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Product Name: Syalons Type Ceramic Thermocouple Protection Tube Si3n4 Model NO.: 16, 22, 28mm Customized: Customized Certification: CE Measuring Medium: Temperature Material: Silicon Nitride, Ceramics Production Process: Ceramics Output Signal Type: Thermocouple Protection Tube Contact: Contact Sensing Type: Thermocouple Installation Type: Duct Type Length: 200-1200mm Melting Point: 1700c Hardness: 80-90hra Usage: Protection Thermometer Trademark: no Transport Package: Wooden Case Specification: 16, 22, 28mm Origin: China HS Code: 9025900090 Product Description Syalons Type Ceramic Thermocouple Protection Tube Si3n41. IntroductionSilicon nitride thermocouple protection tube usually made by CIP (cold isostatic pressing) / RB(reaction bonded) , both are have excellent abrasion resistance and corrosion resistance , and can be used under 1400°C .2. PhysicalandchemicalindexTypesGPSNRSSNDensity>3.2g/cm3>2.4g/cm3Si3N4content>92%>92%Flexuralstrength>600Mpa>200MpaCompressivestrength>1500MpaThermalconductivity(W/mk)>22>14Porosity0<15%Thermalexpansioncoeff.(RT-1000ºC)3.22.8MaxtemperatureInair1400ºC1400ºCHardness(HRA)>92>853. Features1,Moulding:Coldisostaticpressing(CIP)2,Sintering:GPSN/RSSN3,Highstrengthandgoodcompactness4,Lowthermalexpansioncoefficient5,Excellentthermalshockresistance6,Nowettingbymoltenaluminumandnon-ferrousmetal7,Goodcorrosionresistance4. RecommendedSizesOD(mm)ID(mm)Length(mm)168300-7502212300-9002816300-12003018300-10004525300-1000Wecanalsoproduceothersizesaccordingtoyourdrawing.5. Application:Widly used in aluminium alloy casting ,non-ferrousmetal metallurgy ect.6.Packaging:Polyfoam filled,plywood box outsideand according to your requirements.7. Photos for reference.