## 206 ABSTRACTS magnetique et la creation de sequences rhombotdriques. Ces rtsultats conduisent a une valeur de la susceptibilitt magnttique de la varittt rhombotdrique en bon accord avec la valeur theorique proposee par McClure (Ir; = -11,7.106 u.e.m. C.G.S.). Cette etude a ete complette par la
Contact potential difference of phenol-formaldehyde resin carbons
✍ Scribed by H. Honda; Y. Sanada; T. Furuta
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- English
- Weight
- 148 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0008-6223
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An X-ray diffraction study of the carbons which were prepared from phenolformaldehyde resin, 3-methylphenol-formaldehyde resin and 3 \* 54imethylphenol-formaldehyde resin all heat treated in the temperature range from 900 to 3000°C was carried out in order to find the relation between the graphitiza
Phenol formaldehyde precursors in the form of powder and I mm thick platelets were carbonized in flowing nitrogen up to 1000°C with a heating rate of 2O"/h. Evolution of carbonization products is different for the bulk and powdered samples. The observed differences are caused by secondary reactions