Abstract
The need to reduce metal content, especially Palladium content in the multi layer ceramic components is driven by two motives. The first is the need to reduce material costs which has become a major issue due to the sharp rise and instability of palladium price. The second motive is the need to build components with ever‐growing number of layers, in order to achieve better performance.In this paper, a series of new metal powders, which were developed by NanoPowders Industries (NPI), will be discussed. These powders vary in composition, from pure silver, to silver–palladium, silver–platinum and silver–gold alloys. These powders are of very fine particle size. They open a broad working window for MLC design.The different properties of the powders will be discussed in this paper, including melting and sintering behavior.
Highlights
In the last 4 years, prices of palladium reached new heights and were generally unstable and hard to predict
The lower the sintering temperature, the lower the palladium content required in the powder and the cost is lower
By changing the metals and the composition we can cover a wide range of properties, which open for the component designer and producer a wide window of opportunities, including the possibility to change from palladium to platinum or gold and in this manner overcome the price instability and keep costs stable and low
Summary
In the last 4 years, prices of palladium reached new heights and were generally unstable and hard to predict (see Fig. 1). The new generation of capacitors will use 5% palladium only, with a sintering temperature of about 940 C., compared with 1100–1200 C [2] for a 100% palladium electrode Parallel to this trend big efforts are been made to decrease the particle size of the powder from 1–2 mm to less than 0.5 mm. By changing the metals and the composition we can cover a wide range of properties, which open for the component designer and producer a wide window of opportunities, including the possibility to change from palladium to platinum or gold and in this manner overcome the price instability and keep costs stable and low (see Fig. 1). We will show that these powders have excellent performances in both NPO and X7R capacitors and may replace the common silver=palladium powders in the new generation of low fire systems
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