Technical Ceramics Blog — Engineering Guides for Design & Sourcing

Material comparisons, tolerance guides, and process know-how from the engineers on our production floor.

This technical ceramics blog collects the engineering guides our team writes for design engineers and buyers working with advanced ceramics — practical answers to the questions behind 500+ delivered projects. Whether you are comparing zirconia against alumina, deciding between SSiC and RBSiC grades, or checking what tolerances diamond grinding can realistically hold, each guide pairs material science with production data: real hardness and strength figures, achievable finishes like Ra 0.1μm, and the cost logic of each forming process. Use these guides to narrow your options, then ask our engineers for a recommendation specific to your application.

Featured Engineering Guides

Alumina Purity: 95% to 99.99%

How purity affects performance — and when to specify each grade.

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SSiC vs RBSiC: Choosing SiC Grades

Practical comparison of sintered vs reaction bonded silicon carbide.

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CIM: When and Why

Process overview, cost analysis, and comparison with other methods.

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Ceramic Material Properties

Density, Young's modulus, thermal conductivity, and strength data across alumina purity grades.

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Electrical Insulation & Dielectrics

Dielectric constant, insulator ceramics, substrates, washers, and spacers for electrical applications.

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Browse by Topic

Choosing a material: go deep on zirconia, alumina, silicon carbide, or silicon nitride — each page covers grades, full property tables, and typical applications.

Designing a part: the CIM guide explains when injection molding beats machining on cost at volume.

Sourcing and validation: see what a documented inspection report should contain before you accept a shipment.

Material properties: start with the alumina properties data hub, then look up density, Young's modulus, thermal conductivity, or tensile and yield strength values by purity grade.

Dielectric and insulator data: start with the alumina dielectric constant data, compare insulator ceramic materials, and choose an alumina ceramic insulator purity and shape.

Insulating parts: specify ceramic substrates, ceramic washers, or alumina spacers by purity grade and geometry.

Frequently Asked Questions

Why do alumina property values differ between suppliers' data sheets?
Most differences come from purity grade and test conditions, not from one supplier being right. Minimum density alone runs from 3.62 g/cm³ at 95% purity to 3.95 g/cm³ at 99.99%, and thermal conductivity measured at 25 °C will not match a value measured at elevated temperature. Compare grade against grade at the same test temperature. Our alumina properties data hub lists all six grades side by side.
Which alumina purity should I specify for electrical insulation?
For most high-voltage insulation, 99% alumina is the practical default, with a breakdown strength of 22.5 kV/mm. Choose 99.7% or above when low dielectric loss matters, as in RF and microwave parts, or for vacuum and high-purity duty. Breakdown strength does not rise steadily with purity, so check the grade-by-grade data in our alumina ceramic insulator guide before specifying.
Can I ask a question that isn't covered here?
Yes. Our ceramic engineers answer specific questions about materials, tolerances, processes, or applications at no charge — send your question and you will hear back within 24 hours.
Do these guides reflect real production data?
They are written by the same engineering team that runs our production lines, drawing on 500+ delivered projects — the tolerances, finishes, and process comparisons match what we actually manufacture, such as ±0.001mm grinding and Ra 0.1μm lapped finishes.

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