Abstract: A ceramic composite for light conversion, which can make the fluorescence dominant wavelength longer up to 580 nm, further arbitrarily adjust the wavelength in the range of 570 to 580 nm, and undergoes no decrease in fluorescence intensity even when the fluorescence dominant wavelength is made longer, with luminescence unevenness suppressed. A light-emitting device comprising ceramic composite mentioned above. The ceramic composite for light conversion is a solidified body including a composition expressed by the following formula (1), where the composition has a structure where at least two oxide phases of a first phase and a second phase are continuously and three-dimensionally entangled mutually, and the ceramic composite for light conversion is characterized in that the first phase is a (Tb, Y)3Al5O12 phase activated with Ce for producing fluorescence, whereas the second phase is an Al2O3 phase.

Abstract: A ceramic composite for light conversion, and method of producing same and a light emitting device including the same. The ceramic composite for light conversion of the present invention is a solidified body having a structure in which at least two oxide phases including a first phase and a second phase are continuously and three-dimensionally intertwined with one another, and characterized in that the first phase is a Y3Al5O12 phase including Ba or Sr and activated with fluorescent Ce, the second phase is an Al2O3 phase, and the Sr or Ba in the solidified body are contained in an amount of 0.01 to 1.00 part by mass based on 100 parts by mass of the solidified body, in terms of the oxide.

Abstract: A ceramic composite for light conversion, which can make the fluorescence dominant wavelength longer up to 580 nm, further arbitrarily adjust the wavelength in the range of 570 to 580 nm, and undergoes no decrease in fluorescence intensity even when the fluorescence dominant wavelength is made longer, with luminescence unevenness suppressed. A light-emitting device comprising ceramic composite mentioned above. The ceramic composite for light conversion is a solidified body including a composition expressed by the following formula (1), where the composition has a structure where at least two oxide phases of a first phase and a second phase are continuously and three-dimensionally entangled mutually, and the ceramic composite for light conversion is characterized in that the first phase is a (Tb, Y)3Al5O12 phase activated with Ce for producing fluorescence, whereas the second phase is an Al2O3 phase.

Abstract: Provided are a ceramic composite for light conversion, which is capable of maintaining a high radiant flux even when the proportion of Gd and Ce is increased to tune the fluorescence peak wavelength to the longer wavelength side, a process for producing the ceramic composite, and a light emitting device including the ceramic composite.

Abstract: A ceramic composite for light conversion, and method of producing same and a light emitting device including the same. The ceramic composite for light conversion of the present invention is a solidified body having a structure in which at least two oxide phases including a first phase and a second phase are continuously and three-dimensionally intertwined with one another, and characterized in that the first phase is a Y3Al5O12 phase including Ba or Sr and activated with fluorescent Ce, the second phase is an Al2O3 phase, and the Sr or Ba in the solidified body are contained in an amount of 0.01 to 1.00 part by mass based on 100 parts by mass of the solidified body, in terms of the oxide.

Abstract: Provided are a ceramic composite for light conversion, which is capable of maintaining a high radiant flux even when the proportion of Gd and Ce is increased to tune the fluorescence peak wavelength to the longer wavelength side, a process for producing the ceramic composite, and a light emitting device including the ceramic composite.

Abstract: A dielectric ceramic composition which can be sintered at such a temperature of about 800 to 1000° C. as to permit incorporation of and multilayer formation with a low resistant conductor such as Ag or Cu by the simultaneous sintering with the low resistant conductor, which is sintered to form dielectric ceramics having a dielectric constant ?r of not more than 10, and a resonator having a large Q×f0 value and an absolute value in temperature coefficient ?f of resonance frequency f0 of not more than 20 ppm/° C., the value being easy to be controlled. The dielectric ceramic composition contains a glass component in an amount of 5 to 150 parts by weight based on 100 parts by weight of a main component represented by general formula: aZnAl2O4-bZn2SiO4-cTiO2-dZn2TiO4, in which the molar fractions of respective components a, b, c, and d satisfy 5.0?a?80.0 mol % 5.0?b?70.0 mol %, 5.0?c?27.5 mol %, 0?d?30.

Abstract: A dielectric ceramic composition which can be sintered at such a temperature of about 800 to 1000° C. as to permit incorporation of and multilayer formation with a low resistant conductor such as Ag or Cu by the simultaneous sintering with the low resistant conductor, which is sintered to form dielectric ceramics having a dielectric constant ?r of not more than 10, and a resonator having a large Q×f0 value and an absolute value in temperature coefficient ?f of resonance frequency f0 of not more than 20 ppm/° C., the value being easy to be controlled. The dielectric ceramic composition contains a glass component in an amount of 5 to 150 parts by weight based on 100 parts by weight of a main component represented by general formula: aZnAl2O4-bZn2SiO4-cTiO2-dZn2TiO4, in which the molar fractions of respective components a, b, c, and d satisfy 5.0?a?80.0 mol % 5.0?b?70.0 mol %, 5.0?c?27.5 mol %, 0?d?30.0 mol % (a+b+c+d=100 mol %).

Abstract: A dielectric ceramic composition mainly comprises a major component which comprises barium, titanium, neodymium, samarium and oxygen and is represented by the following compositional formula:xBaO-yTiO.sub.2 -zNd.sub.2 O.sub.3 -tSm.sub.2 O.sub.3wherein 0.1.ltoreq.x.ltoreq.0.2; 0.5.ltoreq.y.ltoreq.0.8; 0.01.ltoreq.z.ltoreq.0.2; 0.ltoreq.t.ltoreq.0.2, provided that x+y+z+t=1); and a minor component mainly comprising glass powder having a softening point of about 100.degree. to about 500.degree. C., which mainly comprises PbO, ZnO and B.sub.2 O.sub.3, and GeO.sub.2, and wherein the content (a) (% by weight) of the glass powder falls within the range of 1.ltoreq.a.ltoreq.25 and the content (b) (% by weight) of GeO.sub.2 falls within the range of 0.5.ltoreq.b.ltoreq.10, on the basis of the weight of the major component. The major component may further comprise Bi.sub.2 O.sub.3 and the composition may comprise bismuth as a minor component.