GB/T 22588-2008 English PDFUS$434.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 22588-2008: Determination of thermal diffusivity or thermal conductivity by the flash method Status: Valid
Basic dataStandard ID: GB/T 22588-2008 (GB/T22588-2008)Description (Translated English): Determination of thermal diffusivity or thermal conductivity by the flash method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Q40 Classification of International Standard: 81.080 Word Count Estimation: 22,281 Date of Issue: 2008-12-15 Date of Implementation: 2009-10-01 Adopted Standard: ASTM E1461-2001, IDT Regulation (derived from): National Standard Approval Announcement 2008 No.21 (Total No.134) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard applies to measure temperature in the range of 75K ~ 2800K, , thermal diffusivity in the 10-7m2/s ~ 10-3m2/s when the homogeneous isotropic solid material. This standard is more detailed than the ASTM C 714, broader applicability, including the type of material, purpose and temperature range. This method also improves the measurement accuracy. This standard applies to the energy pulse spectrum opaque material testing, also applies to the determination of the pretreated material completely or partially translucent thermal diffusivity of the sample (see Appendix A). This standard is intended to accommodate various types of equipment. Right. Standard Test Method, the provisions of all relevant equipment details and detection process is unrealistic, if the provisions of the staff will not have the technical knowledge needed to create difficulties, but also may prevent or limit the development of basic methods. GB/T 22588-2008: Determination of thermal diffusivity or thermal conductivity by the flash method---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Determination of thermal diffusivity or thermal conductivity by the flash method ICS 81.080 Q40 National Standards of People's Republic of China Flash measurement of thermal diffusivity or thermal conductivity Posted 2008-12-15 2009-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis standard is equivalent to using ASTME1461-2001 "Determination of flash method thermal diffusivity test method" (in English), which made some provision Series modifications. The main difference between this standard and ASTME1461-2001 follows. --- Reference standards ASTM standard thermocouple replaced with the corresponding national standards for our country; --- For the convenience of the user, increase the "Introduction" to indicate the measurement, calculation of thermal conductivity than the heat capacity; --- Deleting the original standard "1.8 Standard, statement and keyword Chapter 14 of the International System of Units"; --- In accordance with the provisions of GB/T 1.1-2000, the number of the Appendix and Appendix, article number made to rearrange the correspondence between the absence Any changes; --- Deleted the original standard references and bibliographies. The Standard Appendix A, Appendix B, Appendix C, Appendix D and Appendix E are informative appendices. This standard by the National Standardization Technical Committee Refractories and centralized. This standard was drafted. Wuhan University of Science and Technology. The main drafters of this standard. Ge Shan, Yin Yucheng, Zhao Huizhong, Liu Zhiqiang.IntroductionDetermination of flash thermal diffusivity test methods for the determination because of its wide range of temperature, high speed, the process can be measured in an oxidizing atmosphere, an inert Under gas or vacuum environment, it is currently widely used. Known thermal diffusivity of the material, the bulk density and the specific heat capacity, the material obtained by the following formula Thermal conductivity. Where. λ --- thermal conductivity in watts per meter Kelvin [W/(m · K)]; α --- thermal diffusivity, in units of meters per second (m2/s); p --- bulk density in kilograms per cubic meter (kg/m 3). Thermal diffusivity where material from the measured in this test method. Wherein the bulk density of various materials according to the corresponding standard assay. Wherein the material specific heat capacity can find relevant information obtained or measured by the test. This standard was determined by comparison of specific heat capacity. Comparison with the determination of specific heat capacity is known than the standard sample and the sample heat capacity together Placed in multi-sample instrument flash method thermal diffusivity, the standard sample and the sample was measured under the same conditions. Standard samples and test samples were sucked Pulse irradiation intensity received the same, according to the energy balance equation can be obtained specific heat capacity of the sample. MX · ΔTX Where. Ba ρB --- a standard sample of known specific heat capacity data, in units of coke per kilogram Kelvin [J/(kg · K)]; MB, MX --- were standard samples and the sample mass, expressed in grams (g); ΔTB, ΔTX --- respectively maximum temperature standard sample and test sample by laser irradiation, in degrees Celsius (℃). Inorganic non-metallic materials for heterogeneous, multi-phase, in order to obtain statistically significant results, reflecting the authenticity of the material, to be taken more than Samples were measured. This standard, by deleting the original standard references and bibliographies, readers such as the need to learn more about these can be found ASTME1461-2001 original standard. Flash measurement of thermal diffusivity or thermal conductivity1 Scope1.1 uniform standard suitable for measuring temperature in the range of 75K ~ 2800K, thermal diffusivity in 10-7m2/s ~ 10-3m2/s when Isotropic solid material. 1.2 This standard is more detailed than ASTMC714, broader applicability, including the type of material, purpose and temperature range. This method also provides High measurement accuracy. 1.3 This standard applies to the energy pulse spectrum opaque material testing, but also to fully or partially translucent material samples after pretreatment Determination of thermal diffusivity (see Appendix A). 1.4 This standard is intended to accommodate multiple types of devices. For standard test method, the provisions of all relevant equipment details and testing process Is unrealistic, if the provisions of the staff required would not have the technical knowledge of cause difficulties, but also may prevent or limit-based approach Research and development. 1.5 method is applicable to essentially fully dense material. However, in some cases, be applied to the porous material can be obtained relatively satisfactory the result of. Because distribution porosity, pore shape, size and porosity of the effect of thermal diffusion behavior of the material, so the data must be analyzed Attention. When should this method for measuring the thermal conductivity of the material, this standard also presents special considerations. 1.6 This method can be viewed as an absolute test method, because this method has no reference standard. Verify that the recommended standard sample With the performance of the device. 1.7 Strictly speaking, this method is only applicable to homogeneous solid material; but in some cases the results prove that the method that the specific The use of terms useful. 1.7.1 For the test composite material, when containing significant inhomogeneity and anisotropy, measured by this method of data will be Large errors. Because such data lack absolute accuracy, these data used to compare the performance of a material having the same structure is meaningful. When measuring the performance of this method of materials, for example thermal conductivity, special composite material may have prompted non-axial heat transfer mode. 1.7.2 Test liquids --- The process is particularly suitable for the determination of thermal diffusivity of molten material. When using this technique, with special needs Special containers. 1.7.3 Test --- multilayer material of the present measuring method also been extended to structural materials of different layers, wherein a layer is assumed unknown. In a Under some circumstances, it can be measured interfacial contact thermal resistance. The standard does not specify, use all safety precautions Users of this standard obligation to establish appropriate safety and health Regulations, and prior to implementation to determine their applicability.2 Normative referencesThe following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 16839.1 Thermocouples - Part 1. indexing table GB/T 16839.2 Thermocouples - Part 2. Tolerances Determination of thermal diffusivity of carbon and graphite ASTMC714 heat pulse method ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 22588-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 22588-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 22588-2008_English with my colleagues?Answer: Yes. 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