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Browse Prior Art Database

Fabricating Copper Oxide Containing High Lead Solder Glasses

IP.com Disclosure Number: IPCOM000084227D
Original Publication Date: 1975-Oct-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Auchmoody, HN: AUTHOR [+2]

Abstract

This process minimizes the conversion of CuO to Cu(2)O crystals during a copper-oxide glass formation process.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 87% of the total text.

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Fabricating Copper Oxide Containing High Lead Solder Glasses

This process minimizes the conversion of CuO to Cu(2)O crystals during a copper-oxide glass formation process.

The oxide ingredients of the glass were weighed to the following weight percents: PbO 64.6 ZnO 11.9

B(2)O(3) 13.9 Bi(2)O(3) 1.5

SiO(2) 2.8 CuO 4.3

Al(2)O(3) 1.0.

All of the oxides except copper oxide are mixed together in batch form for one hour and a portion of the batch is charged to a platinum crucible. The crucible temperature is raised to 1,000 degrees C to form a liquid. The remaining portion of the batch is added little by little until the entire batch is in solution.

The melt temperature is slowly raised to about 1,100 degrees C + 20 degrees
C. The melt is then heated at a temperature of 1,100 degrees C + 20 degrees C for a minimum of 1 hour and a maximum of 1-1/4 hours. The melt temperature is then reduced to 750 + /-20 degrees C and the copper oxide is added little by little to the melt, with the melt temperature being maintained at about 750 degrees C.

After the addition of the copper oxide has been completed, the melt is heated at 750 + /-20 degrees C for a minimum of 3 hours and a maximum of 3-1/2 hours. The melt is then poured into aluminum molds from a melt temperature of 750 +/- 20 degrees C and slowly cooled to room temperature from the anneal temperature of 351 degrees C.

In the alternative, billets are drawn directly from the melt at the melt temperature and allowed to cool s...