Customized high heat 99% al2o3 thermocouple alumina ceramic tube

Product Description

Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. Alumina ceramics is a kind of widely used ceramics, because of its superior properties, it has been more and more widely used in modern society, meeting the needs of daily use and

special properties.

95%/99%/99.7% AI203 Ceramic Material Parameters

Item Test Condition 95% AI203 99% AI203 99.7% AI203

Bulk Density (g/cm3) >3.6 3.89 3.96

Maximum Use Temp(°C) 1450 1600 1650

Water Absorption(%} 0 0 0

ROHS Hardness >85 >89 >89

Flexural Strength MPa(psiX l〇3) 20°C 358(52) 550 550

Compressive Strength MPa(psi X l〇3) 20°C 2068(300) 2600(377) 2600(377)

Fracture Toughness Mpa m’/j K(lc) 4-5 5.6 6

Thermal Expansion

Coefficient{lXi〇-6/°C)

25-1000〇 C 7.6 7.9 8.2

Thermal Conductivity

Coefficient(W/m° K}

206C 16 30.0 30.4

Thermal Shock Resistance(°C) ATc 250 200 200

Dielectricity Constant 1MHz.25〇 C 9 9.7 9.7

Dielectric Strength (ac-kV/mm)(acV/mil)

8.3(210) 8.7(220) 8.7(220)

Volume Resistivity(ohm-cm) 100°C >1013 >1014 >1014

Advantages

Alumina ceramics are the most versatile of the advanced technical ceramics.stronger than the traditional ceramics chemically inert-excellent corrosion resistance outstanding electrical insulators,even at very high temperatures extremely hard-excellent abrasion resistance are almost unaltered at 1000°C,useable up to 1700°.All alumina bodies possess very good mechanical properties such as hardness and compressive strength. They also hold up well under harsh conditions such as acid corrosion,high wear areas,and sliding abrasion. They also possess very good electrical insulation properties and have very specific thermal conductive and thermal expansion rates.

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