Potassium titanyl phosphate synthesis essay
Sol-gel synthesis of potassium titanyl phosphate: Solution chemistry ..
potassium titanyl phosphate synthesis essay
The use of alkali metal - metal selected from the group comprising potassium, rubidium, cesium, due to the range of compositions of the obtained compounds of phosphate Titania alkali metal. The use of other alkali metals, particularly lithium and sodium, is difficult due to the higher their degree of hydration of the cations in the aquatic environment.
PVP of the prostate is a form of transurethral prostatectomy performed using a 600 micron side- firing fiber in a noncontact mode. The primary difference from HoLAP is its wavelength of 532 nm (in the green visible spectrum) which is absorbed by both the water irrigation and hemoglobin resulting in an optical penetration depth of 0.8 mm. The other acronyms for this procedure, KTP (potassium tintanyl phosphate) and LBO (lithium borate), identify the crystal used in the laser generator. Typically performed using normal saline irrigation and a continuous flow scope, the goal of PVP is to create a TURP-like cavity after ablating the various prostatic lobes down to the surgical capsule. Symptom scores improved consistently in all studies,91, 92 as did QoL scores93, 94 and maximum urinary flow rates.94, 95
Global Potassium Titanyl Phosphate (KTP) Market …
91. Carter A, Sells H, O'Boyle P: High-power KTP laser for the treatment of symptomatic benign prostatic enlargement. BJU Int 1999; 83: 857.
In the beginning, studies were concentrated on inorganic materials such as quartz, potassium dihydrogen phosphate (KDP), lithium niobate (LiNbO 3 ), and its analogues, potassium titanyl phosphate (KTP) and its analogues, Beta Barium Borate  and semiconductors such as cadmium sulfide, selenium, and tellurium.
Greenlight: from potassium-titanyl-phosphate to …
1. The method of obtaining powder of phosphate Titania alkali metal, including interaction in the aquatic environment, the source of titanium compounds, alkali metal and phosphorus taken during the excess molar ratio of alkali metal to titanium at elevated temperatures with the formation of the suspension, the separation of the solid phase phosphate Titania alkali metal, washing and drying, characterized in that the interaction of the parent compounds is carried out at a molar ratio in the suspension of phosphorus to titanium (1,05-3,0):1 and so is the temperature value from the 60°C to the boiling temperature of the working suspension, and the concentration of the alkaline metalMand ions of hydrogen, CN +connected by the relationM/SN +≥104.2. The method according to claim 1, characterized in that the alkali metal use metal selected from the group comprising potassium, rubidium, cesium.3. The method according to claim 2, characterized in that compounds of the alkali metal used is a water-soluble substance selected from the group comprising its phosphate, chloride, nitrate, sulfate.4. The method according to claim 1 or 3, characterized in that the titanium compounds used substance selected from the group comprising titanium tetrachloride, oxohydroxide titanium, oxochloride titanium, titanyl sulphate, monohydratefast of Titania.5. The method according to claim 4, characterized in that as the phosphorus compounds used phosphate of an alkali metal.6. The method according to claim 4, characterized in that as the phosphorus compounds used phosphoric acid.7. The method according to claim 6, characterized in that the suspension is optionally enter a hydroxide or carbonate of an alkali metal.8. The method according to claim 1, characterized in that the washing of the solid phase phosphate of Titania alkali metal lead demineralized water.
Example 5. A portion of titanium tetrachloride TiCl4containing 1.6 g in terms of titanium dioxide, Rasulova the t in 10 ml of 1.44 mol/l potassium chloride KCl, 15 ml of 1.44 mol/l of nitrate rubidium RbNO3, 25 ml, 1.12 mol/l phosphoric acid, H3PO4and 50 ml of 3.28 mol/l potassium carbonate To2CO3at pH 9 and temperature of 85°C. When the molar ratio of (K+Rb):Ti is 10, the ratio of P:Ti=1,4, and the concentration ratio of the alkali metal WithMand hydrogen ions WithN +is 1,78·109. Fine suspension resulting from the interaction of the parent compounds, filtered. The separated solid phase is washed with 150 ml of demineralized water and dried in air for 1 hour. You get a monophasic crystalline powder that represents a solid solution of phosphate of Titania potassium and rubidium K0,8Rbof 0.2TiOPO4with an average particle size of 30 nm.
Synthesis of Nanocrystalline KTiOPO4 Powder by …
(LiNbO 3 ), and its analogues, potassium titanyl phosphate ..
potassium titanyl phosphate ..
Potassium titanyl phosphate; potassium titanyl phosphate laser;
Potassium titanyl phosphate; S
KTP - KTiOPO 4 Potassium | AcronymAttic
Synthesis of fine powders of KTP-group compounds of stoichiometric composition
Potassium Titanyl Phosphate) ..
The above private features of the invention allow a method and to carry out the synthesis in the optimal mode from the point of view of production of fine crystalline powder of phosphate Titania alkali metal directly in suspension with the exception of heat treatment and the use of a dehydrating agent.
Potassium titanyl phosphate or KTP is a ..
Example 1. A portion of oxohydroxide titanium composition of TiO(OH)2·2H2O, containing 0.8 g calculated on the anhydrous titanium dioxide, Rasulova in 50 ml of 0.5 mol/l potassium nitrate KNO3and 50 ml of 0.4 mol/l orthophosphate potassium K3PO4at pH 7 and a temperature of 80°C. When the molar ratio of K:Ti, is 11, the ratio of P:Ti=2, and the concentration ratio of the alkali metal WithMand hydrogen ions WithN +1.1·107. Fine suspension resulting from the interaction of the parent compounds, filtered. The separated solid phase was washed with 100 ml of demineralized water and dried in air for 1 hour. You get a monophasic crystalline powder of phosphate Titania and potassium KTiOPO4the stoichiometric composition with an average particle size of 40 nm.
K2S Potassium titanyl phosphate – KTiOPO4 Potassium ..
The leaching of the solid phase phosphate of Titania alkali metal demineralized water which allows more efficient washing of the synthesized crystalline powder from impurities, that increases the purity of the final product.
Potassium Titanyl Phosphate and Its Isomorphs: Growth, ..
The use of a water soluble substance selected from the group comprising its phosphate, chloride, nitrate, sulfate as a compound of an alkali metal, allows to achieve high concentrations of cations of alkali metal, which provides accelerated crystallization and contributes to the production of fine phosphate of Titania alkali metal article is geometricheskogo composition. The use of the above reagents is preferable also from the viewpoint of obtaining high-purity solutions of these compounds, which determines the high quality of the final product. In addition, a hydroxide and a carbonate of an alkali metal are effective agents for adjusting the pH of the aqueous suspension during the synthesis.
lithium tantalate (LT), potassium titanyl phosphate (KTP) or ..
The choice of the concentrations of the alkali metal WithMand hydrogen ions WithN +satisfying relationship WithM/SN +≥104due to the fact that this ratio provides complete substitution of hydrogen ions for cations of alkali metal phosphate-titanium matrix corresponding to the stoichiometry of the final product. In addition, high concentrations of alkali metal instrumental in obtaining fine product. When the value of the relationship WithM/SN +less than 104does not fully replace hydrogen ions for cations of the alkali metal, which prevents crystallization of the solid phase phosphate of Titania and alkali metal in suspension. The value of pH the pH during the synthesis process, it is advisable to maintain in the range of values from 4 to 10. the ri values of pH less than 4, there is significant competition of hydrogen ions in the process of cation substitution, and at pH values more than 10 hydrolysis of phosphate-titanium matrix, leading to violation of stoichiometry in the direction of reducing the content of phosphorus in relation to titanium.
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