Preparation of ZnS particles doped with copper
a technology of zns particles and copper ions, which is applied in the direction of discharge tube luminescence screens, cathode ray/electron stream lamps, electric discharge lamps, etc., can solve the problems of high temperature, large final average particle size (5-20 m), and high temperature needed. , to achieve the effect of enhancing luminescen
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example 1
Preparation of ZnS:Cu Dispersion 1 (Control)
[0039] The following solutions were prepared:
Solution 1Zn(SO4).7H2O905.8gCuCl0.15gWaterto 1500ml
[0040]
Solution 2Na2S.9H2O560.8gNH3 (25% in water)24.4mlWaterto 1500ml
[0041]
Solution 3Zn(SO4).7H2O21.6gKCL100gWaterto 1500ml
[0042] The ZnS:Cu dispersion was prepared as follows:
[0043] To solution 3, held at room temperature and stirred at 1500 rpm, solution 1 and solution 2 were added simultaneously at room temperature at a flow rate of 500 ml / min.
[0044] To this predispersion, 250 ml thioglycerol was added and this dispersion was diafiltrated through a Fresenius F60 cartridge by using a 5% solution of thioglycerol in water. This dispersion could be washed successfully until a conductivity of 0.5 mS / cm was reached.
[0045] This dispersion showed no luminescence upon radiation at wavelengths between 250-350 nm.
example 2
Preparation of the ZnS:Cu-Dispersion 2 (Control)
[0046] The following solution was prepared:
Solution 4Zn(SO4).7H2O905.8gCuCl0.15gThioureum58.7gDWto 1500ml
[0047] The ZnS:Cu dispersion was prepared as follows:
[0048] To solution 3, held at room temperature and stirred at 1500 rpm, solution 4 and solution 2 were added simultaneously at room temperature at a flow rate of 500 ml / min.
[0049] To this predispersion, 250 ml thioglycerol was added and this dispersion was diafiltrated through a Fresenius F60 cartridge by using a 5% solution of thioglycerol in water. This dispersion could be washed successfully until a conductivity of 0.5 mS / cm was reached.
[0050] This dispersion showed no luminescence upon radiation at wavelengths between 250-350 nm.
example 3
Preparation of the Zn(Cu)S-Dispersion 3 (Control)
[0051] The following solution was prepared:
Solution 5Zn(SO4).7H2O905.8gCuCl0.15gSodium thiosulphate58.7gWaterto 1500ml
[0052] The ZnS:Cu dispersion was prepared as follows: To solution 3, held at room temperature and stirred at 1500 rpm, solution 5 and solution 2 were added simultaneouly at room temperature at a flow rate of 500 ml / min.
[0053] To this predispersion, 250 ml thioglycerol was added and this dispersion was diafiltrated through a Fresenius F60 cartridge by using a 5% solution of thioglycerol in water. This dispersion could be washed successfully until a conductivity of 0.5 mS / cm was reached.
[0054] This dispersion showed no luminescence upon radiation at wavelengths between 250-350 nm.
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