MANUFACTURE OF SINTERED BRICKS OF HIGH DENSITY FROM BERYLLIUM OXIDE (in French)
Beryllium oxide bricks of nuclear purity 100 by 100 by 50 and 100 by 100 by 100 mm of very high density (between 2.85 and 3.00) were manufactured by sintering under pressure in graphite molds at temperatures between 1750 and 1850 deg C, and under a pressure of 150 kg/cm/sup 2/. The physicochemical state of the saw material is of considerable importance with regard to the success of the sintering operation. In addition, a study of the sintering of a BeO mixture, with 3 to 5% of boron introduced in the form of boric acid, boron carbide, or elementary boron showed that high densities can only be obtained by sintering under pressure. For technical reasons of manufacture, only the mixture based on boron carbide was used. The sintering was carried out in graphite molds at 1500 deg C under 150 kg/cm/sup 2/ pressure, and bricks were obtained with density between 2.85 and 2.90. Laboratory studies and the industrial manufacture of various sinters are described in detail. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-011554
- OSTI ID:
- 4084535
- Report Number(s):
- CEA-1234
- Journal Information:
- Silicates inds., Journal Name: Silicates inds. Vol. Vol: No. 2
- Country of Publication:
- France
- Language:
- French
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