You Are Here：Home > Information dynamics
> Industry trends
新聞導(dǎo)航
What are the characteristics of calcium fluoride
info：www.crimea-realty.net | Release time：2026-11-04
The natural mineral of calcium fluoride is called fluorite (fluorite). High purity synthesized calcium fluoride crystals are key materials in the optical and semiconductor industries, with the chemical formula CaF ? and an equiaxed cubic crystal structure.
1、 Physical characteristics
1. Appearance: Pure product is colorless transparent crystal or white powder; Natural fluorite presents various colors such as green, purple, blue, and yellow due to impurities, with a glassy luster and brittle nature.
2. Mechanical parameters: Mohs hardness of 4, with a soft texture that is prone to cracking; Density 3.18 g/cm 3; The melting point is about 1423 ℃ and the boiling point is about 2500 ℃.
3. Highlight optical characteristics (core advantage): The transmission band is extremely wide, and both deep ultraviolet, visible light, and infrared can be transmitted; Low refractive index (about 1.434) and low dispersion, making it one of the few ultraviolet optical materials; Fluorescence can be generated under UV, cathode ray, and heating conditions (source of fluorite name).
4. Thermal characteristics: high coefficient of thermal expansion, poor thermal conductivity, weak resistance to thermal shock, rapid alternation of hot and cold, and easy cracking.
5. Solubility characteristics: extremely difficult to dissolve in water, almost insoluble in organic solvents such as acetone; It can only be dissolved in hot concentrated sulfuric acid, concentrated hydrochloric acid, aluminum salt/iron salt solutions (chelation dissolution).
2、 Chemical characteristics
1. Good stability at room temperature: resistant to alkali, most dilute acids, atmospheric corrosion, and strong chemical inertness under normal conditions.
2. Reaction with concentrated sulfuric acid: The reaction generates HF (hydrogen fluoride, a highly corrosive and toxic gas), which is the basic reaction for producing hydrofluoric acid in fluorine chemical industry and also the main safety risk point.
3. High temperature hydrolysis: Under high temperature environments above 800 ℃, it will gradually hydrolyze, generating CaO and releasing hydrogen fluoride; At high temperature, it can form eutectic with a variety of metal oxides, and has the ability to aid melting.
4. Low toxicity: It has low toxicity itself, but the hydrogen fluoride produced by decomposition is highly corrosive and toxic.
3、 Summary of Characteristics Corresponding to Industrial Applications
Low dispersion, wide spectral transmittance: used for UV lenses, infrared windows, lithography machine optical lenses, spectrometer lenses;
Fusing aids and melting point lowering agents: steel and non-ferrous smelting fluxes, glass, ceramics, cement mineralizers;
Stable fluorine source: Basic raw materials for fluorine chemical industry, preparing hydrofluoric acid, fluororesin, and fluorine electronic chemicals;
Corrosion resistant fillers: Some special coatings, lubricants, ceramic fillers.
1、 Physical characteristics
1. Appearance: Pure product is colorless transparent crystal or white powder; Natural fluorite presents various colors such as green, purple, blue, and yellow due to impurities, with a glassy luster and brittle nature.
2. Mechanical parameters: Mohs hardness of 4, with a soft texture that is prone to cracking; Density 3.18 g/cm 3; The melting point is about 1423 ℃ and the boiling point is about 2500 ℃.
3. Highlight optical characteristics (core advantage): The transmission band is extremely wide, and both deep ultraviolet, visible light, and infrared can be transmitted; Low refractive index (about 1.434) and low dispersion, making it one of the few ultraviolet optical materials; Fluorescence can be generated under UV, cathode ray, and heating conditions (source of fluorite name).
4. Thermal characteristics: high coefficient of thermal expansion, poor thermal conductivity, weak resistance to thermal shock, rapid alternation of hot and cold, and easy cracking.
5. Solubility characteristics: extremely difficult to dissolve in water, almost insoluble in organic solvents such as acetone; It can only be dissolved in hot concentrated sulfuric acid, concentrated hydrochloric acid, aluminum salt/iron salt solutions (chelation dissolution).
2、 Chemical characteristics
1. Good stability at room temperature: resistant to alkali, most dilute acids, atmospheric corrosion, and strong chemical inertness under normal conditions.
2. Reaction with concentrated sulfuric acid: The reaction generates HF (hydrogen fluoride, a highly corrosive and toxic gas), which is the basic reaction for producing hydrofluoric acid in fluorine chemical industry and also the main safety risk point.
3. High temperature hydrolysis: Under high temperature environments above 800 ℃, it will gradually hydrolyze, generating CaO and releasing hydrogen fluoride; At high temperature, it can form eutectic with a variety of metal oxides, and has the ability to aid melting.
4. Low toxicity: It has low toxicity itself, but the hydrogen fluoride produced by decomposition is highly corrosive and toxic.
3、 Summary of Characteristics Corresponding to Industrial Applications
Low dispersion, wide spectral transmittance: used for UV lenses, infrared windows, lithography machine optical lenses, spectrometer lenses;
Fusing aids and melting point lowering agents: steel and non-ferrous smelting fluxes, glass, ceramics, cement mineralizers;
Stable fluorine source: Basic raw materials for fluorine chemical industry, preparing hydrofluoric acid, fluororesin, and fluorine electronic chemicals;
Corrosion resistant fillers: Some special coatings, lubricants, ceramic fillers.
Prev:
What should be noted when using ammonium fluorosi…
Next:
What are the mainstream industrial preparation ro…
【Related articles】
【Related products】
Website Navigation
Contact Us
- Company Address: Fluorination Technology Park, Changshu City, Jiangsu Province
- Service Hotline: 0512-52818267
- Technical Consultation: 0512-52626090
- Contact phone number: 13601573215
- Company email: 13601573215@163.com
Copyright © 2023 Changshu Hongjia Fluorine Technology Co., Ltd All Rights Reserved www.crimea-realty.net 蘇ICP備11048419號(hào)-2 
蘇公網(wǎng)安備32058102001807號(hào) Technical Support：Lange
蘇公網(wǎng)安備32058102001807號(hào) Technical Support：Lange
+
wechat number：Zz5203520
wechat number：Zz5203520
Home
WeChat
Tell