Abstract: A phosphor comprises europium, at least two alkaline-earth metals, and at least a Group-13 metal. In one embodiment, the phosphor has a formula selected from the group consisting of Sr4-a-zAaEuzD12O22 and Sr4-a-zAaEuzD14O25; wherein A is at least an alkaline-earth metal other than strontium; D is an element selected from the group consisting of Group-13 metals, group-3 metals, and rare-earth metals; 0<a<4; 0.001<z<0.3; and 4-a-z>0. The phosphor can be used in light sources and displays.

Abstract: An electron emissive composition comprises a barium tantalate composition in an amount of about 50 to about 95 wt %; and a ferroelectric oxide composition in an amount of about 5 to about 50 wt %, wherein the weight percents are based on the total weight of the barium tantalate composition and the ferroelectric oxide composition. A method for manufacturing an electron emissive composition comprises blending a barium tantalate composition in an amount of about 50 to about 95 wt % with a ferroelectric oxide composition in an amount of about 5 to about 50 wt % to form an electron emissive precursor composition, wherein the weight percents are based on the total weight of the barium tantalate composition and the ferroelectric oxide composition; and sintering the composition at a temperature of about 1000° C. to about 1700° C.

Abstract: An electron emissive composition comprises a barium tantalate composition of the formula (Ba1?x, Cax, Srp, Dq)6(Ta1?y, Wy, Et, Fu, Gv, Caw)2O(11±?) where ? is an amount of about 0 to about ?3; and wherein D is either an alkali earth metal ion or an alkaline earth ion; E, F, and G, are alkaline earth ions and/or transition metal ion; x is an amount of up to about 0.7; y is an amount of up to about 1; p and q are amounts of up to about 0.3; and t is an amount of about 0.05 to about 0.10, u is an amount of up to about 0.5, v is an amount of up to about 0.5 and w is an amount of up to about 0.25. A method for manufacturing an electron emissive composition comprises blending a barium tantalate composition with a binder; and sintering the barium tantalate composition with the binder at a temperature of about 1000° C. to about 1700° C.

Abstract: An electron emissive composition comprises a barium tantalate composition in an amount of about 50 to about 95 wt %; and a ferroelectric oxide composition in an amount of about 5 to about 50 wt %, wherein the weight percents are based on the total weight of the barium tantalate composition and the ferroelectric oxide composition. A method for manufacturing an electron emissive composition comprises blending a barium tantalate composition in an amount of about 50 to about 95 wt % with a ferroelectric oxide composition in an amount of about 5 to about 50 wt % to form an electron emissive precursor composition, wherein the weight percents are based on the total weight of the barium tantalate composition and the ferroelectric oxide composition; and sintering the composition at a temperature of about 1000° C. to about 1700° C.

Abstract: An electron emissive composition comprises a barium tantalate composition of the formula (Ba1-x, Cax, Srp, Dq)6(Ta1-y, Wy, Et, Fu, Gv, Caw)2O(11±&dgr;) where &dgr; is an amount of about 0 to about −3; and wherein D is either an alkali earth metal ion or an alkaline earth ion; E, F, and G, are alkaline earth ions and/or transition metal ion; x is an amount of up to about 0.7; y is an amount of up to about 1; p and q are amounts of up to about 0.3; and t is an amount of about 0.05 to about 0.10, u is an amount of up to about 0.5, v is an amount of up to about 0.5 and w is an amount of up to about 0.25. A method for manufacturing an electron emissive composition comprises blending a barium tantalate composition with a binder; and sintering the barium tantalate composition with the binder at a temperature of about 1000° C. to about 1700° C.