fused quartz
LowTechnical/Scientific
Definition
Meaning
A high-purity glass made by melting naturally occurring crystalline quartz (silica) at extremely high temperatures, resulting in a non-crystalline (amorphous) solid.
A material prized for its exceptional optical clarity, thermal stability, and chemical purity, used in specialized applications like lenses, fiber optics, and laboratory ware.
Linguistics
Semantic Notes
Always refers to the manufactured glassy material, not the natural mineral. The 'fused' denotes the process of melting and solidifying without crystallisation.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling remains consistent.
Connotations
Identical technical connotations in both varieties.
Frequency
Equally low-frequency and specialised in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
[noun] made of fused quartzfused quartz [noun] (e.g., tube, lens)[verb] fused quartz (e.g., produce, manufacture, use)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Used in procurement and specification contexts for high-tech manufacturing.
Academic
Central to materials science, optics, and chemistry research papers.
Everyday
Virtually never used in everyday conversation.
Technical
The primary register; used in engineering, optics, semiconductor, and laboratory equipment documentation.
Examples
By Part of Speech
adjective
British English
- The fused-quartz component is essential.
- We need a fused-quartz liner.
American English
- The fused-quartz component is critical.
- We require a fused-quartz liner.
Examples
By CEFR Level
- This lens is made from a special glass.
- The laboratory used tubes made of fused quartz.
- Due to its low thermal expansion, fused quartz is ideal for precision optics.
- The reactor's viewing port was constructed from optical-grade fused quartz to withstand both the corrosive atmosphere and extreme temperature fluctuations.
Learning
Memory Aids
Mnemonic
Think of a quartz crystal FUSED by intense heat into a smooth, clear glass.
Conceptual Metaphor
PURITY AS CLARITY; STABILITY AS RESISTANCE (to heat/chemicals).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid literal translation as 'плавленый кварц' in non-technical contexts, as it sounds odd. Use 'кварцевое стекло' which is the standard term.
Common Mistakes
- Using 'fused quartz' to refer to natural quartz crystals. Incorrect article use (e.g., 'a fused quartz' – it's generally uncountable).
Practice
Quiz
What is the primary characteristic that distinguishes fused quartz from ordinary glass?
FAQ
Frequently Asked Questions
No. While both are amorphous solids, fused quartz is made from almost pure silica, giving it much higher thermal stability, chemical resistance, and optical clarity than common soda-lime glass.
Yes, it has a very high softening point (around 1665°C) and low thermal expansion, making it excellent for high-temperature applications like furnace tubes.
In practice, the terms are often used interchangeably. Technically, 'fused quartz' implies the raw material was natural quartz crystals, while 'fused silica' can come from other silicon sources, but the final products are virtually identical.
Its extreme purity allows light to travel through it with minimal loss or distortion, which is essential for transmitting data over long distances in optical fibres.