Glass TestingGlass

Glass Crystallization Test Furnace

The GXT glass crystallization test furnace uses the gradient furnace method to determine the crystallization temperature range, upper and lower limits, and degree of crystallization in glass. It is used to test glass, gemstones, and other non-metallic materials in factory, school, and research laboratories.

Model
GXT
Category
Glass Testing

Product Description

The GXT uses the gradient furnace method with a temperature gradient of 1000–1,600 °C. Crystallization is the spontaneous formation of crystals by glass under certain conditions; the test determines the crystallization temperature range, its upper and lower limits, and the degree of crystallization.

These results can be used when establishing melting, forming, and thermal-processing conditions. The furnace is used for testing the crystallization properties of glass and other nonmetallic materials.

Technical Specifications

ParameterSpecification
Maximum temperature1,650 °C
Common operating temperatures1,000 °C, 1,300 °C, 1,400 °C, 1,600 °C
Furnace chamber sizeØ60/Ø50 mm; length 1000 mm; heating-zone length 400 mm
Furnace chamber material99.99% alumina; temperature resistance up to 1,700 °C
Insulation layer thicknessAt least 100 mm for both the cylindrical and end-face layers
Insulation materialMullite fiber; temperature resistance up to 1,600 °C
Heating rate0–15 °C/min, adjustable
Furnace power6 kW or 8 kW
Feeding methodManual feeding from the low-temperature end
Observation port diameterØ60 mm
Temperature gradient1000–1,600 °C

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