ISO 8894-1:2010
Refractory materials — Determination of thermal conductivity — Part 1: Hot-wire methods (cross-array and resistance thermometer)
Refractory materials — Determination of thermal conductivity — Part 1: Hot-wire methods (cross-array and resistance thermometer)
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 19
- Дата публикации:
- 29 апреля 2010 г.
- Издание:
- ISO IS 8894 edition 2 version 1
- ICS:
- 81.080
This part of ISO 8894 describes the hot-wire methods (“cross-array” and “resistance thermometer”) for the determination of the thermal conductivity of non-carbonaceous, dielectric refractory products and materials. This methods are applicable to dense and insulating refractories (shaped products, refractory castables, plastic refractories, ramming mixes, powdered or granular materials) with thermal conductivity values less than 1,5 W/m×K (“cross-array”) and less than 15 W/m×K (“resistance thermometer”) and thermal diffusivity values less than 5 x 10-6 m2/s.
Abstract
Overview
ISO 8894-1:2010 specifies hot-wire methods for determining the thermal conductivity of non‑carbonaceous, dielectric refractory materials. It covers two dynamic test techniques - the cross-array and the resistance thermometer hot‑wire methods - applicable to dense and insulating refractories (shaped bricks, castables, plastic refractories, ramming mixes, powders/granulates). Measurements can be performed at temperatures up to 1 250 °C (subject to material service limits and dielectric behavior).
Key topics and technical requirements
- Principle: A linear hot wire embedded between two test pieces provides local heating. The temperature rise vs. time (logarithmic behavior) is recorded and used to calculate thermal conductivity.
- Methods:
- Cross‑array: temperature measured by a thermocouple welded to the hot wire at its centre; suitable for lower conductivity (λ
Технические детали
- Технический комитет
- ISO/TC 33 - Refractories
- SKU
- ISO 8894-1:2010
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