Combi Perfect Match 6525 Manual do Utilizador descarregar pdf (Página 7)

answer to ceramics, superconductors and other new materials

Simultaneous O/N analysis over

a wide concentration range

The unique sample flow system of the

EMGA-620W/C comes into its own

when measuring samples where there

is a sizeable difference in the concentra-

tion of the oxygen and nitrogen. The

gas generated by reduction during ther-

mal decomposition in the crucible is

transported in the carrier gas (He) down

one of two sampling lines, one for low

concentration samples and one for high,

to the infrared detector for CO detection

and the thermal conductivity detector for

N

2 detection. The sample can be

switched between sample lines for low

and high concentrations.

This unique sample flow structure

makes it possible to analyse the oxygen

and nitrogen in new materials and any

other sample simultaneously and with

high accuracy regardless of how high or

low the concentration is.

Dual sample/flux introduction

mechanism

The most commonly used method of

facilitating gas extraction from ceramic

samples is to add a flux to the crucible

in the furnace, but this poses the prob-

lem of the effect on analytical precision

by background oxygen and nitrogen in

the flux itself. HORIBA's unique dual

sample/flux introduction mechanism is a

logical device that incorporates a

sequence for low-temperature outgass-

ing of the flux in advance so that flux

background can be ignored. This also

reduces running costs since outgassing

before measurement makes it unneces-

sary to use a high purity flux.

Unique analysis programs

New materials such as superconductors

and new ceramics are being used in a

more extensive range of applications,

and the need to analyze them is of great

importance. HORIBA offers a wide range

of analytical programs for new materials

including materials that are considered

hard to analyse like silicon nitride and

boron nitride as well as oxygen analysis

in superconducting materials.

0 1000 2000 3000(;)

VERTICAL SCALE

542

500

400

300

200

100

SEC

0

Temperature-programmed analysis Nitrogen

Sample : Si3N4, TiN Nitride Mixture

Furnace control : Automatic temperature hold function

OXYGEN SIGNAL

INTEGRAL

0.0300

1.0

NITROGEN SIGNAL

INTEGRAL

0.4500

1.0

temperature

temperature

nitrogen extraction curve

T

6

1 2 3 4 5 6 7 8 9 10 11 12

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