Core Viewpoint - Beijing University of Science and Technology has announced procurement intentions for 40 items of scientific instruments and equipment, with a total budget of 170 million yuan, expected to be purchased between September and December 2025 [2][3]. Instrument Procurement Overview - The procurement includes various advanced instruments such as thermal constant analyzers, high-precision three-axis simulation turntables, thermal cracking simulation testing machines, and multiphase reaction smelting process detection simulation equipment [3][4][5]. Instrument Details - **Thermal Constant Analyzer**: A precision instrument based on transient plane source technology (TPS) that can simultaneously measure thermal conductivity, thermal diffusivity, and specific heat capacity of materials. It operates quickly (typically 1-640 seconds) and is unaffected by contact thermal resistance [4][11]. - **High-Precision Three-Axis Simulation Turntable**: A sophisticated testing device that integrates optics, mechanics, and electronics to achieve precise control of angular position, angular rate, and angular acceleration. It simulates the attitude angle motion of aircraft and provides standard excitation sources for dynamic performance testing of inertial components [5][11]. - **Thermal Cracking Simulation Testing Machine**: Designed to simulate the solidification process of casting, it can control cooling rates and apply loads to study the solidification characteristics under various conditions [13][18]. Budget and Procurement Timeline - The total budget for the procurement is 170 million yuan, with specific allocations for each instrument. The expected procurement period is from September to December 2025 [2][3][6]. Quality and Service Requirements - Each procurement item requires compliance with national measurement certification standards, installation, technical training, and at least five years of after-sales maintenance. The equipment must also meet safety standards for laboratory operations [8][10][20].

Core Viewpoint - The article discusses the importance of thermal conductivity measurement, its principles, methods, and applications in various industries, emphasizing its critical role in material selection and thermal management solutions [3][4]. Group 1: Definition and Importance of Thermal Conductivity - Thermal conductivity (λ or k) is a key physical parameter that measures a material's ability to transfer heat, defined by Fourier's law [3][4]. - Accurate measurement of thermal conductivity is essential for evaluating materials in modern electronics, energy systems, and building insulation, ensuring performance stability and safety [4]. Group 2: Common Measurement Methods - Thermal conductivity measurement methods are categorized into steady-state and transient methods, suitable for different material types and temperature ranges [5][6]. - Steady-state methods include: - Guarded hot plate method: High precision, suitable for insulation materials, but time-consuming [7][8]. - Heat flow meter method: Simple and cost-effective, but requires good contact interface [9][10]. - Pipe method: Suitable for cylindrical materials, but complex equipment is needed [11][12]. - Transient methods include: - Laser flash method: Fast measurement, suitable for solid materials, but requires surface treatment [13][15]. - Hot wire method: Quick and flexible for various samples, but sensitive to environmental noise [16][18]. - Thermal probe method: Non-destructive and quick, but requires careful contact management [19][20]. - Transient plane source method: Fast and versatile, but accuracy depends on contact conditions [21][22]. Group 3: Recommended Instrument Suppliers - Notable suppliers of thermal conductivity measurement instruments include: - Netzsch: Specializes in laser flash and transient plane source methods, serving metals and ceramics [24]. - Hot Disk: Focuses on heat flow meter and laser flash methods, applicable in electronics and construction [25]. - Linseis: Offers heat flow meter and transient plane source methods for polymers and ceramics [26]. - TA Instruments: Known for heat flow meter and laser flash methods, focusing on polymers and composites [28]. - Xi'an Xiaxi Electronics: Develops thermal property instruments for various industries [30]. - Xiangtan Instrument: Provides guarded hot plate and heat flow meter systems for insulation and soil research [32]. Group 4: Upcoming Industry Event - The Sixth Thermal Management Industry Conference and Exposition will take place from December 3-5, 2025, at the Shenzhen International Convention and Exhibition Center, featuring leading suppliers and the latest thermal management solutions [32][38].