Hunan Zhenhua Blog

Technical notes, application guidance, standards commentary, and company updates for thermal and materials testing laboratories.

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Technical NoteDecember 15, 2017

WQY Thermal Bimetal Bending Test System

The WQY thermal bimetal bending test system is designed in accordance with GB/T 8364-2008, Method for Measuring the Bending Constant of Thermal Bimetal. It measures relative bending, thermo-curvature,...

2 min readRead article
Technical NoteDecember 15, 2017

Thermo-Bimetal Bending Tester for Shanghai Songsun Special Metals Successfully Accepted

On October 26, 2016, we signed a purchase contract with Shanghai Songsun Special Metals Co., Ltd. for a thermo-bimetal bending tester, model WQY. After completing manufacturing and commissioning, the ...

1 min readRead article
Technical NoteOctober 16, 2017

Principles of Freeze Drying in Lyophilizers

Freeze drying removes water from high‑moisture materials by first freezing them into a solid state and then, under vacuum, allowing the ice to sublimate directly into vapor. Because the solid matrix i...

4 min readRead article
Technical NoteAugust 29, 2017

CRRC High-Temperature Anti-Oxidation Test Furnace Project Passes Final Acceptance

On November 27, 2016, Hunan Zhenhua Analytical Instruments Co., Ltd. signed a procurement contract with CRRC Qishuyan Institute of Locomotive and Rolling Stock Technology for a GYH-A high-temperature ...

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Technical NoteApril 6, 2017

Measuring Glass CTE, Glass Transition, and Softening Point with a Horizontal Push-Rod Dilatometer

Thermal expansion coefficient (CTE), glass transition temperature, and softening point are key parameters that define the performance of glass materials. A push-rod dilatometer provides a straightforw...

3 min readRead article
Technical NoteMarch 2, 2017

Bending Resonance Method for Damping Properties of Acoustic Materials (GB/T 16406-1996)

This standard specifies a bending resonance method for evaluating the damping properties of acoustic materials. It is aligned with internationally recognized methodologies to ensure comparability and ...

1 min readRead article
Technical NoteDecember 12, 2016

DIL 0809 PC Series Coefficient of Thermal Expansion (CTE) Analyzers

The DIL 0809 PC series measures dimensional change of a sample as a function of temperature or time under a programmed thermal profile with near-zero applied load. It is suitable for solids, molten me...

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Technical NoteNovember 3, 2016

DIL 0809 PC High-Precision Dilatometer

The DIL 0809 PC high-precision dilatometer integrates multiple performance advantages in a compact, refined form factor compared with the earlier PCY model. It is simple to operate, offers a wide appl...

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Technical NoteMarch 24, 2015

Critical Temperature and Continuous Cooling Curve Analyzer: Principles, Specifications, and Operating Guide

Overview This transformation analyzer uses the dilatometry method to determine thermal expansion coefficients, critical (softening) temperatures, and phase transformations of metals, ceramics, refract...

9 min readRead article
Technical NoteMarch 20, 2015

Guarded Hot Plate Thermal Conductivity Tester: User Manual and Specifications

Overview Thermal conductivity is a key parameter for characterizing material physical properties. Industries such as aerospace, nuclear energy, construction, and non-metallic materials require predict...

6 min readRead article
Technical NoteOctober 31, 2014

Thermal Conductivity Tester: Applications and Technical Specifications

A thermal conductivity tester measures the thermal conductivity of materials such as plastics, glass, fibers, and foams. Typical users include materials testing laboratories, research institutes, fact...

2 min readRead article
Technical NoteOctober 31, 2014

High-Temperature Specific Heat Capacity Tester for Solid Materials: Specifications and Applications

This article introduces a high-temperature specific heat capacity tester for solid materials and outlines its key specifications and application scope. Main technical specifications: - Temperature ran...

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Technical NoteMarch 20, 2013

GB/T 4339-84: Methods for Determining Thermal Expansion Parameters of Metallic Materials

This article outlines the standard GB/T 4339-84, which specifies methods for determining the thermal expansion characteristics of metallic materials. Thermal expansion parameters, such as the linear t...

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Technical NoteMarch 20, 2013

Test Method for Tensile Strength of Domestic Ceramics (GB/T 4966-1985)

This article references the Chinese national standard GB/T 4966-1985, which specifies the test method for determining the tensile strength of domestic-use ceramics. While the original source provides ...

1 min readRead article
Technical NoteNovember 24, 2012

Hot-Wire Method Thermal Conductivity Analyzer

The DRX-I-RX thermal conductivity analyzer uses the hot-wire method to measure the thermal conductivity of refractory insulation products and granular or powdered materials. It supports both cross and...

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Technical NoteNovember 24, 2012

Guarded Hot Plate Method for Thermal Conductivity Tester (DRX-I-PB)

This note summarizes the key specifications and applicable standards for the DRX-I-PB thermal conductivity tester that uses the guarded hot plate method. Measurement range: 0.01–2 W/(m·K). Maximum tem...

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Technical NoteNovember 21, 2012

High-Temperature Specific Heat Capacity Tester: Features and Technical Specifications

The high-temperature specific heat capacity tester is based on the mixed method and leverages modern computer-based measurement to automatically determine the specific heat capacity of solid materials...

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Technical NoteNovember 21, 2012

Applications of Thermal Conductivity Meters for Insulation Materials

A thermal conductivity meter for insulation materials is used to determine the thermal conductivity of solid materials commonly employed in building and industrial insulation. Typical test specimens i...

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Technical NoteNovember 21, 2012

Sanitary Ceramics Output Declines; Bathroom Fixture Makers Poised for Faster Growth in H2

China’s National Building Materials and Home Furnishing Prosperity Index (BHI) indicates that in January–June 2012, large-scale building materials enterprises recorded sales output of RMB 2.5 trillion...

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Technical NoteNovember 21, 2012

High-Temperature Thermal Conductivity Tester for Insulating and Graphite Materials

This high-temperature thermal conductivity tester for insulating and graphite materials uses the direct-current longitudinal heat flow method to measure thermal conductivity at elevated temperatures. ...

1 min readRead article
Technical NoteOctober 27, 2012

Working Principle of a Thermal Conductivity Meter

A thermal conductivity meter based on the guarded hot plate method typically employs a dual-specimen measurement configuration with a guarded hot plate assembly comprising a heating unit and a cooling...

1 min readRead article
Technical NoteOctober 27, 2012

Measurement Capabilities of a Dilatometer

A dilatometer is used to characterize how materials change dimension with temperature. It provides quantitative insight into thermal behavior that is essential for materials development, quality contr...

1 min readRead article
Technical NoteOctober 27, 2012

The Broad Applications of Dilatometers

A dilatometer measures dimensional change of a sample as a function of temperature or time under a defined temperature program, with near-zero applied load. It is suitable for solids, molten metals, p...

1 min readRead article
Technical NoteOctober 27, 2012

Applicable Standards for Thermal Conductivity Meters

A thermal conductivity meter is used to measure the thermal conductivity of homogeneous, plate-like materials such as foamed concrete, mortar, plastics, rubber, glass, fibers, polystyrene boards, extr...

1 min readRead article
Technical NoteOctober 24, 2012

Measuring Thermal Conductivity: Methods, Instruments, and Application Ranges

Thermal conductivity (or thermal resistance) is a primary thermal property of insulation materials and a key indicator of their performance. With increasing emphasis on building energy efficiency, acc...

3 min readRead article
Technical NoteOctober 23, 2012

Measuring the Coefficient of Thermal Expansion

Switching to a polycrystalline mullite fiber furnace body has significantly improved our thermal expansion measurement workflow. Because the furnace body itself neither absorbs nor conducts heat, the ...

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Technical NoteSeptember 20, 2012

Hunan Zhenhua National Day Holiday Notice

Hunan Zhenhua will observe the National Day holiday in 2012. Normal operations will pause during the official holiday period and resume immediately afterward. For scheduling, deliveries, and support a...

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Technical NoteJune 8, 2010

Permeability of Refractory Products: GB/T 3000-1999 Test Standard

This article summarizes the GB/T 3000-1999 standard for evaluating the permeability of refractory products. Permeability is a key property that reflects how easily gases pass through a refractory body...

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Technical NoteApril 16, 2010

Measuring Steady-State Thermal Resistance of Insulation Materials: Heat Flow Meter Method (GB/T 10295-1988)

This article outlines the applicable standard for determining the steady-state thermal resistance and related properties of insulation materials using the heat flow meter method, as defined in GB/T 10...

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Technical NoteApril 9, 2010

Epoxy Resin Softening Point Determination Method (GB 12007.6-89)

This article outlines the standard method for determining the softening point of epoxy resins in accordance with GB 12007.6-89. The softening point is a critical parameter used to evaluate the thermal...

2 min readRead article

Showing 91 - 120 of 121 articles