Xiatech DIL1000 Benchtop Thermal Dilatometer

Overview

The Xiatech DIL1000 is a high-precision benchtop thermal dilatometer engineered for quantitative measurement of linear dimensional changes in solid materials as a function of temperature. It operates on the principle of contact-based pushrod dilatometry: a calibrated quartz or ceramic pushrod transmits axial displacement from a vertically oriented sample to a high-stability linear variable differential transformer (LVDT) sensor. The instrument maintains precise thermal control via a resistively heated furnace with dual-zone PID regulation, enabling stable ramping and isothermal holds across its full operating range (ambient to 600 °C). Designed specifically for laboratories requiring traceable, reproducible thermal expansion data—especially for low-expansion materials such as fused silica, Invar alloys, or advanced ceramics—the DIL1000 delivers sub-0.1% full-scale resolution without compromising mechanical integrity of fragile specimens.

Key Features

• High-resolution LVDT displacement sensing: Integrated low-noise LVDT with signal conditioning achieves < 0.1% full-scale resolution, enabling detection of sub-micrometer expansions in samples up to 50 mm in length.
• Adjustable contact force mechanism: A spring-loaded, manually tunable loading system allows operators to set optimal probe contact pressure (typically 0.05–0.3 N), minimizing creep-induced artifacts and preventing deformation of soft polymers or sintered ceramics during measurement.
• Thermal stability architecture: Dual-zone furnace design with independent top/bottom heating elements ensures uniform axial temperature distribution (< 0.5 K gradient over 30 mm sample height) and minimizes thermal lag during dynamic heating cycles.
• Robust calibration traceability: Factory-calibrated against NIST-traceable standards; includes reference material verification protocols for α-Al₂O₃ and Cu to support internal quality assurance workflows.
• Low-maintenance mechanical design: All-ceramic pushrod assembly and hardened stainless steel sample holder eliminate thermal drift from metal expansion mismatches; no lubrication or periodic alignment required.

Sample Compatibility & Compliance

The DIL1000 accommodates cylindrical or rectangular solid specimens with lengths between 20 and 50 mm and diameters (or cross-sections) from 3 to 10 mm. Compatible material classes include metallic alloys (e.g., stainless steels, Ni-based superalloys), oxide and non-oxide ceramics (Al₂O₃, SiC, ZrO₂), glasses (soda-lime, borosilicate), thermoplastics and thermosets (PMMA, epoxy, PEEK), cementitious composites, and graphite-based refractories. Measurements are performed under ambient air atmosphere, suitable for non-oxidizing or moderately oxidizing conditions. The system complies with ASTM E228 “Standard Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer” and Chinese national standard GB/T 4339 “Metallic Materials — Determination of Linear Thermal Expansion Coefficient.” Data output formats support audit-ready reporting for GLP environments.

Software & Data Management

Control and analysis are executed via Xiatech’s proprietary DilSoft v3.2 software, running on Windows 10/11 platforms. The interface supports real-time visualization of displacement vs. temperature curves, automatic calculation of mean and instantaneous coefficients of linear expansion (CTE), inflection point detection for phase transition identification, and multi-cycle comparative analysis. Raw data export is available in CSV and ASCII formats; metadata—including operator ID, calibration certificate number, atmospheric conditions, and furnace thermocouple readings—is embedded in each dataset. Software features audit trail logging compliant with FDA 21 CFR Part 11 requirements when configured with user authentication and electronic signature modules.

Applications

• Determination of CTE for qualification of thermal interface materials in electronics packaging
• Characterization of sintering shrinkage behavior in powder metallurgy and ceramic green bodies
• Validation of thermal mismatch predictions in multilayer ceramic capacitor (MLCC) stack design
• Assessment of dimensional stability in aerospace-grade polymer composites under thermal cycling
• Quality control testing of architectural glass and fire-rated glazing systems per EN 14190
• Research into martensitic transformation temperatures in shape-memory alloys

FAQ

What is the maximum recommended heating rate for reliable CTE calculation?
The DIL1000 is validated for heating rates up to 10 K/min; for high-accuracy CTE determination—particularly near phase transitions—a rate of 2–5 K/min is recommended to ensure thermal equilibrium throughout the sample volume.
Can the instrument operate under inert or reducing atmospheres?
No—the DIL1000 is configured exclusively for ambient air operation. For controlled-atmosphere dilatometry (e.g., N₂, Ar, H₂/Ar), users should consider Xiatech’s DIL2000 series with sealed furnace and gas inlet manifold.
Is third-party calibration certification available?
Yes—Xiatech provides optional UKAS-accredited calibration certificates (ISO/IEC 17025) upon request, covering displacement sensor linearity, furnace temperature uniformity, and CTE measurement uncertainty budgets.
How is probe wear monitored and compensated?
The software includes a probe tip wear compensation routine that uses pre- and post-run baseline measurements on a reference sapphire rod to correct for cumulative mechanical wear over extended operational life.
Does the system support automated sample changers?
Not natively—the DIL1000 is a single-sample manual-load platform. High-throughput labs requiring unattended operation should evaluate the DIL3000 automated dilatometer series with robotic sample handling and integrated weighing module.