玻璃窑用热电偶铂金涂层刚玉陶瓷保护管

铂金涂层热电偶保护管（platinum coated thermocouple protectiontube）

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 temperaturemeasurement in general glass furnace using wrr - 132.b. 30 - 6double platinum rhodium platinum thermocouple thermocoupleprotection:, this tube is corundum materials, long-term workingtemperature of 1600 degrees, the corundum material with a highmelting point, up to 2050 degrees, holland weight softening pointare above 1800 degrees, while the glass kiln temperature in 1350 -1600 degrees, far below the melting point and softening point, butrarely have the life of more than 3 months, is to protect thebottom of the pipe corrosion wear, we know that a type bthermocouple price to thousands of yuan, the reason is not a greatloss, but not high temperature protection tube, corundum protectivetube this material is not suitable for glass / ceramic fritenvironment, chemical composition of corundum is three two aluminumoxide, this material is very easy and glass raw materials thematerial of low melting point eutectic, we use the patentedtechnology of corundum coated platinum protection tube protectivelayer specifically to overcome the strong corrosive glass kiln andceramic frit kiln, effectively solve the problem of corundum tubethermocouple life, instead of pure platinum tube, significantlysave the cost of production.