The development history of quartz glass
Quartz glass in abroad already 160 years of history, in 1839 Frenchman first with oxyhydrogen combustion flame Fused Quartz manufacturing quartz glass, 1902 British with graphite rods energized to obtain high temperature (called single rod manufacturing quartz glass electric melting furnace), electric melting furnace were developed in the 1940s, 1950s with the development of semiconductor technology and a new power source (in urgent need of a large number of quartz glass, quartz glass developed rapidly. Because the production technology of quartz glass is difficult, until now to mass production of quartz glass state only the United States, Germany and France, Japan, Britain, Chinese and a few other countries.
Research on China's quartz glass began in 1957, before the founding of the people's Republic is blank. 1956 countries to develop 12 year science and technology development plan, requirement of development of the urgent need for national defense and 57 key research tasks, to solve the two bombs and one satellite for new high performance materials, prepare material for the study of the atomic bomb, missile and satellite. Quartz glass is specified on the contents of the twenty-sixth and fortieth tasks in the book, the task is assigned to the comprehensive study of national building materials at the. The development of China's quartz glass can be divided into 5 stages: from 1957 to 1961 for a stage, in order to study the manufacturing process method; 1962 - 1966 for the formation of industrial stage, many military tasks completed during the period, the yield and quality of products has greatly improved, has initially formed industry; from 1978 to 1988 as the period of reform innovative, high-tech quartz glass, such as large scale integrated circuit with high purity, high temperature resistant, high purity quartz glass tube coating crucible, arc crucible, optical quartz glass, quartz glass laser are in this period of research and mass production; from 1989 to 2000, the introduction of foreign advanced technology, technology innovation increase the varieties and yield period of great development, the most prominent is the development of Donghai County as a light source production of quartz glass base, with an annual output of 6000 tons (including the quartz glass Quality products more than 2000 tons), the quality of a great increase in the cost of a few times the decline in technical equipment significantly improved. For more than 40 years, quartz glass development faster, to the production of transparent quartz glass pipe, for example: 172 tons of production in 1975, 31 factories need 60 multiple resistance furnace production, pipe quality is poor (equivalent to now the waste pipe), now two continuous smelting furnace can annual production of nearly 200 tons by the year 2000, the transparent quartz glass tube of annual output reached 7000 tons (including quality products reached 3500 tons), 25 years increased nearly 40 times.