high purity quartz tube

The quartz glass is the good acid-proof materials; , under the high temperature, its ability sulfuric acid, the nitric acid, the hydrochloric acid, the aqua regia, the neutral salts, corrosion and so on carbon and sulfur, its chemical stability is equal to acidproof ceramics' 30 times, is equal in the berylliuim copper alloy and the ceramics 150 times, it is thermostable, bears the heat shock, the thermal-expansion coefficient is specially small, especially under high temperature chemical stability. Is other any material is unable to compare. 20°C at200°C 400°C 950°C the quartz tube's thermal conductivity 1.38w/kg.m 1.55w/kg.m 1.84w/kg.m 2.68w/kg.m Specific heat and thermal conductivity: 0---100°C 0---500°C 0---900°C the average specific heat of quartz 722 j/kg.k 964j/kg.k 1052j/kg.k ctrical Properties