{
  "generated_at": "2026-05-14T18:16:14.142Z",
  "publisher": "Endurance Ceramics (powered by G.E. Schmidt, Inc.)",
  "publisher_url": "https://endurance-ceramics.com",
  "contact": "contact@endurance-ceramics.com",
  "copyright": "© G.E. Schmidt, Inc. All editorial, technical, and structured content on this site is copyright Endurance Ceramics, a division of G.E. Schmidt, Inc. (Cincinnati, Ohio, USA, est. 1960).",
  "license": "Text content may be cited and quoted for informational and educational use under an open-citation policy. Please attribute Endurance Ceramics and link to the source URL. See https://endurance-ceramics.com/cite for the full policy.",
  "trademark_notice": "A-132®, Cerazur®, Volcera®, DOGLAS®, DOTEX®, DOTHERM®, and DOGLIDE® are registered trademarks of Doceram GmbH (Dortmund, Germany). Endurance Ceramics is the authorized North American distributor and fabricator of components made from these materials; the trade names remain the property of Doceram GmbH.",
  "source": "https://endurance-ceramics.com/glossary",
  "count": 33,
  "terms": [
    {
      "term": "Aluminium Oxide (Al₂O₃)",
      "definition": "The most widely used advanced ceramic material, valued for extreme hardness (2000 HV for high-purity grades), high service temperature, and excellent electrical insulation. In the Endurance Ceramics portfolio, aluminium oxide is represented by A-132, an ultra-high-purity (>99.7%) grade optimized for precision manufacturing fixtures.",
      "source": "https://endurance-ceramics.com/glossary#aluminium-oxide-al-o-"
    },
    {
      "term": "A-132",
      "definition": "Doceram's ultra-high-purity aluminium oxide ceramic (>99.7% Al₂O₃). Key properties: 2000 HV hardness, 1700°C service temperature, >10¹⁷ Ω·cm electrical resistivity, 3900 MPa compressive strength. The portfolio's highest-temperature and highest-hardness material. View full A-132 specifications →",
      "source": "https://endurance-ceramics.com/glossary#a-132"
    },
    {
      "term": "Bending Strength",
      "definition": "See: Flexural Strength. The two terms are used interchangeably in ceramic engineering. Measured per ISO 6872 or similar standards as the maximum stress a material can withstand before fracture under bending load.",
      "source": "https://endurance-ceramics.com/glossary#bending-strength"
    },
    {
      "term": "Cerazur®",
      "definition": "Doceram's yttria-stabilized zirconia (Y-PSZ) ceramic. Key properties: 1300 MPa flexural strength (highest in portfolio), 12 MPa·m½ fracture toughness (highest in portfolio), Weibull modulus of 25 (best batch-to-batch consistency). Recognized by its distinctive royal blue color. View full Cerazur® specifications →",
      "source": "https://endurance-ceramics.com/glossary#cerazur-"
    },
    {
      "term": "Coefficient of Thermal Expansion (CTE)",
      "definition": "A measure of how much a material expands or contracts per degree of temperature change, expressed as × 10⁻⁶ K⁻¹. Lower CTE means less dimensional change through thermal cycling. Portfolio values: A-132 = 5.5–8.4, Cerazur® = 10.0, Volcera® 141 = 3.4 (lowest — best dimensional stability through temperature extremes).",
      "source": "https://endurance-ceramics.com/glossary#coefficient-of-thermal-expansion-cte-"
    },
    {
      "term": "Doceram GmbH",
      "definition": "German manufacturer of advanced technical ceramics headquartered in Dortmund, Germany. Doceram produces the A-132, Cerazur®, and Volcera® 141 materials distributed in North America through Endurance Ceramics (G.E. Schmidt, Inc.). Doceram ceramics are manufactured to aerospace-grade specifications with complete material certifications.",
      "source": "https://endurance-ceramics.com/glossary#doceram-gmbh"
    },
    {
      "term": "Density",
      "definition": "Mass per unit volume, measured in g/cm³. Relevant for weight calculations in robotic end-of-arm tooling and payload-sensitive applications. Portfolio values: A-132 = 3.9 g/cm³, Cerazur® = 6.0 g/cm³, Volcera® 141 = 3.2 g/cm³ (lightest in portfolio — approximately half the weight of steel).",
      "source": "https://endurance-ceramics.com/glossary#density"
    },
    {
      "term": "Electrical Resistivity",
      "definition": "A measure of how strongly a material opposes the flow of electric current, expressed in Ω·cm. Higher values indicate better electrical insulation. Portfolio values: A-132 = >10¹⁷ Ω·cm (highest — true insulation), Cerazur® = >10¹⁵ Ω·cm, Volcera® 141 = >10⁸ Ω·cm. Critical for test fixtures where signal isolation is required.",
      "source": "https://endurance-ceramics.com/glossary#electrical-resistivity"
    },
    {
      "term": "Flexural Strength",
      "definition": "The maximum stress a material can withstand before fracture under bending load, measured in MPa. Also called bending strength. Portfolio values: Cerazur® = 1300 MPa (highest), Volcera® 141 = 1000 MPa, A-132 = 390 MPa. Higher flexural strength indicates greater resistance to breakage under mechanical load.",
      "source": "https://endurance-ceramics.com/glossary#flexural-strength"
    },
    {
      "term": "Formation (Battery)",
      "definition": "The initial charging process for lithium-ion battery cells that establishes the solid electrolyte interphase (SEI) layer. Formation fixtures must be absolutely non-metallic to prevent contamination of active cell chemistry. Ceramic formation sockets eliminate metallic contamination risk while maintaining dimensional precision for consistent probe contact.",
      "source": "https://endurance-ceramics.com/glossary#formation-battery-"
    },
    {
      "term": "Fracture Toughness (KIc)",
      "definition": "A measure of a material's resistance to crack propagation, expressed in MPa·m½. Higher KIc means the material is more resistant to chipping and impact damage. Portfolio values: Cerazur® = 12 MPa·m½ (highest — best impact resistance), Volcera® 141 = 7 MPa·m½, A-132 = 5.2 MPa·m½.",
      "source": "https://endurance-ceramics.com/glossary#fracture-toughness-kic-"
    },
    {
      "term": "Hardness (Vickers, HV)",
      "definition": "A standardized measure of material hardness determined by the depth of indentation under a diamond indenter, reported as HV 0.5 (Vickers, 0.5 kg load). Portfolio values: A-132 = 2000 HV, Volcera® 141 = 1650 HV, Cerazur® = 1150 HV. For comparison, hardened tool steel is approximately 600–700 HV. See also: Vickers Hardness.",
      "source": "https://endurance-ceramics.com/glossary#hardness-vickers-hv-"
    },
    {
      "term": "ISO 2768",
      "definition": "International standard for general dimensional tolerances on machined parts. Specifies tolerance classes (fine, medium, coarse, very coarse) for linear and angular dimensions. Relevant when specifying ceramic fixture components that interface with metal parts manufactured to ISO 2768 tolerances. Doceram ceramics can be machined to tolerances tighter than ISO 2768-f (fine).",
      "source": "https://endurance-ceramics.com/glossary#iso-2768"
    },
    {
      "term": "KIc",
      "definition": "See: Fracture Toughness (KIc). The critical stress intensity factor — a standardized measure of a ceramic material's resistance to crack propagation under load.",
      "source": "https://endurance-ceramics.com/glossary#kic"
    },
    {
      "term": "Location Pin",
      "definition": "A precision fixture component used to position workpieces or tooling in a defined location. Ceramic location pins are commonly used in resistance welding (Volcera® 141 silicon nitride) and electronics assembly (A-132 alumina) where conventional steel pins wear, corrode, or cause contamination. Ceramic pins maintain dimensional accuracy through millions of cycles.",
      "source": "https://endurance-ceramics.com/glossary#location-pin"
    },
    {
      "term": "Machinable Ceramics",
      "definition": "A class of ceramic materials that can be machined using conventional cutting tools prior to final sintering. Distinguished from the high-performance sintered ceramics in the Endurance Ceramics portfolio (A-132, Cerazur®, Volcera® 141), which are fully sintered and then precision-ground to final dimensions. Machinable ceramics generally have lower hardness and wear resistance than fully sintered grades.",
      "source": "https://endurance-ceramics.com/glossary#machinable-ceramics"
    },
    {
      "term": "PSZ (Partially Stabilized Zirconia)",
      "definition": "Zirconia ceramic stabilized with yttria (Y₂O₃) to maintain a metastable tetragonal crystal structure at room temperature. This structure enables transformation toughening — a mechanism where stress-induced phase transformation absorbs crack energy, dramatically increasing fracture toughness. Cerazur® is a Y-PSZ material with 12 MPa·m½ fracture toughness.",
      "source": "https://endurance-ceramics.com/glossary#psz-partially-stabilized-zirconia-"
    },
    {
      "term": "Ra (Surface Roughness)",
      "definition": "Arithmetic average surface roughness, measured in micrometers (µm). Lower Ra values indicate smoother surfaces. Doceram ceramics can be finished to Ra 0.1 µm or better. Surface finish specification depends on the application — wafer contact surfaces, thread guides, and sealing surfaces may require different Ra values than structural components.",
      "source": "https://endurance-ceramics.com/glossary#ra-surface-roughness-"
    },
    {
      "term": "Resistance Welding",
      "definition": "A welding process that joins metals by applying pressure and passing electric current through the workpiece interface. Resistance welding fixtures are exposed to extreme thermal cycling, weld spatter, and mechanical shock. Volcera® 141 silicon nitride is the primary material recommendation for resistance welding fixtures due to its anti-stick properties, thermal shock resistance (830°C ΔT), and hardness (1650 HV).",
      "source": "https://endurance-ceramics.com/glossary#resistance-welding"
    },
    {
      "term": "Service Temperature",
      "definition": "The maximum continuous operating temperature at which a ceramic material maintains its mechanical and dimensional properties. Portfolio values: A-132 = 1700°C (highest), Cerazur® = 1000°C, Volcera® 141 = 1200°C. Note: actual maximum temperature in application may be limited by thermal shock considerations.",
      "source": "https://endurance-ceramics.com/glossary#service-temperature"
    },
    {
      "term": "Silicon Nitride (Si₃N₄)",
      "definition": "An advanced ceramic material valued for its combination of high hardness, excellent thermal shock resistance, and anti-stick surface properties. In the Endurance Ceramics portfolio, silicon nitride is represented by Volcera® 141 — a high-purity grade containing no adjuncts or polymer additives, distinguishing it from lower-grade silicon nitride materials.",
      "source": "https://endurance-ceramics.com/glossary#silicon-nitride-si-n-"
    },
    {
      "term": "Sintering",
      "definition": "The high-temperature manufacturing process that densifies ceramic powder compacts into solid components. During sintering, ceramic particles fuse together at temperatures below their melting point, achieving >99.5% theoretical density. The sintering process and parameters directly affect final material properties — Doceram's controlled sintering processes produce consistent, repeatable material properties.",
      "source": "https://endurance-ceramics.com/glossary#sintering"
    },
    {
      "term": "Spatter (Weld)",
      "definition": "Molten metal droplets expelled during welding that adhere to nearby fixture surfaces. Weld spatter bonds chemically to steel fixture surfaces, requiring frequent cleaning and causing dimensional degradation. Volcera® 141 silicon nitride has anti-stick surface properties — weld spatter does not chemically bond to the ceramic surface, maintaining clean fixture geometry.",
      "source": "https://endurance-ceramics.com/glossary#spatter-weld-"
    },
    {
      "term": "Technical Ceramics",
      "definition": "Also called engineering ceramics or advanced ceramics. Ceramic materials engineered for specific functional performance requirements (mechanical, thermal, electrical, chemical) rather than aesthetic purposes. Distinguished from traditional ceramics (pottery, tiles) by controlled composition, processing, and properties. The Endurance Ceramics portfolio — A-132, Cerazur®, Volcera® 141 — comprises technical ceramics.",
      "source": "https://endurance-ceramics.com/glossary#technical-ceramics"
    },
    {
      "term": "Thermal Conductivity",
      "definition": "A measure of how efficiently a material transfers heat, expressed in W/mK. Higher values mean better heat dissipation; lower values mean better thermal insulation. Portfolio values: A-132 = 28 W/mK (best heat dissipation), Volcera® 141 = 22 W/mK, Cerazur® = <2 W/mK (excellent thermal insulation).",
      "source": "https://endurance-ceramics.com/glossary#thermal-conductivity"
    },
    {
      "term": "Thermal Shock Resistance",
      "definition": "The maximum temperature differential (ΔT) a material can withstand without fracture from rapid temperature change. Portfolio values: Volcera® 141 = 830°C ΔT (highest — nearly twice Cerazur®), Cerazur® = 280°C ΔT, A-132 = 120°C ΔT. Critical for welding fixtures, furnace tooling, and any application with rapid temperature cycling.",
      "source": "https://endurance-ceramics.com/glossary#thermal-shock-resistance"
    },
    {
      "term": "Total Cost of Ownership (TCO)",
      "definition": "An economic analysis that considers all costs over a fixture's lifecycle: initial purchase price, installation labor, downtime during replacements, quality costs from fixture degradation, and disposal. Ceramic fixtures typically have higher initial cost but dramatically lower TCO due to extended service life, reduced maintenance, and eliminated quality costs from fixture wear.",
      "source": "https://endurance-ceramics.com/glossary#total-cost-of-ownership-tco-"
    },
    {
      "term": "Vickers Hardness",
      "definition": "See: Hardness (Vickers, HV). A standardized hardness measurement using a diamond pyramid indenter. The primary hardness scale used for technical ceramics, reported as HV followed by the test load (e.g., HV 0.5 = 0.5 kg load).",
      "source": "https://endurance-ceramics.com/glossary#vickers-hardness"
    },
    {
      "term": "Volcera® 141",
      "definition": "Doceram's high-purity silicon nitride ceramic — no adjuncts, no polymer additives. Key properties: 1650 HV hardness, 830°C ΔT thermal shock resistance (highest in portfolio), 3.4 × 10⁻⁶ K⁻¹ thermal expansion (lowest in portfolio), anti-stick surface properties. The definitive choice for resistance welding and thermal cycling applications. View full Volcera® 141 specifications →",
      "source": "https://endurance-ceramics.com/glossary#volcera-141"
    },
    {
      "term": "Wear Resistance",
      "definition": "A material's ability to resist surface removal through mechanical contact, abrasion, or erosion. Directly correlated with hardness in ceramic materials. Ceramic wear resistance is a fundamental material property — not a coating or surface treatment that degrades over time. This is the primary reason ceramic fixtures maintain dimensional accuracy through millions of cycles.",
      "source": "https://endurance-ceramics.com/glossary#wear-resistance"
    },
    {
      "term": "Y-PSZ",
      "definition": "See: PSZ (Partially Stabilized Zirconia). Yttria-stabilized partially stabilized zirconia — the specific stabilization chemistry used in Cerazur®.",
      "source": "https://endurance-ceramics.com/glossary#y-psz"
    },
    {
      "term": "Young's Modulus (E)",
      "definition": "A measure of material stiffness — the ratio of stress to strain in the elastic deformation region, expressed in GPa. Higher values indicate stiffer materials. Portfolio values: A-132 = 390 GPa, Volcera® 141 = 320 GPa (highest stiffness among non-oxide ceramics), Cerazur® = 205 GPa. For comparison, steel is approximately 200 GPa.",
      "source": "https://endurance-ceramics.com/glossary#young-s-modulus-e-"
    },
    {
      "term": "Zirconia (ZrO₂)",
      "definition": "A ceramic material based on zirconium dioxide, valued for exceptional fracture toughness and flexural strength through a transformation toughening mechanism. In the Endurance Ceramics portfolio, zirconia is represented by Cerazur®, an yttria-stabilized grade (Y-PSZ) with 1300 MPa flexural strength and 12 MPa·m½ fracture toughness.",
      "source": "https://endurance-ceramics.com/glossary#zirconia-zro-"
    }
  ]
}