High Purity Evaporation Materials in form of pieces, granules or pellets. Packed in glass vials in quantities varying from 5-25 grams. Used for thin film research, thermal evaporation and electron microscopy coatings. Heeger Materials (HM) is a leading vendor of high purity Aluminum (Al) Evaporation Material. Our evaporation materials are available in various purities ranging from 99.9% to 99.99%.