PATENT CLAIM ANALYSIS

Application Number: 15936442
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-08
Patent Classification: ["423", "409000"]

Abstract:
The present invention discloses CrN thermoelectric material and its preparation method, which belongs to the field of thermoelectric materials. Here, we provide a study for thermoelectric properties, hardness, wear-resisting performance and thermal stability of CrN. These results show that CrN possesses excellent mechanical properties and thermal stability. The hardness of the bulk CrN sample is as high as 735.76 HV, which is far superior to most of thermoelectric materials. The thermogravimetric analysis test indicates that CrN remain stable at 873 K. Friction and wear test results demonstrate that the low friction coefficient (˜0.42) and good wear resistance of CrN. The maximum ZT value of 0.104 is observed at 848 K. In this way, CrN may be a promising thermoelectric material in extreme environment application which requires both mechanical and thermoelectric properties. Such as collision avoidance systems and outerspace.

Claim (Index 2):
A method for preparing a CrN thermoelectric material, comprising steps of:\n Step 1: dissolving Cr(NO 3 ) 3 \u00b79H 2 O (99.9%, aladdin) and PEG10000 (99%, aladdin) in deionized water and adding an obtained solution drop wise with NH 3 \u00b7H 2 O under a magnetic stirrer, wherein the solution slowly turned dark green, indicating the formation of Cr(OH) 3  precursor; separating an obtained product from the solution by filtering and washing with alcohol and deionized water several times, and drying in a vacuum; Step 2: calcining dried powder Cr(OH) 3  in a CVD tubular furnace to obtain Cr 2 O 3  powder; Step 3: nitriding the obtained Cr 2 O 3  powder by passing ammonia gas into the CVD tube furnace to obtain black powder CrN; and Step 4: loading the obtained black powder CrN into graphite dies, wherein a bulk CrN sample is prepared by a homemade hot-pressing machine.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 90.0
- Lexical Diversity: 1.66304
- Patent Class: 423.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15025732', '14142863', '15033308', '13611177', '13724403']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.70063346083257
- 35 USC 102 Novelty (BERT): 0.5015692240642892
- Combined Prediction Score: 0.6807270371557419
- Mean Citation Score: 145.262652
- Max Citation Score: 157.52966
- Similarity Product: 93.770724233979

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test