thorium dioxide: meaning, definition, pronunciation and examples
C2 (Very Low Frequency)Technical/Scientific
Quick answer
What does “thorium dioxide” mean?
A white crystalline compound composed of thorium and oxygen (ThO2).
Audio
Pronunciation
Definition
Meaning and Definition
A white crystalline compound composed of thorium and oxygen (ThO2).
A refractory ceramic material with a very high melting point, historically used in gas mantles for incandescent lighting and considered as a nuclear fuel in some reactor designs, particularly for its properties when combined with uranium.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling of related terms may differ (e.g., 'catalyse' vs. 'catalyze').
Connotations
Identical technical connotations in both varieties.
Frequency
Equally rare in both varieties, confined to highly specialised fields.
Grammar
How to Use “thorium dioxide” in a Sentence
Thorium dioxide is used as [a nuclear fuel/a refractory material].The properties of thorium dioxide make it suitable for [application].Vocabulary
Collocations
Examples
Examples of “thorium dioxide” in a Sentence
adjective
British English
- The thorium-dioxide-based fuel showed remarkable stability.
American English
- The thorium dioxide coating provided excellent thermal protection.
Usage
Meaning in Context
Business
Virtually never used. Potential mention in reports of companies involved in nuclear energy or advanced ceramics.
Academic
Used in research papers and textbooks on inorganic chemistry, nuclear engineering, and materials science.
Everyday
Extremely rare. May appear in historical contexts about lighting or advanced articles on alternative energy.
Technical
The primary domain of use. Specific to discussions of nuclear fuel cycles (e.g., molten salt reactors), refractory linings, or historical lighting technology.
Vocabulary
Synonyms of “thorium dioxide”
Neutral
Weak
Watch out
Common Mistakes When Using “thorium dioxide”
- Confusing it with 'thorium oxide', which can sometimes refer to other stoichiometries, though 'thorium dioxide' is the most stable and common. Mispronouncing 'thorium' as /ˈθoʊriəm/ instead of /ˈθɔːriəm/.
FAQ
Frequently Asked Questions
While chemically stable, it is a radioactive material (primarily alpha emission) and poses an internal hazard if inhaled or ingested. It must be handled with appropriate radiological controls.
'Thoria' is a traditional, abbreviated name for the mineralogical or ceramic form of thorium dioxide, similar to 'alumina' for aluminium oxide.
Not in current commercial light-water reactors. It is being researched for use in next-generation reactor designs, like molten salt reactors or as part of mixed-oxide (MOX) fuels in other systems.
It is typically a white crystalline powder or ceramic. When very pure, it is colourless, but technical grades often appear white.
A white crystalline compound composed of thorium and oxygen (ThO2).
Thorium dioxide is usually technical/scientific in register.
Thorium dioxide: in British English it is pronounced /ˌθɔːriəm daɪˈɒksaɪd/, and in American English it is pronounced /ˌθɔriəm daɪˈɑksaɪd/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'THOR's mighty hammer needs a DIOXide (two oxygen) shield.' ThO2 = Thorium Dioxide.
Conceptual Metaphor
A WHITE, UNYIELDING SHIELD (due to its refractory nature and stability).
Practice
Quiz
What is the primary technical reason for the historical use of thorium dioxide in gas mantles?