K. Dressel and B. Görz (2016). Microstructural Characterisation of Glass Ceramics as a Component Part of High Pressure Discharge Lamps. Practical Metallography: Vol. 53, No. 9, pp. 560-575. doi: 10.3139/147.110400 © Carl Hanser Verlag GmbH & Co. KG ISSN 0032-678X