Cupric oxide inclusions in cuprous oxide crystals grown by the floating zone method

Laszlo Frazer, Kelvin B. Chang, Kenneth R. Poeppelmeier, John B. Ketterson

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)


Phase-pure cuprous oxide (Cu2O) crystals are difficult to grow since cupric oxide can form within the crystal as the crystal is cooled to ambient conditions. Vacancies are the solute which causes precipitation of macroscopic defects. Therefore, even when a mostly phase-pure single crystal is used as a feed rod, cupric oxide inclusions persist in the recrystallized solid. Control of the thermal profile during crystal growth, however, can improve phase-purity; a slow counter-rotation rate of the feed and seed rods results in fewer inclusions. Cupric oxide can be removed by annealing, which produces a factor of 540 ±70 increase in phase-purity.

Original languageEnglish
Article number034901
Number of pages8
JournalScience and Technology of Advanced Materials
Issue number3
Publication statusPublished - 1 Jun 2015
Externally publishedYes

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