Cerium Oxide Polishing Slurry – The Final Touch for MT/MPO/MTP Ferrules

Cerium oxide polishing slurry is commonly used in the final polishing stage of MT, MPO, and MTP trunk cable ferrules to achieve a mirror-quality finish with minimal scratches and excellent end-face geometry.

Here’s a complete guide to using Cerium Oxide Polishing Slurry for MT/MPO/MTP connector polishing:

Why Use Cerium Oxide Slurry?

 Typical Characteristics of Cerium Oxide Slurry

• Particle Size: 0.3 µm or 0.05 µm (very fine)

• Concentration: ~10–30 wt% solids

• pH: Neutral to slightly basic

• Color: Pale yellow or white

• Compatibility: Designed for zirconia ceramic, quartz, and glass

 How to Use Cerium Oxide Slurry for MT/MPO/MTP Ferrule Polishing

✅ 1. Preparation

• Use a final-stage polishing film, typically Flocked film (grit: 0.1–0.02 µm)

• Clean the polishing pad or film

• Shake the slurry bottle well before use to evenly disperse particles

✅ 2. Application

• Apply a small amount (a few drops) of slurry onto the polishing film

• Spread evenly across the surface using a clean lint-free cloth or by polishing motion

✅ 3. Polishing Process

• Use a polishing machine with MT/MPO jig

• Light pressure (2000–6000 g) to avoid over-polishing

• Motion: figure-8 or orbital, depending on the jig and machine

• Polishing time: 10–30 seconds

✅ 4. Cleaning & Inspection

• Rinse the ferrule endface with DI water or alcohol

• Dry with clean air or lint-free tissue

• Inspect under interferometer or microscope:

  • Check for no scratches

  • Inspect geometry: apex offset, radius, fiber height

Tips for Best Results

• Use fresh slurry—don’t reuse contaminated solution

• Store in cool, sealed containers to prevent particle agglomeration

• Avoid overusing slurry—too much may lead to build-up or streaks

• Combine with proper lapping film (Flocked Film) for optimal results

 Recommended Use Case: Final Polishing of MPO/MTP Ferrule