Claims
- 1. A pyroelectric ceramic suitable for use as an infra-red detecting element, the pyroelectric ceramic having the composition: ##EQU5## where .phi. is U (uranium) or Mn (Manganese) or a combination of U or Mn and in which .alpha. is a number within the range 0.01 to 0.10; x is a number within the range 0.10 to 0.25; y is a number within the range 0 to 0.4; z is a number within the range 0 to 0.05 and .delta. is a number within the range 0 to 0.06 and exhibiting a higher pyroelectric coefficient and a lower Curie temperature than said ceramic absent Sr.
- 2. An infra-red detecting element comprising a pyroelectric ceramic having the composition according to claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8506805 |
Mar 1985 |
GBX |
|
Parent Case Info
This is a continuation of application Ser. No. 839,008 filed Mar. 12, 1986 now abandoned.
US Referenced Citations (3)
Foreign Referenced Citations (1)
Number |
Date |
Country |
48-6360 |
Feb 1973 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
839008 |
Mar 1986 |
|