Kyungdong One Corporation

Kyung Dong Mtec Co., Ltd.

Bum Gyu Baek

Jong Hyun Yun

Song Hee Yim

Heung Rak Sohn

Jong Hyun Yoon

Dae Woo Nam

Jun Tae Kim

Ashutosh Sharma

Jong Hyuk Yoon

Jae Pil Jung

The present disclosure relates to a lead-free solder alloy composition in which a nanosized ceramic powder additive is added to a lead-free solder alloy of Sn—Cu—Bi, Sn—Ag—Bi or Sn—Ag—Cu—Bi, and a method for preparing the same.

Lead-free solder alloy composition suitable for use in high-temperature and vibration environments and preparation method thereof

This invention relates to a lead-free solder alloy composition and a method of preparing a lead-free solder alloy, wherein the lead-free solder alloy composition includes a ceramic powder added to a lead-free solder of Sn-(0.1 to 2) wt % Cu, Sn-(0.5 to 5) wt % Ag, or Sn-(0.1 to 2) wt % Cu-(0.5 to 5) wt % Ag. According to this invention, a novel lead-free solder alloy, which functions as a replacement for a conventional lead-free solder, is provided, thus exhibiting superior spreadability, wettability, and mechanical properties than a conventional lead-free solder.

Lead-free solder alloy composition and method for preparing lead-free solder alloy

The present invention relates to a method for manufacturing a low density inorganic powder insulator having a low density molded structure using expanded perlite without a binder and a mold machine for manufacturing the same, and more particularly, to a technology of uniformly dispersing perlite particles having a shape of irregular fragments of glass using expanded perlite to form a framework among synthetic silica to improve molding strength even at a low density, thereby reducing thermal conductivity (conduction and convection blocking) due to a low density and an increase in a specific surface area. Further, the present invention relates to a method for manufacturing a low density inorganic powder insulator having a molded structure using economical expanded perlite having excellent physical properties by compression-molding a clad sheet material using a mold machine having a porous plate and a filter so as to remove pressure and air, which are generated during compression due to the use of the clad sheet material having low specific gravity and a large specific surface area, from a molded product or manufacturing the clad sheet material into a compressed clad sheet using a compression roller, and a mold machine for manufacturing the same.

Low density inorganic powder insulator using expanded perlite, method for manufacturing same and mold machine for manufacturing same

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Asan-si, South Korea

Bum Gyu Baek