First Order Raman Spectrum of Diamond at High Temperatures

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Abstract:

Measurements of the first order Raman spectrum in natural type IIa diamond for the temperature range of 293 K to 1850 K are presented. Both the stokes and anti-Stokes components are analyzed for their intensity, Raman shift, and width variation with temperature. Optical pyrometry was used to make the temperature measurements, the results of which were independently confirmed by the Stokes to anti-Stokes intensity ratios. The shift and width variations with temperature are in general agreement with the molecular dynamics simulation of C.Z. Wang, C.T. Chan, and K.M.Ho. Heating of the samples to temperatures as high as 1850 K in vacuo could be performed without any evidence of polymorphic conversion to graphite, also in agreement with previous investigations.

Author(s):
Herchen, Harald ; Cappelli, Mark A.
Author Organization(s):
STANFORD UNIV CA HIGH TEMPERATURE GASDYNAMICS LAB
Descriptive Note:
Technical rept.
Pagination:
0022

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-6
Contract/Grant Number(s):
N00014-89-J-1197
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_1.2.7_Experimentation
Modernization Areas:
Microelectronics
Communities of Interest:
Advanced Electronics
Descriptor(s):
*RAMAN SPECTRA, PYROMETERS, MEASUREMENT, OPTICAL PROPERTIES, RATIOS, TEMPERATURE, DYNAMICS, HIGH TEMPERATURE, INTENSITY, GRAPHITE, VARIATIONS, SHIFTING, WIDTH, RANGE(EXTREMES), STOKES RADIATION, MOLECULAR PROPERTIES, POLYMORPHISM, CONVERSION, SIMULATION
Field(s)/Group(s):
Inorganic Chemistry, Test Facilities, Equipment and Methods
Keyword(s):
WUNR431A022
Report Date:
1990 Dec 22