Lead-tellurium inorganic reaction systems
AssigneeHeraeus Precious Metals North America Conshohocken LLC
InventorsCuiwen Guo, Li Yan, Lei Wang
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Abstract
The invention provides an electroconductive paste comprising metallic particles, an inorganic reaction system, and an organic vehicle. The inorganic reaction system includes a lead-tellurium-magnesium composition of Formula (II): Pba—Teb—(Mgw—Cax—Sry—Baz)-Md-Oe, wherein 0<a, b, or d≤1, 0≤w, x, y, z≤1, w+x+y+z=c, at least one of w, x, y and z is greater than zero, the sum of a, b, c and d is 1, 0<c≤0.2, 0≤d≤0.5, a:b is between about 10:90 and about 90:10, (a+c+d):b is between about 10:90 and about 90:10, M is one or more elements, and e is a number sufficient to balance the Pb, Te, Mg—Ca—Sr—Ba and M components.
Claims19
An electroconductive paste comprising:
- metallic particles;
- an inorganic reaction system comprising a lead-tellurium-magnesium composition of Formula (II):
- Pba—Teb—(Mgw—Cax—Sry—Baz)-Md-Oe,
- wherein
- 0<a, b, or d≤1,
- 0≤w, x, y, z≤1,
- w+x+y+z=c,
- at least one of w, x, y and z is greater than zero,
- the sum of a, b, c and d is 1,
- 0<c≤0.2,
- 0≤d≤0.5,
- a:b is between about 10:90 and about 90:10,
- (a+c+d):b is between about 10:90 and about 90:10,
- M is one or more elements, and
- e is a number sufficient to balance the Pb, Te, Mg—Ca—Sr—Ba and M components;
- and
- an organic vehicle.
Dependencies are inferred from the claim text.