CN109251030A - A kind of holmium doping potassium-sodium niobate-strontium titanates crystalline ceramics preparation method of high optics thermometer sensor DS18B20 - Google Patents

A kind of holmium doping potassium-sodium niobate-strontium titanates crystalline ceramics preparation method of high optics thermometer sensor DS18B20 Download PDF

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CN109251030A
CN109251030A CN201811375592.XA CN201811375592A CN109251030A CN 109251030 A CN109251030 A CN 109251030A CN 201811375592 A CN201811375592 A CN 201811375592A CN 109251030 A CN109251030 A CN 109251030A
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potassium
crystalline ceramics
holmium
sodium niobate
strontium titanates
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吴啸
林锦锋
鲁齐铃
林枞
徐洁
刘春文
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Fuzhou University
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Abstract

The invention discloses a kind of holmiums of high optics thermometer sensor DS18B20 to adulterate potassium-sodium niobate-strontium titanates crystalline ceramics preparation method, prepares Ho doping (K first0.5Na0.5)NbO3‑SrTiO3Powder, pass through dry-pressing compression molding, the sinter molding at 1200~1230 DEG C, maximum transmission rate is obtained up to 58%(near infrared band) holmium doping potassium-sodium niobate-strontium titanates crystalline ceramics, and there is excellent Upconversion luminescence, optical temperature senses higher (in 450K :~0.0082/K).Present invention process step is simple, reproducible, easily operated, is mainly used in the new optical devices such as electronic product and optic temperature sensor such as smart phone and touch screen of environment-friendly type.

Description

A kind of holmium doping transparent pottery of potassium-sodium niobate-strontium titanates of high optics thermometer sensor DS18B20 The preparation method of porcelain
Technical field
The present invention relates to no lead base piezoelectric material fields, and in particular to a kind of holmium doping niobium of high optics thermometer sensor DS18B20 The preparation method of sour potassium sodium-strontium titanates crystalline ceramics.
Background technique
To meet the integrated and precise treatment requirement of function photoelectric device, while having both the multi-functional material of electrical and optical properties Material causes the extensive concern of people.Wherein, transparent electronic device be considered as next-generation electronic product (such as smart phone, Electronic reader and touch screen) candidate material.Dielectric crystalline ceramics has good mechanics and thermal stability, high dielectric breakdown Intensity (DBS) and good optical transparence, it is considered to be the potential candidate of high power precise electronic material.
Lead base crystalline ceramics lead lanthanum zirconate titanate (PLZT) has a wide range of applications in field of electro-optics, but plumbum-based material is (leaded Amount is greater than 60 wt%) to environmental and human health impacts nocuousness.Therefore, exploitation lead-free is a kind of as the substitute of plumbum-based material Urgent need.Potassium-sodium niobate (KNN) base ceramics are again a kind of non-plumbum ferroelectrics with good dielectric, piezoelectricity and ferroelectric ceramics performance Ceramics are a kind of materials for being most expected to become substitution lead base crystalline ceramics.And pass through doping with rare-earth ions (RE3+) after, KNN base pottery Porcelain has excellent luminescent properties and multifunctional light electrical characteristics.
Summary of the invention
It is an object of the present invention in view of the above shortcomings of the prior art, a kind of high optics thermometer sensor DS18B20 is proposed Holmium adulterates potassium-sodium niobate-strontium titanates crystalline ceramics preparation method, and this method can provide a kind of by rare earth ion doped, has The characteristics such as ferroelectricity/piezoelectricity/dielectric, optics and excellent sensing capabilities are integrated, and environment friendly and pollution-free unleaded holmium adulterates potassium niobate Sodium-strontium titanates crystalline ceramics.
The present invention proposes a kind of holmium doping potassium-sodium niobate-strontium titanates crystalline ceramics preparation of high optics thermometer sensor DS18B20 Method comprising following steps:
(1) ingredient: by Ho2O3 、Na2CO3 、K2CO3 、Nb2O5 、SrCO3And TiO2It is mixed, obtains mixture；
(2) ball milling: being added ball-milling medium in mixture and is fitted into progress 8~12 h of ball milling in ball grinder, will after ball milling Mixture, is then put into mortar again and grinds by mixture drying；
(3) pre-burning: the mixture after grinding is added in crucible, after being compacted, is placed in Muffle furnace, is warming up to 800~850 DEG C and keep the temperature 2~4 h carry out pre-burning, then crucible is taken out after cooled to room temperature again；
(4) it secondary ball milling: toward after ball-milling medium is added in the mixture of pre-burning, then is loaded into ball grinder, carries out ball 8~12 h are ground, after ball milling, mixture is dried, then again after sieve is sieved, obtains powder；
(5) be granulated: the poly-vinyl alcohol solution that 5~15 wt% are added toward powder is uniformly mixed, and is then placed in drying in baking oven again, then It is sieved through sieve, obtains softwood；
(6) tabletting: softwood is added in mold, depresses to the green compact of 0.8~1.5 mm of thickness in the pressure of 200~300 MPa；
(7) dumping: being placed in green compact in pallet and cover, be then placed in Muffle furnace, 650~850 DEG C at a temperature of keep the temperature 120~240 min carry out dumping, then again by it with furnace cooled to room temperature；
(8) it is sintered: will be placed in Muffle furnace by the green compact of step (7) processing, 2~4 h are sintered at 1200~1230 DEG C, so Cooled to room temperature adulterates potassium-sodium niobate-strontium titanates crystalline ceramics to get to holmium afterwards.
Further, each component presses following mass ratio and carries out charge ratio, Ho in step (1)2O3 : Na2CO3 : K2CO3 : Nb2O5 : SrCO3 : TiO2=0.004~0.007: 0.399: 0.52: 1: 0.05~0.061: 0.027~ 0.033。
Further, in step (2), abrasive media is ethyl alcohol, and the weight ratio of mixture and ethyl alcohol is 1:2~1:3.
Further, in step (2) and (4), rotational speed of ball-mill is 150~280 r/min.
Further, in step (3), heating rate is 3~5 DEG C/min in the temperature-rise period of pre-burning.
Further, in step (2) and (4), drying temperature is 80~85 DEG C.
Further, the powder obtained in step (4), chemical composition general formula are yHo- (K0.5Na0.5) NbO3- xSrTiO3。
Further, the range of the x is 0.09~0.11, and the y is 0.005 or 0.01.
Further, in step (4) and (5), the aperture of the sieve is 80~100 mesh.
Further, it in step (5), after polyvinyl alcohol is added in the powder, is placed in baking oven with 90~130 DEG C of temperature Degree is dried.
In various rare earth ion RE3+In, Ho3+With ladder-like energy level abundant, it is advantageously implemented up-conversion luminescence.Separately On the one hand, up-conversion luminescence can be applied to the design of the optic temperature sensor based on fluorescence intensity ratio (FIR) technology, the temperature The sensing accuracy of sensor can be improved in degree sensor, can also provide a kind of based on RE in doped substrate3+Thermal coupling energy level Non-contact type temperature measurement method.Ho3+There are two thermal coupling energy levels for tool, respectively5F4With5S2, can be with by excitation From Ho3+'s5F4/5S2→5 I8Green emitting is generated in transition.Therefore, Ho3+Adulterating KNN base transparent ceramic has good upper turn It is transsexual multi-functional coupling to may be implemented with optical temperature sensing capabilities.Wherein, Ho is doped to potassium-sodium niobate-strontium titanates (KNNST) available with excellent luminescent properties and photoelectric characteristic with traditional Muffle furnace non-pressure sintering technology after matrix Unleaded multi-functional yHo- (K0.5Na0.5)NbO3-xSrTiO3 (Ho-KNNST) crystalline ceramics.
A kind of holmium of high optics thermometer sensor DS18B20 of the invention adulterates potassium-sodium niobate-strontium titanates crystalline ceramics preparation side Method, this method adulterate (K by Ho0.5Na0.5)NbO3-SrTiO3, the available higher yHo- (K of consistency0.5Na0.5)NbO3- xSrTiO3Crystalline ceramics, prepared ceramics have counterfeit cubic structure and higher light transmittance；Ferroelectricity, optics and luminescence generated by light The good combination of characteristic, and there is excellent thermometer sensor DS18B20, achieve multifunction；yHo-(K0.5Na0.5) NbO3-xSrTiO3Part lead base crystalline ceramics can be substituted, the industrialized production for environmentally friendly piezoelectricity transparent ceramic material is established Theory and practice basis；Present invention process step is simple, reproducible, easily operated, can be applied to the smart phone of environment-friendly type With the new optical devices such as electronic product and temperature sensing such as touch screen.
Detailed description of the invention
Fig. 1 is the XRD diagram for the Ho-KNNST crystalline ceramics sample that the specific embodiment of the invention 2 obtains；
Fig. 2 is the light transmittance figure for the Ho-KNNST crystalline ceramics sample that the specific embodiment of the invention 2 obtains；
Fig. 3 is the sterogram after the Ho-KNNST crystalline ceramics sample polishing that the specific embodiment of the invention 2 obtains；
Fig. 4 is the optical temperature sensing capabilities for the Ho-KNNST crystalline ceramics sample that the specific embodiment of the invention 2 obtains；
Fig. 5 is the SEM figure for the Ho-KNNST crystalline ceramics sample that the specific embodiment of the invention 2 obtains.
Specific embodiment
For present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate this hair It is bright rather than limit the scope of the invention.In addition, various changes or modification that those skilled in the art make the present invention, this A little equivalent forms are equally fallen in the application range claimed.Proportion in the embodiment of the present invention is by weight.
Embodiment 1
(1) ingredient: raw material Ho is weighed in mass ratio respectively2O3 : Na2CO3 : K2CO3 : Nb2O5 : SrCO3 : TiO2 = 0.004: 0.399: 0.52: 1: 0.05: 0.027, then it is uniformly mixed so as to obtain mixture；
(2) ball milling: adding mixture into ball-milling medium, is fitted into progress 8 h of ball milling in ball grinder, and rotational speed of ball-mill is 150 r/min, After ball milling, mixture is placed in baking oven and is dried with 80 DEG C of temperature, and then mixture is put into mortar again and is carried out Grinding, abrasive media are ethyl alcohol, and the weight ratio of mixture and ethyl alcohol is 1:2；
(3) pre-burning: the mixture after above-mentioned grinding is added in crucible, is compacted, is placed in Muffle furnace, with 3 DEG C/min's Heating rate, which is warming up to 800 DEG C and keeps the temperature 2 h, carries out pre-burning, then again takes out crucible after cooled to room temperature；
(4) it secondary ball milling: after ball-milling medium is added toward the above-mentioned mixture by pre-burning, then is loaded into ball grinder, carries out 8 h of ball milling, rotational speed of ball-mill is 150 r/min, after ball milling, mixture is placed in baking oven and is dried with 80 DEG C of temperature Dry, then again after the sieving of the sieve of 100 mesh, can make the chemical composition general formula is 0.005Ho- (K0.5Na0.5NbO3)- 0.09SrTiO3Powder；
(5) be granulated: the poly-vinyl alcohol solution that 5 wt% are added into powder obtained above is uniformly mixed, and is then placed in baking oven again In be dried with 90 DEG C of temperature, using 80 mesh sieve be sieved；
(6) tabletting: will by step (5) treated, powder is added in the mold of 1.2 cm of diameter, under the pressure of 200 MPa It is pressed into the green compact of 0.8 mm of thickness；
(7) dumping: green compact made from above-mentioned molding are placed in pallet and are covered, are then placed in Muffle furnace, in 650 DEG C of temperature 120 min of the lower heat preservation of degree carry out dumping, then again by it with furnace cooled to room temperature；
(8) it is sintered: will be placed in microwave agglomerating furnace by the green compact of step (7) processing, and 2 h will be sintered at 1230 DEG C, then certainly It is so cooled to room temperature, can be prepared by 0.005Ho- (K0.5Na0.5)NbO3-0.09SrTiO3Crystalline ceramics.
Performance test
By ceramics sample wear down and it is polished to 0.3 mm, surveys its light transmittance, test result shows the light transmission when wavelength is 900 nm Rate is 50%, high optical temperature sensing characteristics (in 450 K :~0.0076/K).
Embodiment 2
(1) ingredient: raw material Ho is weighed in mass ratio respectively2O3 : Na2CO3 : K2CO3 : Nb2O5 : SrCO3 : TiO2 = 0.004:0.399: 0.52: 1: 0.056: 0.03, then it is uniformly mixed so as to obtain mixture；
(2) ball milling: adding mixture into ball-milling medium, is fitted into progress 12 h of ball milling in ball grinder, and rotational speed of ball-mill is 200 r/ Min, after ball milling, mixture is placed in baking oven and is dried with 85 DEG C of temperature, and then mixture is put into mortar again It is ground, abrasive media is ethyl alcohol, and the weight ratio of mixture and ethyl alcohol is 1:2.5；
(3) pre-burning: the mixture after above-mentioned grinding is added in crucible, after being compacted, is placed in Muffle furnace, with 4 DEG C/min Heating rate be warming up to 850 DEG C and 4 h of lower heat preservation progress pre-burnings, then crucible is taken out after cooled to room temperature again；
(4) it secondary ball milling: after ball-milling medium is added toward the above-mentioned mixture by pre-burning, then is loaded into ball grinder, carries out 12 h of ball milling, rotational speed of ball-mill is 200 r/min, after ball milling, mixture is placed in baking oven and is dried with 85 DEG C of temperature It is dry, then again after the sieving of the sieve of 90 mesh to get being 0.005Ho- (K to chemical composition general formula0.5Na0.5)NbO3- 0.10SrTiO3Powder；
(5) be granulated: the poly-vinyl alcohol solution that 15 wt% are added into powder obtained above is uniformly mixed, and is then placed in baking oven again In be dried with 130 DEG C of temperature, using 100 mesh sieve be sieved；
(6) tabletting: will by step (5) treated, powder is added in the mold of 1.2 cm of diameter, under the pressure of 300 MPa It is pressed into the green compact of 1.5 mm of thickness；
(7) dumping: green compact made from above-mentioned molding are placed in pallet and are covered, are then placed in Muffle furnace, in 850 DEG C of temperature 240 min of the lower heat preservation of degree carry out dumping, then again by it with furnace cooled to room temperature；
(8) it is sintered: will be placed in Muffle furnace by the green compact of step (7) processing, 4 h are sintered at 1205 DEG C, it is then naturally cold But to room temperature, it can be prepared by 0.005Ho- (K0.5Na0.5)NbO3-0.10SrTiO3Crystalline ceramics.
Performance test
By ceramics sample wear down and it is polished to 0.3 mm, surveys its light transmittance, test result shows the light transmission when wavelength is 900 nm Rate is 50%, high optical temperature sensing characteristics (in 450 K :~0.0082/K)
0.005Ho- (the K that embodiment 2 obtains0.5Na0.5)NbO3-0.10SrTiO3XRD diagram, the light transmittance of crystalline ceramics sample Sterogram, optical temperature sensing characteristics and SEM difference after figure, polishing is as shown in Figs. 1-5.Fig. 1 shows, obtained ceramics Sample is pure counterfeit cubic perovskite structure, almost without miscellaneous phase appearance；The potsherd light transmittance obtained after Fig. 2 display sintering Figure, the light transmittance of near infrared region reach 58%；Fig. 3 display polishing after ceramics sample figure, it can be seen that the light transmittance of sample and It has good uniformity；Fig. 4 shows that the sample has excellent optical temperature sensing characteristics (in 450 K :~0.0082/K)；Fig. 5 is aobvious Showing, the average grain size of the sample is tiny (~380 nm), it is evenly distributed and close to the higher Cubic structure of symmetry, Be conducive to improve light transmittance.
Embodiment 3
(1) ingredient: raw material Ho is weighed in mass ratio respectively2O3 : Na2CO3 : K2CO3 : Nb2O5 : SrCO3 : TiO2 = 0.007: 0.399: 0.52: 1: 0.061: 0.033, then it is uniformly mixed so as to obtain mixture；
(2) ball milling: adding mixture into ball-milling medium, is fitted into progress 10 h of ball milling in ball grinder, and rotational speed of ball-mill is 250 r/ Min, after ball milling, mixture is placed in baking oven and is dried with 80 DEG C of temperature, and then mixture is put into mortar again It is ground, abrasive media is ethyl alcohol, and the weight ratio of mixture and ethyl alcohol is 1:2.5；
(3) pre-burning: the mixture after above-mentioned grinding is added in crucible, after being compacted, is placed in Muffle furnace, with 5 DEG C/min Heating rate be warming up to 800 DEG C and keep the temperature 3 h carry out pre-burning, then crucible is taken out after cooled to room temperature again；
(4) it secondary ball milling: after ball-milling medium is added toward the above-mentioned mixture by pre-burning, then is loaded into ball grinder, carries out 10 h of ball milling, rotational speed of ball-mill is 250 r/min, after ball milling, mixture is placed in baking oven and is dried with 80 DEG C of temperature Dry, then again after the sieving of the sieve of 100 mesh, can be prepared by the chemical composition general formula is 0.01Ho- (K0.5Na0.5)NbO3- 0.11SrTiO3Powder；
(5) be granulated: the poly-vinyl alcohol solution that 10 wt% are added into powder obtained above is uniformly mixed, and is then placed in baking oven again In be dried with 100 DEG C of temperature, using 80 mesh sieve be sieved；
(6) tabletting: will by step (5) treated, powder is added in the mold of 1.2 cm of diameter, under the pressure of 250 MPa The green compact of 1 mm of thickness；
(7) dumping: green compact made from above-mentioned molding are placed in pallet and are covered, are then placed in Muffle furnace, in 750 DEG C of temperature 180 min of the lower heat preservation of degree carry out dumping, then again by it with furnace cooled to room temperature；
(8) it is sintered: will be placed in Muffle furnace by the green compact of step (7) processing, 3 h are sintered at 1200 DEG C, it is then naturally cold But to room temperature, it can be prepared by 0.01Ho- (K0.5Na0.5)NbO3-0.11SrTiO3Crystalline ceramics.
Performance test
By ceramics sample wear down and it is polished to 0.3 mm, surveys its light transmittance, test result shows the light transmission when wavelength is 900 nm Rate is 51%, excellent optical temperature sensing characteristics (in 450 K :~0.0091/K).
Embodiment 4
(1) ingredient: raw material Ho is weighed in mass ratio respectively2O3 : Na2CO3 : K2CO3 : Nb2O5 : SrCO3 : TiO2 = 0.004:0.399: 0.52: 1: 0.061: 0.033, then it is uniformly mixed so as to obtain mixture；
(2) ball milling: adding mixture into ball-milling medium, is fitted into progress 12 h of ball milling in ball grinder, and rotational speed of ball-mill is 280 r/ Min, after ball milling, mixture is placed in baking oven and is dried with 85 DEG C of temperature, and then mixture is put into mortar again It is ground, abrasive media is ethyl alcohol, and the weight ratio of mixture and ethyl alcohol is 1:3；
(3) pre-burning: the mixture after above-mentioned grinding is added in crucible, after being compacted, is placed in Muffle furnace, with 3.5 DEG C/ The heating rate of min, which is warming up to 850 DEG C and keeps the temperature 3 h, carries out pre-burning, then again takes out crucible after cooled to room temperature；
(4) it secondary ball milling: after ball-milling medium is added toward the above-mentioned mixture by pre-burning, then is loaded into ball grinder, carries out 12 h of ball milling, rotational speed of ball-mill is 280 r/min, after ball milling, mixture is placed in baking oven and is dried with 85 DEG C of temperature Dry, then again after the sieving of the sieve of 80 mesh, can be prepared by the chemical composition general formula is 0.005Ho- (K0.5Na0.5)NbO3- 0.11SrTiO3Powder；
(5) be granulated: the poly-vinyl alcohol solution that 12 wt% are added into powder obtained above is uniformly mixed, and is then placed in baking oven again In be dried with 120 DEG C of temperature, using 100 mesh sieve be sieved；
(6) tabletting: will by step (5) treated, powder is added in the mold of 1.2 cm of diameter, under the pressure of 300 MPa It is pressed into the green compact of 1.2 mm of thickness；
(7) dumping: green compact made from above-mentioned molding are placed in pallet and are covered, are then placed in Muffle furnace, in 750 DEG C of temperature 240 min of the lower heat preservation of degree carry out dumping, then again by it with furnace cooled to room temperature；
(8) it is sintered: will be placed in Muffle furnace by the green compact of step (7) processing, 4 h are sintered at 1225 DEG C, it is then naturally cold But to room temperature, it can be prepared by 0.005Ho- (K0.5Na0.5)NbO3-0.11SrTiO3Crystalline ceramics.
Performance test
By ceramics sample wear down and it is polished to 0.3 mm, surveys its light transmittance, test result shows the light transmission when wavelength is 900 nm Rate is 53%, high optical temperature sensing characteristics (in 450 K :~0.008/K).
Embodiment 5
(1) ingredient: raw material Ho is weighed in mass ratio respectively2O3 、Na2CO3 、K2CO3 、Nb2O5 、SrCO3And TiO2, then mix Obtain mixture；
(2) ball milling: adding mixture into ball-milling medium, is fitted into progress 8 h of ball milling in ball grinder, and rotational speed of ball-mill is 150 r/min, After ball milling, mixture is placed in baking oven and is dried with 85 DEG C of temperature, and then mixture is put into mortar again and is carried out Grinding, abrasive media are ethyl alcohol, and the weight ratio of mixture and ethyl alcohol is 1:2；
(3) pre-burning: the mixture after above-mentioned grinding is added in crucible, after being compacted, is placed in Muffle furnace, with 3 DEG C/min Heating rate be warming up to 820 DEG C and keep the temperature 2 h carry out pre-burning, then crucible is taken out after cooled to room temperature again；
(4) it secondary ball milling: after ball-milling medium is added toward the above-mentioned mixture by pre-burning, then is loaded into ball grinder, carries out 8 h of ball milling, rotational speed of ball-mill is 280 r/min, after ball milling, mixture is placed in baking oven and is dried with 85 DEG C of temperature Dry, then again after the sieving of the sieve of 100 mesh, can be prepared by the chemical composition general formula is 0.1Ho- (K0.5Na0.5)NbO3- 0.9SrTiO3Powder；
(5) be granulated: the poly-vinyl alcohol solution that 5 wt% are added into powder obtained above is uniformly mixed, and is then placed in baking oven again In be dried with 120 DEG C of temperature, using 100 mesh sieve be sieved；
(6) tabletting: will by step (5) treated, powder is added in the mold of 0.8 cm of diameter, under the pressure of 200 MPa It is pressed into the green compact of 0.8 mm of thickness；
(7) dumping: green compact made from above-mentioned molding are placed in pallet and are covered, are then placed in Muffle furnace, in 650 DEG C of temperature 120 min of the lower heat preservation of degree carry out dumping, then again by it with furnace cooled to room temperature；
(8) it is sintered: will be placed in Muffle furnace by the green compact of step (7) processing, 2 h are sintered at 1230 DEG C, it is then naturally cold But to room temperature, it can be prepared by 0.1Ho- (K0.5Na0.5)NbO3-0.9SrTiO3Crystalline ceramics.
Performance test
By ceramics sample wear down and it is polished to 0.3 mm, surveys its light transmittance, test result shows the light transmission when wavelength is 900 nm Rate is 52%, high optical temperature sensing characteristics (in 450 K :~0.0083/K).
Exemplary illustration is carried out to the embodiment of the present invention above, but the content is only preferable implementation of the invention Example, should not be considered as limiting the scope of the invention.All the changes and improvements etc. of all application ranges according to the present invention, It should all fall within the scope of the patent of the present invention.

Claims (10)

1. a kind of holmium of high optics thermometer sensor DS18B20 adulterates potassium-sodium niobate-strontium titanates crystalline ceramics preparation method, feature Be: itself the following steps are included:
(1) ingredient: by Ho2O3 、Na2CO3 、K2CO3 、Nb2O5 、SrCO3 And TiO2It is mixed, obtains mixture；
(2) ball milling: being added ball-milling medium in mixture and is fitted into progress 8~12 h of ball milling in ball grinder, will after ball milling Mixture, is then put into mortar again and grinds by mixture drying；
(3) pre-burning: the mixture after grinding is added in crucible, after being compacted, is placed in Muffle furnace, is warming up to 800~850 DEG C and keep the temperature 2~4 h carry out pre-burning, then crucible is taken out after cooled to room temperature again；
(4) it secondary ball milling: toward after ball-milling medium is added in the mixture of pre-burning, then is loaded into ball grinder, carries out ball 8~12 h are ground, after ball milling, mixture is dried, then again after sieve is sieved, obtains powder；
(5) be granulated: the poly-vinyl alcohol solution that 5~15 wt% are added toward powder is uniformly mixed, and is then placed in drying in baking oven again, then It is sieved through sieve, obtains softwood；
(6) tabletting: softwood is added in mold, depresses to the green compact of 0.8~1.5 mm of thickness in the pressure of 200~300 MPa；
(7) dumping: being placed in green compact in pallet and cover, be then placed in Muffle furnace, 650~850 DEG C at a temperature of keep the temperature 120~240 min carry out dumping, then again by it with furnace cooled to room temperature；
(8) it is sintered: will be placed in Muffle furnace by the green compact of step (7) processing, 2~4 h are sintered at 1200~1230 DEG C, so Cooled to room temperature adulterates potassium-sodium niobate-strontium titanates crystalline ceramics to get to holmium afterwards.
2. a kind of holmium of high optics thermometer sensor DS18B20 as described in claim 1 adulterates potassium-sodium niobate-strontium titanates crystalline ceramics Preparation method, it is characterised in that: in step (1) each component by following mass ratio carry out charge ratio, Ho2O3 : Na2CO3 : K2CO3 : Nb2O5 : SrCO3 : TiO2 =0.004~0.007: 0.399: 0.52: 1: 0.05~0.061: 0.027~0.033.
3. a kind of holmium of high optics thermometer sensor DS18B20 as described in claim 1 adulterates potassium-sodium niobate-strontium titanates crystalline ceramics Preparation method, it is characterised in that: in step (2), abrasive media is ethyl alcohol, and the mass ratio of the mixture and ethyl alcohol is 1:2 ~1:3.
4. a kind of holmium of high optics thermometer sensor DS18B20 as described in claim 1 adulterates potassium-sodium niobate-strontium titanates crystalline ceramics Preparation method, it is characterised in that: in step (2) and (4), rotational speed of ball-mill be 150~280 r/min.
5. a kind of holmium of high optics thermometer sensor DS18B20 as described in claim 1 adulterates potassium-sodium niobate-strontium titanates crystalline ceramics Preparation method, it is characterised in that: in step (3), in the temperature-rise period of pre-burning heating rate be 3~5 DEG C/min.
6. a kind of holmium of high optics thermometer sensor DS18B20 as described in claim 1 adulterates potassium-sodium niobate-strontium titanates crystalline ceramics Preparation method, it is characterised in that: in step (2) and (4), drying temperature be 80~85 DEG C.
7. a kind of holmium of high optics thermometer sensor DS18B20 as described in claim 1 adulterates potassium-sodium niobate-strontium titanates crystalline ceramics Preparation method, it is characterised in that: the powder obtained in step (4), chemical composition general formula be yHo- (K0.5Na0.5) NbO3-xSrTiO3。
8. a kind of holmium of high optics thermometer sensor DS18B20 as claimed in claim 7 adulterates potassium-sodium niobate-strontium titanates crystalline ceramics Preparation method, it is characterised in that: the range of the x be 0.09~0.11, the y be 0.005 or 0.01.
9. a kind of holmium of high optics thermometer sensor DS18B20 as described in claim 1 adulterates potassium-sodium niobate-strontium titanates crystalline ceramics Preparation method, it is characterised in that: in step (4) and (5), the aperture of the sieve is 80~100 mesh.
10. a kind of holmium of high optics thermometer sensor DS18B20 as described in claim 1 adulterates potassium-sodium niobate-strontium titanates crystalline ceramics Preparation method, it is characterised in that: in step (5), in the powder be added polyvinyl alcohol after, be placed in baking oven with 90~130 DEG C temperature be dried.
CN201811375592.XA 2018-11-19 2018-11-19 A kind of holmium doping potassium-sodium niobate-strontium titanates crystalline ceramics preparation method of high optics thermometer sensor DS18B20 Pending CN109251030A (en)

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