公开(公告)号：KR1020120000303A

公开(公告)日：2012-01-02

申请号：KR1020100060604

申请日：2010-06-25

Applicant: 성균관대학교산학협력단 ,  (주)세라코

Inventor： 정승부 ,  안병욱 ,  최돈현 ,  정우현 ,  임성준 ,  박종화

IPC: B23K20/12 ,  C04B35/593 ,  C04B35/584

Abstract: PURPOSE: A tool for friction stir welding and a molding method thereof are provided to prevent the abrasion of a welding tool caused by chemical reaction to a work piece because the welding tool is made from silicon nitride sintered in a high-pressure gas atmosphere. CONSTITUTION: A tool for friction stir welding is manufactured by sintering silicon nitride powder, whose grain size is 0.3μm or less, in a high-pressure gas atmosphere. The welding tool comprises a tool body(10), a shoulder part(20) that is projected from both ends of the tool body and have a slope surface(22) inclined outward, and a fin part(30) that is projected from the center of the shoulder part to contact a welded part at the time of friction stirring.

Abstract translation: 目的：提供一种用于摩擦搅拌焊接的工具及其模制方法，以防止由于焊接工具由在高压气体气氛中烧结的氮化硅制成而导致的对工件的化学反应引起的焊接工具的磨损。 构成：通过在高压气体气氛中烧结粒径为0.3μm以下的氮化硅粉末制造摩擦搅拌焊接用工具。 焊接工具包括工具主体（10），从工具主体的两端突出并具有向外倾斜的倾斜表面（22）的肩部（20）和从该工具主体 在摩擦搅拌时，肩部的中心与焊接部分接触。

公开(公告)号：KR1020020061023A

公开(公告)日：2002-07-22

申请号：KR1020010001697

申请日：2001-01-12

Applicant: (주)세라코

Inventor： 정우현

IPC: C04B35/10 ,  C04B35/56 ,  C04B35/00

CPC classification number: C04B35/10 ,  C04B35/5611 ,  C04B2111/00844 ,  C04B2111/94

Abstract: PURPOSE: An electrical conductive ceramic composition comprising TiC(or TiB2) and sintering aids is provided for use as ionizer emitter pin. The ceramic composition has much improved abrasion-resistance, corrosion-resistance and ion generation compared with W or Si-based ionizer emitter pin. CONSTITUTION: The electrical conductive ceramic composition comprises TiC as a main component, 20-80wt.% of Al2O3, 0.5-5wt.% of Y2O3, 0-4wt.% of Co and 0-4wt.% of Ni, or TiB2 as a main component, and 0-5wt.% of Fe, Ni, Cr and Co, each. The ionizer emitter pin with 2mm diameter and 19mm length has a relative sintering density more than 98% through conventional processes such as ball-milling, granulating, forming, calcining and sintering.

Abstract translation: 目的：提供包含TiC（或TiB2）和烧结助剂的导电陶瓷组合物，用作离子发生器针脚。 与W或Si基离子发生器针相比，陶瓷组合物具有大大改善的耐磨性，耐腐蚀性和离子产生。 构成：导电陶瓷组合物包含TiC作为主要成分，20-80重量％的Al2O3，0.5-5重量％的Y2O3，0-4重量％的Co和0-4重量％的Ni，或TiB2作为 主要成分，Fe，Ni，Cr，Co为0〜5重量％。 具有2mm直径和19mm长度的电离器发射极销通过常规方法如球磨，造粒，成型，煅烧和烧结具有大于98％的相对烧结密度。

公开(公告)号：KR100403843B1

公开(公告)日：2003-11-01

申请号：KR1020010001697

申请日：2001-01-12

Applicant: (주)세라코

Inventor： 정우현

IPC: C04B35/10 ,  C04B35/56 ,  C04B35/00

Abstract: PURPOSE: An electrical conductive ceramic composition comprising TiC(or TiB2) and sintering aids is provided for use as ionizer emitter pin. The ceramic composition has much improved abrasion-resistance, corrosion-resistance and ion generation compared with W or Si-based ionizer emitter pin. CONSTITUTION: The electrical conductive ceramic composition comprises TiC as a main component, 20-80wt.% of Al2O3, 0.5-5wt.% of Y2O3, 0-4wt.% of Co and 0-4wt.% of Ni, or TiB2 as a main component, and 0-5wt.% of Fe, Ni, Cr and Co, each. The ionizer emitter pin with 2mm diameter and 19mm length has a relative sintering density more than 98% through conventional processes such as ball-milling, granulating, forming, calcining and sintering.

Abstract translation: 目的：提供包含TiC（或TiB 2）和烧结助剂的导电陶瓷组合物用作离子发生器引脚。 与W或Si基离子发生器引脚相比，陶瓷组合物具有大大改善的耐磨性，耐腐蚀性和离子产生。 构成：导电陶瓷组合物包含TiC作为主要成分，20-80重量％的Al 2 O 3，0.5-5重量％的Y 2 O 3，0-4重量％的Co和0-4重量％的Ni或TiB 2作为 主要成分，Fe，Ni，Cr，Co各0〜5重量％。 直径2mm，长度19mm的离子发生器引脚通过传统工艺（如球磨，制粒，成型，煅烧和烧结）具有超过98％的相对烧结密度。

公开(公告)号：KR1020010057296A

公开(公告)日：2001-07-04

申请号：KR1019990059707

申请日：1999-12-21

Applicant: (주)세라코

Inventor： 정우현

IPC: A01G1/06

CPC classification number: B29C45/0001 ,  C08K3/08 ,  C08K3/10 ,  C08K5/01 ,  C08K2003/0812 ,  C08L23/06 ,  C08L23/12

Abstract: PURPOSE: Provided is a production process of a ceramic pin for grafting which uses ceramics harmless to vegetation so that it reduces the destruction of vegetation tissue after grafting. CONSTITUTION: The production process of the ceramic pin for grafting is characterized by the steps of: (i) mixing alumina and zirconia-based powder in ethanol, crushing and drying; and (ii) adding polypropylene binder, polyethylene binder and paraffin wax, mixing and injection molding. The injection body is solvent-defatted in ethanol or water, defatted by hot air again and sintered to eliminate the binder added in injection molding.

Abstract translation: 目的：提供一种用于移植的陶瓷针的生产工艺，其使用陶瓷无害于植被，从而减少植入后植物组织的破坏。 构成：用于接枝的陶瓷针的生产工艺的特点是：（i）将氧化铝和氧化锆基粉末在乙醇中混合，破碎和干燥; 和（ii）加入聚丙烯粘合剂，聚乙烯粘合剂和石蜡，混合和注射成型。 注射体在乙醇或水中溶剂脱脂，再次用热空气进行脱脂并烧结，以消除在注塑中添加的粘合剂。