BS EN ISO 13078-3-2023 PDF

Full title and description

STB BS EN ISO 13078-3:2023 — Dentistry. Dental furnace — Part 3: Test method for the evaluation of high temperature sintering furnace measurement with a separate thermocouple. This British/European adoption of ISO 13078-3:2023 specifies a repeatable calibration and test method for resistance‑heated high‑temperature sintering furnaces used for oxide ceramics and sintered metals (e.g., zirconia) up to 1 700 °C, using an externally mounted separate thermocouple to assess furnace measurement accuracy and repeatability.

Abstract

ISO 13078-3:2023 defines procedures, test cycles and reporting requirements to evaluate and, where necessary, adjust the temperature measurement and control of high‑temperature dental sintering furnaces. It is complementary to ISO 13078:2013 (which covers silica‑based ceramics at lower temperatures) and focuses on furnaces intended for sintering oxide ceramics and sintered metals in the range up to 1 700 °C. The method includes specified thermocouple types and placement, fixture requirements, recording times during holds, acceptance criteria and required test report contents.

General information

• Status: Published / Current (BS EN ISO adoption active).
• Publication date: ISO edition published 2023 (ISO record: May 2023); BS EN ISO adoption published June 14, 2023.
• Publisher: International Organization for Standardization (ISO); published as BS EN ISO 13078-3:2023 by BSI (British Standards Institution) / EN adoption.
• ICS / categories: 11.060.01 (Dentistry in general) — dentistry / dental equipment / prosthodontic materials.
• Edition / version: Edition 1 (2023).
• Number of pages: National/adopted documents typically 15–17 pages (BS/EN PDF listings show 16 pages); ISO core entry summary notes differ by publication format.

Scope

This part of ISO 13078 specifies a test method for the calibration and evaluation of resistance‑heated high‑temperature dental sintering furnaces intended for sintering oxide ceramics and sintered metals at temperatures up to 1 700 °C. It is intended to ensure accurate measurement and repeatable sintering conditions affecting mechanical properties, colour and dimensional fit of restorations. It does not replace ISO 13078:2013 (which addresses silica‑based ceramics in the 600–1 050 °C range).

Key topics and requirements

• Thermocouple type and accuracy: use of a separate external thermocouple (examples: Pt10Rh–Pt type S, Pt13Rh–Pt type R acceptable alternatives) and appropriate class/tolerance per IEC 60584 series.
• Thermocouple fixture and placement: lightweight, high‑temperature resistant fixture to position the sensor reproducibly, with specified height and central placement above object level.
• Compensating cable and indicator: use of appropriate extension/compensating cable class and a calibrated indicator with specified accuracy across the test temperature range.
• Prescribed test cycle: defined test temperatures (examples: 1 000 °C and 1 500 °C), minimum heating rate (e.g., ≥10 °C/min), holding time (e.g., 10 min) and specific recording instants during hold (e.g., 0 s, 15 s, 60 s, 120 s, 600 s) for repeatable measurement.
• Acceptance and adjustment criteria: calculation of maximum and mean deviations from setpoint; criteria for permissible deviation and procedures for adjustment and retest (example threshold commonly cited: if deviation exceeds ~10 °C, adjust control electronics and repeat test).
• Reporting: required test report items include furnace model/serial, test device identification, setpoint vs actual data, largest and mean deviations, corrective actions and final assessment of conformity.

Typical use and users

Primary users include dental laboratories, dental furnace manufacturers, service and maintenance technicians, calibration laboratories and quality managers in dental prosthetics production. The standard is used to verify and document furnace temperature control and repeatability for high‑temperature sintering processes (e.g., zirconia restorations), to reduce rework and ensure predictable clinical fit and material properties.

Related standards

Key related documents include ISO 13078:2013 (Dentistry — Dental furnace — Test method for temperature measurement with separate thermocouple) which covers silica‑based ceramics and lower temperature ranges, and relevant thermocouple standards in the IEC 60584 series (reference tables, tolerances, extension/compensating cables). National/adopted versions include EN ISO and national publications (BS EN ISO 13078-3:2023, DIN/UNE adoptions).

Keywords

Dental furnace, sintering furnace, calibration, thermocouple, high temperature, zirconia, oxide ceramics, temperature measurement, dental laboratory, ISO 13078-3, BS EN ISO 13078-3:2023.

FAQ

Q: What is this standard?

A: ISO 13078-3:2023 (published and adopted as BS EN ISO 13078-3:2023) is an international test method that specifies how to evaluate and calibrate resistance‑heated high‑temperature dental sintering furnaces using a separate thermocouple.

Q: What does it cover?

A: It covers test set‑up, thermocouple type and placement, fixture requirements, prescribed test cycles and recording times, acceptance criteria for deviations between setpoint and measured temperature, adjustment procedures and the required test report content for furnaces used up to about 1 700 °C.

Q: Who typically uses it?

A: Dental laboratories, manufacturers of dental sintering furnaces, calibration and service technicians, and quality managers responsible for prosthetic production and process validation.

Q: Is it current or superseded?

A: This is the current published part for high‑temperature furnace evaluation (edition 1, 2023). It complements and does not supersede ISO 13078:2013, which remains relevant for silica‑based ceramics at lower temperatures. Users should confirm national adoption status and any local amendments.

Q: Is it part of a series?

A: Yes — ISO 13078 is the family of standards for dental furnace temperature measurement/calibration; the 2013 document addresses lower temperature silica‑based ceramic furnaces and ISO 13078-3:2023 extends the methodology to high‑temperature sintering furnaces for oxide ceramics and sintered metals.

Q: What are the key keywords?

A: Dental furnace, sintering, thermocouple, calibration, high temperature, zirconia, measurement accuracy, ISO 13078-3.