DIELECTRIC ELEMENT AND ELECTRON EMITTER
First Claim
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1. An electron emitter comprising:
- an emitter layer formed of a dielectric layer containing, as a primary component, a composition represented by the following formula;
Pb(Mg1/3Nb2/3)aTibZrcO3 [wherein 0.2≦
a≦
0.375, 0.25≦
b≦
0.43, 0.25≦
c≦
0.375, and a+b+c=1], and having a Curie temperature Tc (°
C.) falling within a range of 60≦
Tc≦
150, the emitter layer being configured so that when a predetermined driving electric field is applied thereto in a reduced-pressure atmosphere, the emitter layer emits electrons toward the atmosphere; and
first and second electrodes provided on the emitter layer so as to apply the driving electric field to the emitter layer, the electron emitter being configured so that when the driving electric field is applied to the emitter layer through application of a predetermined drive voltage between the first electrode and the second electrode, electrons are emitted from the emitter layer toward the reduced-pressure atmosphere.
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Abstract
Provided are a dielectric element and an electron emitter exhibiting suppressed deterioration of element characteristics, which deterioration would otherwise occur with repeated use thereof. An electron emitter (i.e., a dielectric element) of the present invention is configured so as to operate through application of a predetermined driving electric field to an emitter layer. The emitter layer is formed of a dielectric layer containing, as a primary component, a PMN-PT-PZ ternary solid solution composition, and having a Curie temperature Tc (° C.) falling within a range of 60≦Tc≦150.
11 Citations
8 Claims
-
1. An electron emitter comprising:
-
an emitter layer formed of a dielectric layer containing, as a primary component, a composition represented by the following formula;
Pb(Mg1/3Nb2/3)aTibZrcO3[wherein 0.2≦
a≦
0.375, 0.25≦
b≦
0.43, 0.25≦
c≦
0.375, and a+b+c=1], and having a Curie temperature Tc (°
C.) falling within a range of 60≦
Tc≦
150, the emitter layer being configured so that when a predetermined driving electric field is applied thereto in a reduced-pressure atmosphere, the emitter layer emits electrons toward the atmosphere; andfirst and second electrodes provided on the emitter layer so as to apply the driving electric field to the emitter layer, the electron emitter being configured so that when the driving electric field is applied to the emitter layer through application of a predetermined drive voltage between the first electrode and the second electrode, electrons are emitted from the emitter layer toward the reduced-pressure atmosphere. - View Dependent Claims (2, 3, 4)
-
-
5. A dielectric element comprising a dielectric layer containing, as a primary component, a composition represented by the following formula:
-
Pb(Mg1/3Nb2/3)aTibZrcO3[wherein 0.2≦
a≦
0.375, 0.25≦
b≦
0.43, 0.25≦
c≦
0.375, and a+b+c=1], and having a Curie temperature Tc (°
C.) falling within a range of 60≦
Tc≦
150.- View Dependent Claims (6, 7, 8)
-
Specification