- Materials
- Forms
- Reference Materials
-
Services
-
Services
-
-
Sectors
-
Supporting cutting edge research and development with advanced materials to your needs.
High performance materials for extreme conditions.
Innovative and lightweight materials with high mechanical properties and durability.
Materials used in chemical engineering from consumables to innovative solutions.
Advanced materials characterized by high electrical or insulation performance.
High quality materials for renewable energy.
Biocompatible and biodegradable materials to the highest standards.
High purity, biocompatible materials for high performance devices and applications.
High purity metals and alloys in various forms and crucibles suitable to your needs.
State of the art materials for the next generation of technologies.
High performance materials for extreme conditions.
Durable materials for corrosive environments.
Foils, disks or windows across a range of materials to facilitate your innovation.
Polymers, metal foils, and sustainable materials for your packaging needs.
Your requirements for unique products and attributes will be met across our 170,000+ product range and customization capabilities.
High-quality materials across branded products in various forms including rods, wires, and foils support space technology needs.
Highest quality materials to support your need for small-quantity specialist materials such as graphite and lithium compounds.
High purity materials to improve the reproducibility and reliability of your evaporation processes.
-
- Product Ranges
-
Resources
-
Find out our latest news.
Read our latest insights, and opinions.
Discover our Innovation Discovered podcasts on innovation, products, interesting topics, and more.
Find out how we've worked with our partners
Our latest updates on what we are doing, find out more.
Find out more about us and the great roles we have available for talented individuals. Find out more.
Take a look at our global distributors.
Explore our FAQ resource to help answer your key questions.
Gain a clearer picture of the language used in scientific study
-
- About Us
MACOR® Machinable Glass Ceramic Rod - Ø 3.2mm L 100mm
Details
MACOR® Machinable Glass Ceramic Rod is a fluorophlogopite mica and borosilicate glass composite that solves a fundamental problem with technical ceramics: it machines to close tolerances with standard tungsten carbide tooling, with no post-firing required. That combination of ceramic-grade electrical insulation, zero porosity, and genuine machinability is what sets MACOR® apart. It maintains continuous service temperatures up to 800 °C, carries a DC volume resistivity of 1017 Ω·cm, and delivers a dielectric strength of 45 kV/mm (AC), making it a reliable choice wherever a precision insulating component needs to perform under thermal, electrical, or vacuum load.
Custom Machining from Goodfellow
MACOR® rod can be turned, drilled, milled, and threaded, but it demands the right approach — tungsten carbide tooling, controlled spindle speeds, water-soluble coolant, and careful feed rates to avoid chipping at edges and hole exits. If you need a finished component rather than raw stock, Goodfellow's machining team can produce MACOR® parts to your drawing and specification. Submit your requirements here and we'll come back to you with a quote.
Diameter: 3.2mm
Length: 100mm
UOM Code: 036-905-47
Legacy Code: MA807904
Distributor Code: GF03690547
Tolerances
| Diameter | +20% / -10% | |
|---|---|---|
| Length | <100mm | ±1mm |
| Length | >=100mm | +5 / -1% |
Material Properties
| Element | Value |
|---|---|
| 5% HCl (Hydrochloric Acid)( mg/cm² ) | ~100 |
| 0.002 N HNO₃ (Nitric Acid)( mg/cm² ) | ~0.6 |
| NaHCO₃ (Sodium Bicarb.)( mg/cm² ) | ~0.3 |
| Na₂CO₃ (Sodium Carbonate)( mg/cm² ) | ~0.1 |
| 5% NaOH (Sodium Hydroxide)( mg/cm² ) | ~10 |
| DIN Water Class | HGB2 |
| DIN Acid Class | 4 |
| DIN Alkali Class | A3 |
| Element | Value |
|---|---|
| Dielectric constant @1 kHz | 6.01 |
| Dielectric constant @8.5 GHz | 5.64 |
| Loss Tangent @1 kHz | 0.0040 |
| Loss Tangent @8.5 GHz | 0.0025 |
| Dielectric Strength (AC)( kV/mm ) | 45 |
| Dielectric Strength (DC)( kV/mm ) | 129 |
| DC Volume Resistivity( Ω·cm ) | 10^17 |
| Element | Value |
|---|---|
| Porosity( % ) | 0 (no outgassing) |
| Tensile modulus( GPa ) | 66.9 |
| Hardness - Knoop( kgf mm⁻² ) | 250 |
| Hardness - Vickers( kgf mm⁻² ) | 400 |
| Shear modulus( GPa ) | 25.5 |
| Modulus of rupture( MPa ) | 94 |
| Compressive Strength( MPa ) | 345 (up to 900 after polishing) |
| Poisson's Ratio | 0.29 |
| Element | Value |
|---|---|
| Refractive index | 0 |
| Useful optical transmission range | 0 |
| Apparent porosity( % ) | 0 |
| Water absorption - saturation( % ) | 0 |
| Density( g/cm³ ) | 2.52 |
| Element | Value |
|---|---|
| CTE (low temp)( °C⁻¹ ) | 81 × 10−7 |
| CTE (25 °C → 300 °C)( °C⁻¹ ) | 90 × 10−7 |
| CTE (25 °C → 600 °C)( °C⁻¹ ) | 112 × 10−7 |
| CTE (25 °C → 800 °C)( °C⁻¹ ) | 123 × 10−7 |
| Specific Heat( kJ/kg·°C @25°C ) | 0.79 |
| Thermal Conductivity( W/m·°C @25°C ) | 1.46 |
| Thermal Diffusivity( m²/s @25°C ) | 7.3 × 10−7 |
| Continuous Use Temperature( °C ) | 800 |
| Maximum No-Load Temperature( °C ) | 1000 |