CRYSTAL-GROWTH OF SELECTED II-VI SEMICONDUCTING ALLOYS BY DIRECTIONALSOLIDIFICATION .1. GROUND-BASED EXPERIMENTS

A series of Hg0.84Zn0.16Te crystal ingots have been grown from pseudob inary melts by the Bridgman-Stockbarger type directional solidificatio n using a Marshall Space Flight Center/Space Science Laboratory heat-p ipe furnace and the ground control experiment laboratory furnace of th e crystal growth furnace which was flown on the first United States Mi crogravity Mission. A number of translation rates and a series of hot- and cold-zone temperatures were employed to assess the influence of g rowth parameters on the crystal properties for the purpose of optimizi ng the in-flight growth conditions.