1C007 Category 1C
Ceramic powders, ceramic “matrix” “composite” materials and 'precursor materials,' as follows (see List of Items Controlled).
Category 1: Special Materials and Related Equipment, Chemicals, “Microorganisms,” and “Toxins”
Reasons for control
- NS: National security
- MT: Missile technology
- AT: Anti-terrorism
Country chart
| Control | Column |
|---|---|
| AT applies to entire entry | AT 1 |
| MT applies to items in 1C007.c when the dielectric constant is less than 6 at any frequency from 100 MHz to 100 GHz for use in “missile” radomes | MT 1 |
| NS applies to entire entry | NS 2 |
List-based license exceptions
Items
- Items: a. Ceramic 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;
- b. [Reserved]
- c. Ceramic “matrix” “composite” materials as follows:
- c.1. Ceramic-ceramic “composite” materials with a glass or oxide-“matrix” and reinforced with any of the following:
- c.1.a. Continuous fibers made from any of the following materials:
- c.1.a.1. Al2O3 (CAS 1344-28-1); or
- c.1.a.2. Si-C-N; or
- c.1.b. Fibers being all of the following:
- c.1.b.1. Made from any of the following materials:
- c.1.b.1.a. Si-N;
- c.1.b.1.b. Si-C;
- c.1.b.1.c. Si-Al-O-N; or
- c.1.b.1.d. Si-O-N; and
- c.1.b.2. Having a “specific tensile strength” exceeding 12.7 × 10 3 m;
- c.2. Ceramic “matrix” “composite” materials with a “matrix” formed of carbides or nitrides of silicon, zirconium or boron;
- d. [Reserved]
- e. 'Precursor materials' “specially designed” for the “production” of materials controlled by 1C007.c, as follows:
- e.1. Polydiorganosilanes;
- e.2. Polysilazanes;
- e.3. Polycarbosilazanes;
- f. [Reserved]
Related controls
See also 1C107
Notes
Note: 1C007.c.1.a does not apply to “composites” containing fibers with a tensile strength of less than 700 MPa at 1,273 K (1,000 °C) or tensile creep resistance of more than 1% creep strain at 100 MPa load and 1,273 K (1,000 °C) for 100 hours.
N.B.: For items previously specified by 1C007.c see 1C007.c.1.b.
N.B.: For items previously specified by 1C007.d see 1C007.c.2.
Technical Note: For the purposes of 1C007, 'precursor materials' are special purpose polymeric or metallo-organic materials used for the “production” of silicon carbide, silicon nitride, or ceramics with silicon, carbon and nitrogen.
N.B.: For items previously specified by 1C007.f see 1C007.c.1.a.
Source: eCFR, version
2026-08-01, retrieved
2026-08-20T04:04:59+00:00.