3.25" x 40" (82 OD x 70 ID x 1000mm L) Alumina Ceramic Tube (99.8%) High Purity - TA-80D-M1000-LD

4" OD larger diameter Alumina tube is made in the USA with high purity 99.8% ( 998) Al₂O₃ material. 998 alumina tube can be used at operating temperatures to 1800 ^oC in both oxidizing and reducing atmospheres. Tubes have been evacuated to 10^-7 Torr at room temperature. 998 alumina tube proves inert to carbon and refractory metals in many severe situations: SPECIFICATIONS

Purity	Al2O3 > 99.8%, Made in USA
Density	> 3.91 g /cm3
I.D	2.756" +/- 0.110    (70 +/- 2.79 mm)
O.D	3.25" +/- 0.04    (81 +/- 1 mm)
Length	40 " (1000 mm)
Max. working temperature	1800 oC
Warning	Please don't use alumina tube under vacuum at temperature > 1500 oC when vertically-mounted and >1400 oC when horizontally-mounted Mcdanel strongly recommends keeping ramp rate less than 100oC/ hour at 400 - 1700 oC range Please keep thermal gradient less than 100oC/ inch to avoids cracking Parts should not be placed directly onto the inside surface of a hot furnace tube increase thermal shock Please handle the tube carefully. Warranty does not include tube (but only for machine MTI provided)
Application Notes	Please click here to learn how to use and maintain Alumina tubes in MTI high-temperature tube furnace. In order to get longer tube service life, Please use quartz or alumina crucible to carry the sample, instead of loading the sample directly inside the tube, please click the picture below to choose one crucible boat: