Raku-Raku®超高温石墨密封卷材在450℃时开始发生热失重（按国际标准测试，670℃状态下1小时烧失量为3.28%左右，如连续4小时的烧失量则只有9.8%以下），并且有个关键特性：超高温石墨在持续高温下的稳定性是普通石墨无法达到的。总体烧失量在后期小于0.8%，实验证明了其产品的稳定性。这是传统石墨密封无法比拟的，解决了在超高温领域的密封要求。此产品主要应用于航空航天、核工业、石化炼油、钢铁冶炼等众多超高温部位的密封。
Raku-Raku®Ultra-high Temperature Graphite Rolls
Raku-Raku®Ultra-high Temperature Graphite Roll begin to suffer thermal weight loss at 450°C (Testing by international standards,the weight loss at 670°C for 1 hour is about 3.28%,For 4 consecutive hours of weight loss is less than 9.8%),There's a key feature:The stability of ultra-high temperature graphite under continuous high temperature is not achieved by ordinary graphite.The weight loss was less than 0.8% at the later stage,The stability of the product was proved by experiments.This is incomparable to the traditional graphite seal, which solves the sealing requirements in the field of super high temperature.Mainly used in aerospace, nuclear industry, petrochemical refining, iron and steel smelting and many other ultra-high temperature sealing.
|
项目 Item |
参数Data |
|
容积密度Bullk Density (g/cm3) |
1.02 |
|
温度 Temperature (℃) |
≤670 |
|
灰分 Ash (%) |
≤2.0 |
|
碳含量 Carbon (%) |
≥98 |
|
硫含量 Sulphur (ppm) |
<750 |
|
氟含量 Fluoride (ppm) |
≤10 |
|
氯含量 Chloride (ppm) |
≤50 |
|
总卤素 Total halogen (ppm) |
≤310 |
|
抗拉强度Tensile Strength(mpa) |
4.7 |
|
压缩率 Compressibility (%) |
48.6 |
|
回弹率 Recovey (%) |
11.6 |
|
烧矢量 Oxidation rate in air at 670℃-4hr(%/hr) |
<4 |