SU351476A1 - YESESOYUZNAZ ^ • Ci ^ V "i ^ _YY.Y; •!; ^ • r- • F ^ L ^ i: nATEJiiyu-IiJ •••" lBIBIIOTEKD - Google Patents

YESESOYUZNAZ ^ • Ci ^ V "i ^ _YY.Y; •!; ^ • r- • F ^ L ^ i: nATEJiiyu-IiJ •••" lBIBIIOTEKD

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SU351476A1
SU351476A1 SU1606161A SU1606161A SU351476A1 SU 351476 A1 SU351476 A1 SU 351476A1 SU 1606161 A SU1606161 A SU 1606161A SU 1606161 A SU1606161 A SU 1606161A SU 351476 A1 SU351476 A1 SU 351476A1
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USSR - Soviet Union
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yesesoyuznaz
natejiiyu
lbibiiotekd
iij
temperature
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SU1606161A
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Russian (ru)
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SU390174A1 (en
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М. Дашевский Л. Н. Черноусов Т. М. Ерусалимска Н. В. Коломоец
Л. А. Осипова
Publication of SU351476A1 publication Critical patent/SU351476A1/en
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Priority to SU1606161A priority Critical patent/SU390174A1/en
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Изобретение относитс  к области термоэлектрического способа преобразовани  энергии.The invention relates to the field of thermoelectric energy conversion.

Один из примен емых материалов в термоэлектричестве - 5Ь2Тёз, который  вл етс  матрицей твердого раствора дл  низкотемпературного материала р-типа.One of the materials used in thermoelectricity is 5L2, which is a solid solution matrix for a p-type low-temperature material.

Известны различные способы получени  дапного соедиьени . Одним из них  вл етс  синтез соединени  SbgTes путем пр мого сплавлени  компонент в соотношении, отвечающем стехиометрическому составу. Однако по такому способу получают соединение не стехиометрического состава, а с большнм избыпсом сурьмы. Сурьма, раствор  сь в соединении и  вл  сь акцепторной примесью , обусловливает р-тип проводи.мости с концентрацией 1020-102 /см, котора  превышает оптимальную с точки зрени  термоэлектрической эффективиости дл  любого предполагаемого рабочего иитервала температур .Various methods for the preparation of dap compounds are known. One of them is the synthesis of the SbgTes compound by direct fusion of the components in a ratio corresponding to the stoichiometric composition. However, by this method, the compound is obtained not with a stoichiometric composition, but with a large excess of antimony. Antimony, dissolving in the compound and being an acceptor impurity, determines the p-type conductivity with a concentration of 1020-102 / cm, which exceeds the optimum from the point of view of thermoelectric efficiency for any intended working temperature range.

Эффективность термоэлектрического материала определ етс  параметром Z - . Полученные таким способом соединеви  ЗЬаТез имеют при комнатной температуре следуюш,ие параметры: « 80 а ЗОООол1-сл -1; ,3-10- 1град. По предлагаемому способу, с целью увеличени  термоэлектрической добротности, ни подложку, например, из слюды, подогретую до температуры 150-300°С, одним из способов, например испарением в вакууме, направл ютThe efficiency of the thermoelectric material is determined by the parameter Z -. The compounds obtained by this method have the following, at room temperature, parameters: “80 a ZOOOol1-sl -1; 3-10-1grad. In the proposed method, in order to increase the thermoelectric figure of merit, the substrate, for example, from mica, heated to a temperature of 150-300 ° C, one of the methods, for example by evaporation in vacuum, directs

пучок атомов либо молекул с превышением содержани  теллура над сте.х-иометрическнм составом ЗЬоТез до 20 ат. %. На подложке происходнт синтез соединени  ЗЬзТез. Избыточный теллур, конденсиру сь на нодложке,a beam of atoms or molecules with an excess of the tellurium content over the X-iometric composition of the BROTZ to 20 at. % On the substrate, synthesis of the compound is performed. Redundant tellurium, condensate on the pad,

частично раствор етс  в соединенни 5Ь2Тез и частично вынадает во вторую фазу.partially dissolves in the 5B2 compound and partially discharges into the second phase.

Дл  увеличени  однородности состава ИЛ1; дл  получени  заданной концентрации носителей полученный материал подвергают гемогенизируюш ,ему отжигу в атмосфере аргоиа ( атм) при температуре 150-300 С. Затем провод т кратковременную (3-5 мин) отгонку непрореагнровавшего теллура в вакууме . При этом чем ниже температура отжпга из указанного интервала темиератур, тем ниже равновесна  концентраци  носителей.To increase the uniformity of the composition of IL1; to obtain a given carrier concentration, the resulting material is subjected to hemogenization, annealed in argon atmosphere (atm) at a temperature of 150-300 ° C. Then, short-term (3-5 min) distillation of unreacted tellurium in vacuum is carried out. In this case, the lower the temperature of an otgging from the specified interval of temperature, the lower the equilibrium concentration of the carriers.

При концентрации носителей 1-2-10 1,/с.« в образцах получают максимальную величину термо-э.д.с., равную 200 мкв./град и характернстику добротностн ,8-, /град. 3 путем синтеза с последующим отжигом, отличающийс  тем, что, с целью увеличени  термоэлектрической добротности, исходный матери л испар ют, конденсируют на подложке при 4 температуре 150-300°С и отжигают в атмосфере аргона при температуре 150-300°С, а непрореагировавший теллур испар ют в вакууме .When the concentration of carriers 1-2-10 1, / s. "In the samples get the maximum value of thermo-emf., Equal to 200 µv. / Deg and the characteristic of good quality, 8- / deg. 3 by synthesis with subsequent annealing, characterized in that, in order to increase thermoelectric figure of merit, the source material is evaporated, condensed on a substrate at 4 temperatures of 150-300 ° C and annealed in an atmosphere of argon at a temperature of 150-300 ° C, and unreacted the tellurium is evaporated in a vacuum.

SU1606161A 1970-12-30 1970-12-30 METHOD OF PREPARATION OF COPPER-NICKEL FINE STEEL TO FLOTATION SEPARATION SU390174A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141778A (en) * 1976-02-12 1979-02-27 Domrachev Georgy A Method of preparing crystalline compounds AIVA BVIA

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141778A (en) * 1976-02-12 1979-02-27 Domrachev Georgy A Method of preparing crystalline compounds AIVA BVIA

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