High-Temperature Thermal Expansion Coefficient Tester

The DIL0806A thermal expansion coefficient tester measures linear dimensional variation of solid, molten metal, powder, and coating samples as a function of temperature or time under a programmed thermal profile with near-zero load. Typical studies include linear expansion/shrinkage, glass transition, softening point, densification and sintering behavior, phase transitions, additive effects, and process optimization.

Its horizontal furnace design simplifies loading and handling, allowing non-ideal sample sizes to be placed easily into the grooved tubular holder. An optimized differential displacement sensor provides high repeatability without additional thermostatic enclosures, and a thermocouple placed close to the specimen ensures temperature measurement consistency.

The software automates calculation of linear and volumetric thermal expansion coefficients and dimensional change, applies compensation factors (with optional manual online correction), records and prints results and T–α curves with user-defined temperature step spacing, and offers Rate-Controlled Sintering (RCS) to dynamically adjust heating rate based on shrinkage rate for sintering process control.