oxide material selected from oxides of Ba, Mg, Zr, Ca, Fe, Sr, Nb, Ta, Cr, Sn, Mn, W, Al, Ti, Na, K, Nd, Pr, Y and La to the electronically tunable dielectric and metal silicate particles. 17. The method of claim 9, wherein the sintered mixture has a tunability of at least about 10 percent at 8 V/micron. 18. The method of claim 9, wherein the sintered mixture has a tunability of at least about 25 percent at 8 V/micron.