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A drop-on-demand ink-jet printer for combinatorial libraries and functionally graded ceramics.

Mohammad Masoud Mohebi1, Julian R G Evans

  • 1Department of Materials, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK.

Journal of Combinatorial Chemistry
|July 9, 2002
PubMed
Summary

A novel printer enables precise, computer-controlled mixing and deposition of ceramic inks for creating custom materials. This advancement supports combinatorial methods in materials science and solid freeforming.

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Area of Science:

  • Materials Science
  • Ceramic Engineering
  • Additive Manufacturing

Background:

  • Traditional methods for creating ceramic materials often lack precision in composition and spatial control.
  • Developing combinatorial libraries and functionally graded materials requires advanced fabrication techniques.

Purpose of the Study:

  • To design and build a computer-controlled printer for combinatorial ceramic libraries and functionally graded ceramics.
  • To achieve three-dimensionally programmable spatial variation in ceramic composition.

Main Methods:

  • Utilized a system with an XY table, electromagnetic valves for micromixing, and a specialized print head with a sapphire nozzle.
  • Implemented computer control for precise ink deposition and real-time mixing of multiple ceramic suspensions.

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  • Developed a method for controlled powder mixing with ejection rates as low as 1 mg/s.

    • Main Results:

    • The printer was successfully controlled, run, calibrated, and tested.
    • Demonstrated precise control over the composition and geometry of printed ceramic mixtures.
    • Enabled the preparation of combinatorial libraries and solid freeforming of functionally graded ceramics.

    Conclusions:

    • The developed printer offers precise control over ceramic material fabrication.
    • This technology advances combinatorial approaches in materials science.
    • Facilitates the creation of complex ceramic structures with tailored properties.