EP0195678A2
Expired / Lapsed
EP
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Diamond as a thermoluminescent material
Assignee: De Beers Industrial Diamond Division Pty Ltd
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Filing: 1986-03-20
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Granted: —
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Expires: 2006-03-20
Abstract
Abstract Diamond having a nitrogen content not exceeding 100 ppm and electrons or holes trapped at lattice imperfections within the crystal structure has been found to be a good thermoluminescent material. The diamond is produced by taking a diamond having a nitrogen content not exceeding 100 ppm and subjecting it to nuclear radiation.
Inventors
- 👤 Tom Leong Nam
- 👤 Robert Charles Burns
- 👤 Rex James Keddy
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 00:17
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/65
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
30 words
A material capable of thermoluminescence comprising diamond having a nitrogen content not exceeding 100 ppm and electrons or holes trapped at lattice imperfections within the crystal structure of the diamond.
Claim 2
Dependent Claim
30 words
A material capable of thermoluminescence comprising diamond having a nitrogen content not exceeding 100 ppm and electrons or holes trapped at lattice imperfections within the crystal structure of the diamond.
Claim 3
Dependent Claim
18 words
A material according to claim 1 wherein the diamond has a nitrogen content of less than 20 ppm.
Claim 4
Dependent Claim
22 words
A material according to claim 1 or claim 2 wherein the diamond contains boron in an amount of 0,1 to 10 ppm.
Claim 5
Dependent Claim
16 words
A material according to any one of the preceding claims wherein the diamond is synthetic diamond.
Claim 6
Independent Claim
32 words
A method of causing a material according to any one of claims 1 to 4 to luminesce including the step of subjecting that material to a temperature above ambient and below 500°C.
Claim 7
Dependent Claim
22 words
A method according to claim 5 wherein the material is subjected to a temperature in the range 200°C to 500 o C.
Claim 8
Dependent Claim
20 words
A method according to claim 5 wherein the material is subjected to a temperature in the range 250 to 400°C.
Claim 9
Independent Claim
42 words
A method according to any one of claims 5 to 7 wherein the electrons or holes trapped at lattice imperfections within the diamond crystal structure are produced by subjecting diamond having a nitrogen content of less than 100 ppm to nuclear radiation.
Claim 10
Dependent Claim
22 words
A method according to claim 8 wherein the nuclear radiation is radiation by X-rays, alpha particles, protons, neutrons, electrons or gamma rays.
Claim 11
Independent Claim
22 words
A device capable of measuring a dose of nuclear radiation comprising a diamond particle having a nitrogen content not exceeding 100 ppm.
Claim 12
Independent Claim
22 words
A device capable of measuring a dose of nuclear radiation comprising a diamond particle having a nitrogen content not exceeding 100 ppm.
Claim 13
Dependent Claim
18 words
A device according to claim 10 wherein the diamond has a nitrogen content of less than 20 ppm.
Claim 14
Dependent Claim
26 words
A device according to claim 10 or claim 11 wherein the diamond particle has a boron content in the range of 0,1 ppm to 10 ppm.
References Cited (Backward Citations)
No citation records indexed.
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