Journal of Nuclear Science, Engineering and Technology (JONSAT)
In cooperation with the Iranian Nuclear Society

Measurement and Investigation of Effects of Coal tar Pitch Fractions in Nuclear Graphite Properties

Document Type : Research Paper

Authors

K Fatemi
S Fatoorechian
F Ahari Hashemi
Sh Ahmadi
Abstract
Coal tar pitch has a complex chemical structure. Determination of a , b , g fractions, is one of the methods to get information about its properties. In graphite fabrication it plays a role as a binder for coke particles. During the thermal treatment it carbonizes and changes to a secondary coke. This has considerable affects on the graphite properties. In this paper, determination of a , b , g and a 1 fraction in three different types of pitches have been carried out. Graphite specimens have been fabricated by using these pitches and anisotropy coke in laboratory scale. The graphite properties have been compared with the nuclear grade graphite prototype. The comparison of the results showed that the density and compression strength are appreciable while the anisotropy factor of properties is about one. The linear thermal expansion in graphite from Iranian pitch had a better result, where it stands in the nuclear range of usage. As a result, our studies showed that the graphite properties are affected by properties of pitch fractions, where it can be used as a proper sample for the graphite fabrication.

Highlights

 ش. احمدی، ”گزارش امکان‌سنجی تولید گرافیت هسته‌ای،“  مرکز پژوهشی انرژی اتمی ایران (1375).

 

2. A. P. Thrower, Chemistry and Physics of                 Carbon, 24, Marcel Dekker (1994).

 

3. A. P. Thrower, Chemistry and Physics of                         Carbon, 26, Marcel Dekker (1999).

 

4. G. Savage, “Carbon - carbon composites,”                            Chapman and Hall (1993).

 

5.   L. M. Currie, “The production and properties                           of graphite for reactor,” Proceeding of the first          united nations international conference on                                                peaceful use of atomic energy, Geneva, 8                        (1955).

 

6.  W. Delle, K. Koizlik, H. Nickel, “Graphitic materials for use in nuclear reactors,” Karl Thiemig AG, Germany (1983).

Keywords

coal tar pitch
petroleum coke
nuclear graphite
carbonization
nuclear industry
 ش. احمدی، ”گزارش امکان‌سنجی تولید گرافیت هسته‌ای،“  مرکز پژوهشی انرژی اتمی ایران (1375).
 
2. A. P. Thrower, Chemistry and Physics of                 Carbon, 24, Marcel Dekker (1994).
 
3. A. P. Thrower, Chemistry and Physics of                         Carbon, 26, Marcel Dekker (1999).
 
4. G. Savage, “Carbon - carbon composites,”                            Chapman and Hall (1993).
 
5.   L. M. Currie, “The production and properties                           of graphite for reactor,” Proceeding of the first          united nations international conference on                                                peaceful use of atomic energy, Geneva, 8                        (1955).
 
6.  W. Delle, K. Koizlik, H. Nickel, “Graphitic materials for use in nuclear reactors,” Karl Thiemig AG, Germany (1983).

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