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GB/T 5598-2015Test method for thermal conductivity of beryllium oxide ceramics (English PDF)

氧化铍瓷导热系数测定方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 15, 2015

Implementation date

January 1, 2016

Scope

GB/T 5598-2015 is the English-translated version of 氧化铍瓷导热系数测定方法.

GB/T 5598-2015 is the Chinese standard "Test method for thermal conductivity of beryllium oxide ceramics". Its scope clause reads: This standard specifies the determination of beryllium oxide ceramic material thermal conductivity (thermal conductivity) of the club shaft and laser flashing method.

This standard specifies the method for measuring rod axis beryllium oxide ceramic temperature of the thermal conductivity in the range of 40 °C ~ 150 °C. This method can also Suitable for measuring other low thermal conductivity ceramic material or a ceramic matrix composite material thermal conductivity within the above temperature range.

Laser specified in this standard Flash method is suitable for the thermal diffusivity and thermal conductivity measurements in the range from room temperature to 1400 °C porosity of less than 10% of beryllium oxide ceramic material rate.

This method is also applicable in the above temperature range in the measurement of thermal diffusivity 10-7 m2/s ~ 10-3 m2/s between completely homogeneous , The energy pulse opaque other solid materials thermal diffusivity and thermal conductivity; suitable for measuring non-uniform or anisotropic material. Its clauses include terms and definitions.

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Document preview — GB/T 5598-2015

National Standard of the People's Republic of China

ICS: 31.030
Classification: L 90
Replacing: GB 5598-1985

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Introduction
1 Scope
2 Normative references
3 Terms and definitions
4.1 General
4.3 Principle of the laser flash method
5 club shaft Act
5.1 Test Instruments
5.2 Sample
5.3 Sample assembly
5.4 Test Procedure
5.5 Data Analysis
5.6 Test Report
6 8 the laser flash method
6.1 Principle
6.1.2 Test principle thermal diffusivity of
6.2 Measurement environment
6.3 Test Instrument
6.3.1 Thermal diffusion coefficient tester
6.3.2 pulsed laser source
6.3.3 Data acquisition and analysis means
6.3.4 Response temperature detector
6.3.5 Sample Base
6.3.6 Sample steady-state temperature measurement with a thermometer
6.3.7 Temperature control device
6.4 Sample
6.4.1 shape and size
6.4.2 Surface Treatment
6.4.3 Reference Sample
6.5 Test procedures and steps
6.5.1 Sample size measuring
6.5.2 Sample density measurements
6.5.3 Surface Treatment
6.5.5 sample temperature stability of
6.5.6 pulse heating energy
6.5.7 Temperature Measurement
6.5.8 Test data input
6.5.9 Test Record
6.6 Data Analysis
6.6.1 Calculation half the rise time of the principle of law
6.6.2 Semi-rise time range of 13 applicable law
6.7 Measurement Report
Appendix A (informative) Thermal conductivity of copper hot electrode
Annex B (informative) Principle of the laser flash method thermal diffusivity test
Annex D (informative) Additional error factors
References

1 Scope

This standard specifies the determination of beryllium oxide ceramic material thermal conductivity (thermal conductivity) of the club shaft and laser flashing method.

This standard specifies the method for measuring rod axis beryllium oxide ceramic temperature of the thermal conductivity in the range of 40 °C ~ 150 °C. This method can also

Suitable for measuring other low thermal conductivity ceramic material or a ceramic matrix composite material thermal conductivity within the above temperature range. Laser specified in this standard

Flash method is suitable for the thermal diffusivity and thermal conductivity measurements in the range from room temperature to 1400 °C porosity of less than 10% of beryllium oxide ceramic material rate. This method is also applicable in the above temperature range in the measurement of thermal diffusivity 10-7 m2/s ~ 10-3 m2/s between completely homogeneous , The energy pulse opaque other solid materials thermal diffusivity and thermal conductivity; suitable for measuring non-uniform or anisotropic material.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 2413-1980 piezoelectric ceramic material bulk density measurement method

GB/T 9530-1988 electronic ceramics Terminology

3 Terms and Definitions

GB/T 9530-1988 and defined the following terms and definitions apply to this document.

3.1 Thermal conductivity

Thermal Conductivity

Under steady-state thermal conditions, the density of heat flow rate divided by the temperature gradient. It means the unit area, the direction perpendicular to the plane of the unit temperature gradient

Steady-state rate of heat flow caused.

Note. The thermal conductivity of the material with temperature changes, and should therefore be given at the same time the average temperature measurement of thermal conductivity of the material.

3.2 Thermal diffusivity

Thermal diffusivity

Under non-steady state thermal conditions, the temperature of the physical parameters characterizing the ability to communicate. Thermal diffusivity is equal to thermal conductivity divided by the product of density and specific heat.

alpha =

Cprho (1)

Where.

alpha --- thermal diffusivity, in square meters per second (m2/s);

lambda --- thermal conductivity in watts per meter open [W/(m · K)];

CP --- specific heat units per kg of coke opening [J/(kg · K)];

p --- Density (rho = m/V, that is approximately the density p in the above temperature range to remain unchanged), in kilograms per cubic meter (kg/m3).

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 27 pages — is available in the English PDF.

Referenced standards

Cited by

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Editions of GB/T 5598

Edition	Title	Revision	Status
GB/T 5598-2015	Test method for thermal conductivity of beryllium oxide ceramics	current edition	Current
GB 5598-1985	Test method for thermal conductivity of beryllium oxide ceramics	previous edition	Superseded

This page sells the current edition, GB/T 5598-2015. Earlier editions are listed for reference only.

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