公开(公告)号：KR20070095060A

公开(公告)日：2007-09-28

申请号：KR20060025257

申请日：2006-03-20

Applicant: KOREA ELECTRONICS TELECOMM ,  EPSILON CORP

Inventor： KWON JONG HWA ,  KIM KWANG WOOK ,  CHOI JAE ICK ,  CHOI HYUNG DO

IPC: B22F1/02

Abstract: A noble method for coating the surface of a mica powder with silver to improve corrosion resistance and electromagnetic shielding efficiency of the mica powder is provided. A method for coating a mica powder with silver comprises the steps of: degreasing and etching a mica powder; sensitizing the degreased and etched mica powder; and adding the sensitized mica powder into a solution comprising a silver compound, a complex and a stabilizer, and injecting a reductant into the mixed solution within 5 minutes, and coating the mica powder with the solution. The mica powder can be replaced with a plastic powder or a ceramic powder. The complex is ammonia water. The stabilizer is at least one selected from the group consisting of ammonium bicarbonate and ammonium carbonate. The reductant is at least one selected from the group consisting of hydrazine monohydrate, formalin, glucose, ascorbic acid, sugar-alcohol, and borohydride.

Abstract translation: 提供了用银涂覆云母粉表面的高效方法，以提高云母粉的耐腐蚀性和电磁屏蔽效率。 用银包覆云母粉的方法包括以下步骤：对云母粉进行脱脂和蚀刻; 使脱脂和蚀刻的云母粉敏感; 并将致敏云母粉末加入到包含银化合物，络合物和稳定剂的溶液中，并在5分钟内将还原剂注入混合溶液中，并用溶液涂覆云母粉末。 云母粉末可以用塑料粉末或陶瓷粉末代替。 复合体是氨水。 稳定剂是选自碳酸氢铵和碳酸铵中的至少一种。 还原剂是选自一水合肼，福尔马林，葡萄糖，抗坏血酸，糖醇和硼氢化物中的至少一种。