Metallic glass, conductive paste, and electronic device

1. A metallic glass, comprising:

aluminum (Al);

a first element group including a transition metal and a rare earth element, the transition metal being at least one of nickel and cobalt, and the rare earth element being yttrium; and

a second element group including at least one of an alkaline metal, an alkaline-earth metal, a semi-metal, and a non-metal,

the second element group having an electronegativity difference from the aluminum of greater than or equal to about 0.25,

the second element group is included in an amount of less than or equal to about 3 at % based on a total amount of the aluminum (Al), the first element group, and the second element group,

wherein the metallic glass is represented by the following Chemical Formula 1,

Al a TM b RE c X d   [Chemical Formula 1]

wherein, in the above Chemical Formula 1,

Al is aluminum,

TM is at least one of nickel and cobalt,

RE is yttrium,

X is the second element group,

50<a≦99, 0≦b≦30, 0≦c≦30, 0<d≦3, and

a+b+c+d=100,

wherein the second element group includes at least one of lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), carbon (C), germanium (Ge), nitrogen (N), phosphorus (P), arsenic (As), and antimony (Sb).

2. The metallic glass of claim 1 , wherein 80≦a≦85, 5≦b≦8, and 4≦c≦10.

3. A metallic glass, comprising:

aluminum (Al);

a first element group including at least one of a transition metal and a rare earth element; and

a second element group including at least one of an alkaline metal, an alkaline-earth metal, a semi-metal, and a non-metal,

the second element group having an electronegativity difference from the aluminum of greater than or equal to about 0.25,

the second element group is included in an amount of less than or equal to about 3 at % based on a total amount of the aluminum (Al), the first element group, and the second element group,

wherein the metallic glass is one of Al 85 Ni 5 Y 6 Co 2 Li 2 , Al 85 Ni 5 Y 5 Co 2 Ca 2 , Al 83 Ni 5.5 Y 10 Si 1.5 , Al 84 Ni 5 Y 6 Co 2 Ca 2 N 1 , and Al 83 Ni 5.5 Y 6 Co 2 La 2 Si 1.5 .

4. The metallic glass of claim 1 , wherein the metallic glass has a brittle property such that the metallic glass forms a surface crack during a Vickers indentation test.

5. The metallic glass of claim 1 wherein

the metallic glass is in the form of particles, and

a particle size distribution of the metallic glass is D 50 ≦5 μm.

6. The metallic glass of claim 1 , wherein

the metallic glass is in the form of particles, and

a particle size of the metallic glass is less than about 5 μm in at least about 20% of the particles of the metallic glass.

7. The metallic glass of claim 1 , wherein an electronegativity difference between the second element group and the aluminum is about 0.29 to about 1.43.

8. A conductive paste, comprising

a conductive powder, the metallic glass of claim 1 , and an organic vehicle.

9. A conductive paste comprising

a conductive powder, the metallic glass of claim 3 , and an organic vehicle.

10. The conductive paste of claim 8 , wherein at least part of the metallic glass is a powder.

11. The conductive paste of claim 10 , wherein an average particle size of the powder in the metallic glass is less than or equal to about 5 μm.

12. The conductive paste of claim 8 , wherein the conductive powder includes one of aluminum (Al), silver (Ag), copper (Cu), nickel (Ni), an alloy thereof, and a combination thereof.

13. The conductive paste of claim 8 , wherein the conductive powder, the metallic glass, and the organic vehicle are included in respective amounts of about 30 to about 99 wt %, about 0.1 to about 20 wt %, and a balance amount based on a total weight of the conductive paste.