Method for preparing lithium niobium titanium microwave medium ceramic powder by using hydrothermal process
A microwave dielectric ceramic and hydrothermal technology, applied in the field of material science, can solve the problems of coarse powder particles, low sintering activity, Ti reduction, etc., and achieve the effects of low preparation cost, short reaction time, and improved particle size distribution.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0020] Weigh 1 mol of butyl titanate, 1 mol of lithium carbonate, and 0.6 mol of niobium oxide into the hydrothermal reaction autoclave, measure 100 ml of deionized water, stir gently with a glass rod, and add ammonia water to adjust the pH to 10, weigh Get 20g polyacrylic acid ammonium salt and join in the autoclave, after stirring evenly, seal the autoclave.
[0021] Raise the temperature to a hydrothermal temperature of 100°C at a rate of 1°C / min, adjust the pressure of the reaction autoclave to 10MPa, turn off the power of the autoclave after 6 hours of reaction time, and take out the reaction powder after the temperature in the autoclave drops to room temperature, and use deionized water Rinse and filter repeatedly, and dry the filtered powder to obtain a white powder.
[0022] Grind and sieve the above-mentioned mixed powder, put it into a high-alumina crucible, and calcinate at 700°C to obtain a white powder, which is the lithium niobium titanium microwave dielectric ce...
Embodiment 2
[0025] Weigh 1 mol of butyl titanate, 1.2 mol of lithium carbonate, and 0.7 mol of niobium oxide into the hydrothermal reaction autoclave, measure 120 ml of deionized water, stir gently with a glass rod, and add ammonia water to adjust the pH to 10. Weigh 22g of polyacrylic acid ammonium salt into the autoclave, stir evenly and then seal the autoclave.
[0026] Raise the temperature at a rate of 2°C / min to a hydrothermal temperature of 120°C, adjust the pressure of the reaction autoclave to 20MPa, turn off the power of the autoclave after the reaction time of 8 hours, and take out the reaction powder after the temperature in the autoclave drops to room temperature, and use deionized water Rinse and filter repeatedly, and dry the filtered powder to obtain a white powder.
[0027] The above mixed powder is ground and sieved, put into a high alumina crucible, and calcined at 800°C to obtain a white powder, which is the lithium niobium titanium microwave dielectric ceramic powder ...
Embodiment 3
[0030] Weigh 1 mol of butyl titanate, 0.95 mol of lithium carbonate, and 0.5 mol of niobium oxide into the hydrothermal reaction autoclave, measure 115 ml of deionized water, stir gently with a glass rod, and add ammonia water to adjust the pH value to 10. Take by weighing 22.5g polycarboxylate ammonium salt and join in the autoclave, after stirring evenly, seal the autoclave.
[0031] Raise the temperature at a rate of 4°C / min to a hydrothermal temperature of 130°C, adjust the pressure of the reaction autoclave to 20MPa, turn off the power of the autoclave after 10 hours of reaction time, and take out the reaction powder after the temperature in the autoclave drops to room temperature, and use deionized water Rinse and filter repeatedly, and dry the filtered powder to obtain a white powder.
[0032] The above mixed powder is ground and sieved, put into a high alumina crucible, and calcined at 800°C to obtain a white powder, which is the lithium niobium titanium microwave diel...
PUM
| Property | Measurement | Unit |
|---|---|---|
| quality factor | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More