Special Materials and Related Equipment
e. 'Precursor materials' specially designed for the "production" of materials specified in 1.C.7.c., as follows: 1. Polydiorganosilanes; 2. Polysilazanes; 3. Polycarbosilazanes;
| Reference | Parameter | Threshold |
|---|---|---|
| 1C007.a | an average particle size | < 5 μm |
1C007.aCeramic powders of titanium diboride (TiB2) (CAS 12045-63-5) having total metallic impurities, excluding intentional additions, of less than 5 000 ppm, an average particle size equal to or less than 5 μm and no more than 10 % of the particles larger than 10 μm;
1C007.bNot used;
1C007.cCeramic-"matrix""composite" materials as follows:
1C007.c.1Ceramic-ceramic "composite" materials with a glass or oxide-"matrix" and reinforced with any of the following:
1C007.c.1.aContinuous fibres made from any of the following materials:
1C007.c.1.a.1Al2O3 (CAS 1344-28-1); or
1C007.c.1.a.2Si-C-N; or
1C007.c.1.bFibres being all of the following: 1. Made from any of the following materials: a. Si-N; b. Si-C; c. Si-Al-O-N; or d. Si-O-N; and 2. Having a "specific tensile strength" exceeding 12,7 × 10^3m;
1C007.c.2Ceramic “matrix”"composite" materials, with a "matrix" formed of carbides or nitrides of silicon, zirconium or boron;
1C007.dNot used;
1C007.e‘Precursor materials’ specially designed for the "production" of materials specified in 1C007.c., as follows:
1C007.e.1Polydiorganosilanes;
1C007.e.2Polysilazanes;
1C007.e.3Polycarbosilazanes;
1C007.fNot used.
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