Beijing Sinoma Synthetic Crystals Co., Ltd., supported by the Ministry of Science and Technology, has researched on silicon nitride ceramics since 1978, and is the pioneer enterprise of its kind in China. It has taken on more than 30 projects, including the Key National Scientific and Technological Research,*?63**igh Technology Project, Supporting Military Project , nnovation Fund of Ministry of Science and Technology, Torch Project and the Major Industrial Engine Project of Beijing . And three state-level awards, 18 patents for invention were awarded . Two national standards and one military standard on silicon nitride ceramics were developed by us . Beijing Sinoma has established a silicon nitride production line which has the largest capacity and the most advanced technology in China , and which can produce 35 million silicon nitride bearing balls and 10 ton ceramics annually.