Patent obtained by Chen

1. Preparation method of stable sodium percarbonate (ZL93 1 15283.6)

2. Preparation method of high-purity ultrafine rutile titanium dioxide (ZL94 1 10679.9)

3. Preparation process of barium carbonate for electronic ceramics (ZL96 1 16009.8)

4. High-purity ultrafine electronic-grade iron oxide powder and its preparation method (ZL 0011081.0)

5. A preparation method of zinc oxide nano-powder (ZL00 129459.8)

6. Preparation method of barium titanate powder (ZL02135361.1)

7. Preparation method of M-type barium ferrite fiber (ZL0311756.2)