Quartz Watch Glasses

Material: 99.99% fused quartz glass (SiO₂)
Technique: cutting, polishing, etching, marking, etc.
MOQ: 20 pcs

Description

Characteristics

Physical Properties	Values
Purity	＞99.99%
Density	2.2g/cm³
Transparency	＞90%
Mohs Hardness	5.5--6.5
Deformation Point	1280℃
Softening Point	1780℃
Annealing Point	1250℃
Specific Heat (20 - 350°C)	670J/kg.℃
Thermal Conductivity (20°C)	1.4W/m.℃
Heat Conductivity (w/m.k,1000 ℃ )	1.0-1.2
Refractive Index	1.4585
Coefficient of Thermal Expansion	5.5*10 ^-7cm/cm.℃
Hot - working Temperature	1750--2050℃
Short - term Service Temperature	1300℃
Long - term Service Temperature	1100℃

Chemical Properties	Values
Acid resistant	Strong Acid(except HF),Strong alkali, organic solution
High temperatures Corrosion resistant	Excellent
Metal Impurity Content	＜5 ppm

Electrical Properties	Values
Resistivity	7*107Ω.cm
Insulation Strength	250~400Kv/cm
Dielectric Constant	3.7~3.9
Dielectric Absorption Coefficient	＜4*10^-4
Dielectric Loss Coefficient	＜1*10^-4

Q1: How do I clean a quartz surface dish?

A: Rinse with distilled water or mild solvents (e.g., acetone). Avoid abrasive scrubbers to prevent scratches.

Q2: What's the difference between quartz and borosilicate watch glasses?

A: Quartz offers higher temperature resistance and UV transparency, while borosilicate is cheaper but less durable.

Q3: Is Quartz Watch Glasses breakable?

A: While more resistant to thermal shock than regular glass, it can still crack under mechanical stress. Handle with care.

Q4: Can it be used in a microwave or furnace?

A: Yes, it's microwave-safe and furnace-resistant (up to 1100°C).

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