兰州大学磁性材料研究所研制成功的热等静压(HIP)铁氧体材料,以及用这种材料制作的立体声盒式磁带快速复制机铁氧体磁头,最近在兰州通过了鉴定。填补了我国在这方面的两项空白。这次鉴定会由甘肃省高教局主持,来自全国各地的高等院校、科研机构、专业工厂等17个单位的教授、副教授、高级工程师等专家、同行对这两项成果进行了评论。一致认为根据不同用途研制的四种材料的抗折强度及显微硬度优 The successful development of HIP ferrite materials from Lanzhou University’s Institute of Magnetic Materials and the use of stereo cassette tape duplicator ferrite heads made with this material were recently identified in Lanzhou. This has filled two gaps in our country in this regard. The appraisal will be presided over by the Higher Education Bureau of Gansu Province, professors, associate professors, senior engineers and other experts from 17 units of institutions of higher learning, research institutes and professional factories all over the country and colleagues commented on these two achievements. It is agreed that the four kinds of materials developed according to different uses have good flexural strength and microhardness