MANUFACTURING AND EQUIPMENT
USE OF LASER ANALYSER LEA S 500 FOR ANALYZING
THE CHEMICAL COMPOSITION OF MATERIALS
V. D. Kopachevskii
and M. A. Krivosheeva
Translated from Novye Ogneupory, No. 9, pp. 32 – 35, September 2007.
Original article submitted March 19, 2007.
Results are presented for analyzing the composition of various materials (both conducting and non-conduct
ing) obtained in an atomic-emission spectrometer with a laser source for spectrum excitation. The possibility
is confirmed of using a laser analyzer LEA S 500 in metallurgy and the refractory industry.
A laser atomic-emission analyzer LEA S 500 exhibits ex-
tensive analytical possibilities. The instrument combines the
newest achievements in spectroscopy, laser technology and
analytical software. Complete automation of the equipment
makes it possible to analyze the elemental composition of
metals and alloys, glasses, ceramics, plastics, compacted and
other compositions without a preliminary change in of the
sample aggregate composition. A change in laser pulse
power, area and depth of surface damage, provides the possi-
bility of carrying out analysis of the composition and thick-
ness of a coating, layer-by-layer analysis, and also analysis
of thin films, the composition of inclusions and structural
components. The locality of action of the laser source for ex
citing the spectrum at the surface of a specimen being ana
lyzed provides the possibility of obtaining additional infor
mation about the distribution of elements over a specimen
surface and through the depth (layer-by-layer).
The analyzer LEA S 500 is used in analyzing the chemi
cal composition of components for glass, ceramics, clays,
slags, ores, minerals, and different metals and alloys.
A general view of the analyzer is shown in Fig. 1. The
source for exciting spectra is a nanosecond two-pulse
Nd:YAG laser with quality factor modulation operating at a
wavelength of 1064 ìm, pulse energy 150 mJ and duration
12 nsec. As a result of the action of these pulses with specific
time kinetics for tracking at the surface of a substance condi
tions are created for forming a plasma cloud, with which
there is a reduction in its density in a surface region, the de
gree of erosion, and as a result of this there is an increase in
the intensity of spectral lines with high excitation energy.
The chamber for specimens in which spectra are excited
is convenient for operation and servicing. The choice of the
specimen zone being analyzed is accomplished by a posi-
tioning table with observation of the surface by means of an
inbuilt video system making it possible to increase the image
of the zone selected for analysis by a factor of 100 and in ad-
dition to performing its total analysis to analyze the composi-
tion of inclusions in the material being analyzed. The equipment
chamber has a special device for evacuating air (to 200 mm
of Hg), and this increases the detection sensitivity for some
elements that are readily volatile and difficult to excite.
The spectrograph, constructed according to a vertical
symmetry scheme, is a wide-aperture aberration-free system
Refractories and Industrial Ceramics Vol. 48, No. 4, 2007
1083-4877/07/4804-0255 © 2007 Springer Science+Business Media, Inc.
Belorus-Japanese Combined Enterprise CP SOLAR TII, Belorus.
Fig. 1. Laser analyzer.