bariummetatitanate
Barium titanate(IV)
CAS: 12047-27-7
Molecular Formula: BaO3Ti
bariummetatitanate - Names and Identifiers
| Name | Barium titanate(IV) |
| Synonyms | vk4 yv100an vk4(oxide) titanate barium Barium titanate oxygen(-2) anion barium(+2) cation bariummetatitanate Barium titanate(IV) titanium(+4) cation Barium titanium oxide bariumtitaniumtrioxide barium titanium trioxide Bariumtitanatewhitepowder dibarium tetraoxidotitanium barium dioxido(oxo)titanium Bariumtitanatesinteredlumpmmwhitepieces |
| CAS | 12047-27-7 |
| EINECS | 234-975-0 |
| InChI | InChI=1/2Ba.4O.Ti/q2*+2;4*-1;/r2Ba.O4Ti/c;;1-5(2,3)4/q2*+2;-4 |
| InChIKey | WNKMTAQXMLAYHX-UHFFFAOYSA-N |
bariummetatitanate - Physico-chemical Properties
| Molecular Formula | BaO3Ti |
| Molar Mass | 233.19 |
| Density | 6.08g/mLat 25°C(lit.) |
| Melting Point | 1625 °C |
| Water Solubility | INSOLUBLE |
| Solubility | Soluble in alcohols |
| Vapor Presure | 0Pa at 20℃ |
| Appearance | White powder |
| Specific Gravity | 6.08 |
| Color | White to gray |
| Merck | 14,1000 |
| PH | 9.6 (20g/l, H2O, 25℃)(slurry) |
| Storage Condition | no restrictions. |
| MDL | MFCD00003447 |
| Physical and Chemical Properties | Character white powder. melting point 1625 ℃ relative density 6.017 solubility: soluble in concentrated sulfuric acid, hydrochloric acid and hydrofluoric acid, insoluble in hot dilute nitric acid, water and alkali. |
| Use | Mainly used for the preparation of electronic ceramics, PTC thermistors, capacitors and other electronic components |
bariummetatitanate - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | 20/22 - Harmful by inhalation and if swallowed. |
| Safety Description | S28 - After contact with skin, wash immediately with plenty of soap-suds. S28A - |
| UN IDs | UN 1564 6.1/PG 3 |
| WGK Germany | 1 |
| RTECS | XR1437333 |
| TSCA | Yes |
| HS Code | 28419085 |
| Hazard Class | 3 |
| Packing Group | III |
bariummetatitanate - Nature
Open Data Verified Data
white powder. There are two kinds of tetragonal and hexagonal crystal, the most common is tetragonal crystal. Tetragonal crystal d 6.017, hexagonal crystal d 5.806. Melting Point: 1625 °c; Dielectric constant: about 4000; Coefficient of thermal expansion: 0. 12(25-100 °c), 1.02( 400 °c), 2. 61 ( 800 degrees C), 4.44(1200 degrees C). The hexagonal crystal transforms into a tetragonal crystal at -5 °c, and the tetragonal crystal transforms into a cubic crystal at 120 °c. Insoluble in water, hot dilute nitric acid, alkali; Soluble in concentrated sulfuric acid, hydrochloric acid and hydrofluoric acid. Barium oxide and titanium oxide fumes are thermally decomposed.
Last Update：2024-01-02 23:10:35
bariummetatitanate - Preparation Method
Open Data Verified Data
after mixing the refined titanium tetraoxide solution and barium oxide solution, the reaction is carried out by adding refined oxalic acid at 70~100 ℃, and the product is filtered, washed and dried, high purity barium titanate was obtained by calcination at 700 ~ lOOO °c and final sieving.
Last Update：2022-01-01 08:54:34
bariummetatitanate - Introduction
Barium titanate crystal has such characteristics: when it changes its shape under pressure, it will generate current, and once it is energed, it will change its shape. Therefore, people put barium titanate in the ultrasonic wave, it will generate current under pressure, and the magnitude of the current generated by it can measure the strength of the ultrasonic wave. On the contrary, using high-frequency current through it can generate ultrasonic waves. At present, barium titanate is used in almost all ultrasonic instruments. In addition, barium titanate has many uses. For example, railway workers put it under the tracks to measure the pressure when the train passes through. Doctors use it to make pulse recorders. The underwater detector made of barium titanate is a sharp underwater eye. It can not only see fish schools, but also see reefs, icebergs and enemy submarines under the water.
Last Update：2022-10-16 17:12:39
bariummetatitanate - Use
Open Data Verified Data
high purity ultrafine barium titanate powder is mainly used for the manufacture of dielectric ceramics and sensitive ceramics. Barium titanate ceramic is a typical ferroelectric material and an important PTC (positive temperature coeffi-cient) material in the electronics industry. Its crystal has a high dielectric constant, stable electrical constant and thermal parameters, can be used as the manufacture of nonlinear elements, dielectric amplifiers, electronic computer memory elements, materials for components such as micro-capacitors and ultrasonic generators. Barium titanate also has piezoelectric properties for electromechanical conversion. It can be used as the material of electric record head, groundwater detection device and ultrasonic generator.
Last Update：2022-01-01 08:54:34
bariummetatitanate - Safety
Open Data Verified Data
rat oral LDso>15000mg/kg. Storage in a cool, dry, clean warehouse, should be sealed to store, pay attention to leakage, not with acids and flammable items are stored in the mixed, during transport should be protected from rain and moisture.
Last Update：2022-01-01 08:54:35
bariummetatitanate - Reference Information
| LogP | 1 at 20℃ |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| barium titanate piezoelectric ceramic | barium titanate (BaTiO3) is a typical perovskite-type structural crystal with high dielectric constant, low dielectric loss, large resistivity, high withstand voltage strength and excellent insulation properties, widely used in multilayer ceramic capacitors (MLCC), thermistors (PTCR), electro-optical devices and dynamic random access memory (FRAM), etc., it is the basic raw material of electronic functional ceramic devices, so it is called by the majority of scholars and manufacturers The pillar of the electronic ceramic industry. Barium titanate is a consistent molten compound with a melting point of 1618 ℃. It has five crystal variants: hexagonal crystal type, cubic crystal type, tetragonal crystal type, square crystal type, and cubic crystal type; it is stable in square crystal type at room temperature. Br> barium titanate is the first piezoelectric ceramic with perovskite structure. after high voltage polarization treatment, it can obtain excellent piezoelectricity, and after the polarization voltage is canceled, the excellent piezoelectric effect still exists. BaTiO3 is a polycrystalline ceramic, which is sintered at high temperature and is suitable for large-scale preparation. It has excellent dielectric and piezoelectric properties at room temperature. At present, it has been widely used. The disadvantage of BaTiO3 ceramics is that its Curie point TC is low (only 120 ℃) and the sintering temperature is as high as 1300 ℃. |
| toxicity | see barium carbonate. |
| properties | status: white powder size: 100-300nm purity: 99wt% main ingredient: BaTiO3 |
| Application | Mainly used in the manufacture of dielectric ceramics and sensitive ceramics, it is widely used in automatic temperature control heating components, multilayer ceramic capacitors, PTC thermistor devices, Electro-optic devices, automotive power batteries and other fields, especially in the military, aerospace and electric vehicle power batteries, have extremely broad development prospects. |
| storage conditions | storage conditions: dry, dark and sealed storage, with a maximum storage period of one year. |
| use | mainly used for the preparation of electronic ceramics, PTC thermistors, capacitors and other electronic components widely used in the electronic industry, can be used to manufacture nonlinear components, dielectric amplifiers, memory components of electronic computers, and also used to manufacture micro capacitors with small volume and large capacitance. It can also be used as a material for manufacturing ultrasonic generators and other components. It is mainly used in the electronic industry as a material for manufacturing nonlinear components, dielectric amplifiers, memory components of electronic computers, miniature capacitors, ultrasonic generators and other components. |
| production method | after mixing refined titanium tetrachloride solution and refined barium chloride solution, add refined oxalic acid (ratio TiCl4:BaCl2:H2C2O4?2H2O is 1:1:2) to react and generate barium titanium oxalate precipitation, which is filtered, washed, dried, calcined at 700~1000 ℃, and then screened to obtain high purity barium titanate. Its TiCl4 BaC12 2H2C2O4 5H2O → BaTiO(C2O4)2?4H2O ↓ 6HClBaTiO(C2O4)2?4H2O[△]→ BaTiO3 4H2O 2CO2 ↑ 2CO ↑ oxalic acid precipitation method After mixing refined titanium tetrachloride solution and refined barium chloride solution, refined oxalic acid (the ratio of TiCl4:BaC12:H2C2O4 · 2H2O is 1:1:2) is added at 70~100 ℃ for reaction to generate barium oxytitanium oxalate precipitation, which is filtered, washed and dried, and calcined at 700~1000 ℃, after screening, the finished product of barium titanate is obtained. Its BaCl2 TiCl4 2H2C2O4 5H2O → BaTIO(C2O4)2 · 4H2O ↓ 6HClBaTiO(C2O4)2 · 4H2O → BaTiO3 4H2O 2CO2 ↑ 2CO ↑ solid phase method mixes barium carbonate and titanium dioxide (1:1), grinds, extrudes, calcinates at 1200 ℃, and then grinds, wet grinds, filters, dries, and grinds to obtain the finished powder barium titanate. BaCO3 TiO2→BaTiO3 CO2↑ |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD50: >12000 mg/kg; Abdominal cavity-mouse LD50: 420 mg/kg |
| flammability hazard characteristics | thermal decomposition of toxic barium oxide and titanium oxide smoke |
| storage and transportation characteristics | ventilation and low temperature drying |
| fire extinguishing agent | dry powder, foam, sand, carbon dioxide, mist water |
Last Update：2024-04-10 22:29:15
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