反应详情

A strontium nitrate solution was prepared by dissolving 0.0121 grams of strontium nitrate in 50 milliliters of a mixture of 4 parts by volume of methanol and 1 part by volume of water. Very finely-divided particles of fine silver were mixed with the solution to provide strontium in the amount of 0.01 percent by weight. The dried mixture and undoped silver were formed into compacts by pressing at 4 tons per square inch. The undoped compacts had a density of 5.28 grams/cc and the doped compacts had a density of 5.68 grams/cc. The compacts were heated to 650° C at 25° C/min and held at that temperature for 20 minutes. They were then heated to 875° C at 25° C/min and held at that temperature for 21/4 hours. The final sintered undoped pieces had a density of 8.93 grams/cc and an electrical conductivity of 89 percent IACS. The doped pieces had a density of 10.25 grams/cc and an electrical conductivity of 99.5 percent IACS. The undoped pieces had slight blistering at the surfaces and the doped pieces exhibited very slight blistering.