铂金涂层热电偶保护管（Platinum coated thermocouple protection tube）

一般玻璃窑炉常规测量温度都使用WRR－132.B.铂铑30－铂铑6［双铂铑］热电偶，这种热电偶的保护管是刚玉材料，长期工作温度1600度，刚玉这种材料熔点很高，达2050度，菏重软化点也在1800度以上，而玻璃窑的温度一般在1350－－1600度，远在软化点和熔点以下，可是，几乎很少有使用寿命超过3个月的，都是保护管底蚀穿，我们知道，一支B型热电偶的价格要几千元，损失很大，原因不是保护管不耐高温，而是刚玉保护管这种材料不适合玻璃／陶瓷熔块的环境，刚玉的化学成分是三氧化二铝，这种材料很容易和玻璃原料中的低熔点物质发生低温共熔，我们这项专利技术采用刚玉保护管表面涂镀铂金保护层专门克服玻璃窑内和陶瓷熔块窑内的强腐蚀性，有效解决刚玉管热电偶的使用寿命问题，替代纯铂金护管，显著节约生产成本。

The conventional temperature measurement in general glass furnace using WRR - 132.B. 30 - 6 Double Platinum Rhodium Platinum thermocouple thermocouple protection:, this tube is corundum materials, long-term working temperature of 1600 degrees, the corundum material with a high melting point, up to 2050 degrees, Holland weight softening point are above 1800 degrees, while the glass kiln temperature in degrees, far below the melting point and softening point, but rarely have the life of more than 3 months, is to protect the bottom of the pipe corrosion wear, we know that a type B thermocouple price to thousands of yuan, the reason is not a great loss, but not high temperature protection tube, corundum protective tube this material is not suitable for glass / ceramic frit environment, chemical composition of corundum is three two aluminum oxide, this material is very easy and glass raw materials The material of low melting point eutectic, we use the patented technology of corundum coated platinum protection tube protective layer specifically to overcome the strong corrosive glass kiln and ceramic frit kiln, effectively solve the problem of corundum tube thermocouple life, instead of pure platinum tube, significantly save the cost of production.