Koh Takahashi

Technova Inc

We have studied the so-called AHE (anomalous heat effect) by calorimetry of our C-system 1). The C-system was designed to make accurate detection of excess thermal power larger than several W/kg-sample. By our latest data with significant increase of excess thermal power of the MHE (nano-metal hydrogen energy) experiment, we have met to needs for i...

In this ICCF23 talk, we review our R&D works on nano-metal hydrogen energy (MHE) in 2018-2020, after the 2015-2017 NEDO-MHE Project [1, 2]. Major issues that we have obtained [3, 4, 5, 6] are as follows: 1) Hydrogen Gas Loading Method using Nano-Metal Composite powders (Ni based binary nano-islands) at elevated temperature has provided reproducible...

Collaborative research among Technova Inc., (continued from the title page) calorimetry system was developed at Tohoku University to replicate anomalous heat generation experiments reported by Technova and the Kobe Univ. Group. In this paper, we present evidence of anomalous excess heat effects obtained from experiments at our laboratory at Tohoku...

Repeatability of anomalous heat effect (AHE) by the interaction of nano-composite PNZ6 (Pd1Ni10/zirconia) sample and D-gas at ca. 300°C RC (reaction chamber) condition was studied by making repeated calcination of sample after D-charging experimental runs. D-loading ratios (D/Ni) at room temperature changed as 3.5, 0.8 and 0.08 for the first, secon...

We have been studying anomalous heat effect (AHE) by the interaction of nano-composite CNZ (Cu1Ni7/zirconia) sample and H-gas at 200-300°C RC (reaction chamber) condition. In this paper, we report a large heat burst (ca. 130 W peak by oil-flow calorimetry) event by CNZ7 sample (ca. 1kg, Cu1Ni7/Zirconia) and H-gas interaction under elevated temperat...

Repeatability of anomalous heat effect (AHE) by the interaction of nano-composite PNZ6 (Pd1Ni10/zirconia) sample and D-gas at ca. 300°C RC (reaction chamber) condition was studied by making repeated calcination of sample after D-charging experimental runs. D-loading ratios (D/Ni) at room temperature changed as 3.5, 0.8 and 0.08 for the first, secon...

We have been studying anomalous heat effect (AHE) by the interaction of nano-composite CNZ (Cu1Ni7/zirconia) sample and H-gas at 200-300°C RC (reaction chamber) condition. In this paper, we report a large heat burst (ca. 130 W peak by oil-flow calorimetry) event by CNZ7 sample (ca. 1kg, Cu1Ni7/Zirconia) and H-gas interaction under elevated temperat...

Synchrotron Radiation XRD and XAFS analyses were performed for PNZ6 sample in which anomalous heat effect (AHE) was observed remarkably in a series of collaborative studies performed by 6 parties to which present authors belong. Structural changes of PNZ6 with increasing temperature up to 600℃ under hydrogen atmosphere were revealed. In the as-synt...

Repeatability of anomalous heat effect (AHE) by the interaction of nano-composite CNZ (Cu1Ni7/zirconia) sample 1,2, and H-gas at 200-300 degree C RC (reaction chamber) condition was studied. In this paper, we report a large heat burst (ca. 100 W peak level) event by CNZ7 sample (ca. 1kg, Cu1Ni7/Zirconia) and H-gas interaction under elevated tempera...

Repeatability of anomalous heat effect (AHE) by the interaction of nano-composite PNZ6 (Pd1Ni10/zirconia) sample 1,2 and D-gas at ca. 300 degree C RC (reaction chamber) condition was studied by making repeated calcination of sample after D-charging experimental runs. D-loading ratios (D/Ni) at room temperature changed as 3.5, 0.8 and 0.08 for the v...

Presentation file to be presented at the upcoming JCF19 Meeting, JCFRS, Iwate University, Nov.9-10 2018. Anomalous heat effect by nano-metal composite PNZ6 sample was studied by using repeated calcination treatment and D-gas charging at elevated temperature. 10W level excess thermal power sustaining for several weeks is observed repeatably for the...

This presentation reports new experimental finding of anomalously large heat burst (ca. 3 kW for 100s) event by H-gas charging with Cu-Ni/zirconia nano-composite powder, at elevated temperature. The nano-powder does not use precious metal as Pd, and high thermal power generation by light-hydrogen (H-gas) seems realistic. We expect, it will be a bre...

Anomalous heat effect by interaction of hydrogen isotope gas and nanoparticles supported by zirconia, PdNi 10 /ZrO 2 ("PNZ6" and "PNZ6r") and PdNi 7 /ZrO 2 ("PNZ7k"), has been examined. Excess power of 3 ~ 24 W from PNZ6 at elevated temperature of 200 ~ 300 °C continued for several weeks. The PNZ6 and PNZ6r samples with Pd/Ni=1/10 generated much hi...

This poster presentation is made by Technova Inc., on behalf of 6 parties (Technova Inc., Tohoku University, Nissan Motors, Kyushu University, Nagoya University and Kobe University). Researchers are Akito Takahashi, Koh Takahashi, Reiko Seto, Takeshi Hatano,Yasuhiro Iwamura, Takehiko Itoh, Jirohta Kasagi, Masanori Nakamura, Masanobu Uchimura, Hidek...

Anomalous heat effect by interaction of hydrogen isotope gas and metal nanocomposites supported by zirconia or by silica has been examined. Observed absorption and heat evolution at RT were not too large to be explained by some chemical processes. At elevated temperatures of 200 ~ 300C, most samples with binary metal nanocomposites produced excess...

This is the presentation file of T. Hioki et al work on material analysis of PNZ6 sample which showed significant AHE with long lasting and high power level excess thermal power, presented at ICCF21 Conference, June 3-8 2018 at Colorado State University, USA. The work was mainly done by a team of Nagoya University as a portion of the final report o...

This is ppt presentation by Yasuhiro Iwamura et at ICCF21 Conference, June 3-8, 2018, Colorado State University, USA. The content reflects AHE results and related observations mainly obtained at Tohoku University. It is a portion of the final report to the NEDO-MHE project Phenomenology and Controllability of New Exothermic Reaction between Metal a...

Presentation file of A. Takahashi et al at ICCF21, June 3-8, 2018, Colorado State University, USA is uploaded. The content of the presentation corresponds to our Technical Report on NEDO-MHE project Phenomenology and Controllability of New Exothermic Reaction between Metal and Hydrogen.

Anomalous heat effect by interaction of hydrogen isotope gas and nanoparticles supported by zirconia, PdNi10/ZrO2 ("PNZ6" and "PNZ6r") and PdNi7/ZrO2 ("PNZ7k"), has been examined. Excess power of 3 ~ 24 W from PNZ6 at elevated temperature of 200 ~ 300 °C continued for several weeks. The PNZ6 and PNZ6r samples with Pd/Ni=1/10 generated much higher e...

Presentation slides at JCF18 Meeting, 24-25 November 2017, Sendai Japan. Hydrogen isotope absorption by palladium and nickel-based nanocomposite samples has been examined as a collaborative work using the experimental apparatuses installed at Kobe University and Tohoku University in order to share scientific understanding of the anomalous heat effe...

Hydrogen isotope absorption characteristics of nanoparticles supported by silica, Pd/SiO2 ("PSf1") and CuNi10/SiO2 ("CNS3"), have been examined. Large absorption energy (1.3±0.3 eV/Pd) with large apparent loading ratio (LM = 2.6) was observed in the initial phase of the D-PSf1#1 run with D2 at room temperature, which could be ascribed to reduction...

Hydrogen isotope absorption characteristics of nanoparticles supported by silica, Pd/SiO2 ("PSf1") and CuNi10/SiO2 ("CNS3"), have been examined. Large absorption energy (1.30.3 eV/Pd) with large apparent loading ratio (LM = 2.6) was observed in the initial phase of the D-PSf1#1 run with D2 at room temperature, which could be ascribed to reduction...

We built a new experimental system to replicate and measure precisely the anomalous heat generation experiments reported by A. Kitamura and A. Takahashi et al [1]-[3]. A liquid hydrocarbon coolant enables us to use the flow-calorimetry method at temperatures higher than 373K. This system is based on the paper [1], but improved in regard to the numb...

Hydrogen isotope absorption by nickel-based binary nanocomposite samples has been examined in collaborative work in the new NEDO MHE project. The samples tested so far include Pd0.044Ni0.31Zr0.65 ("PNZ3" and re-calcined "PNZ3r") and Cu0.044Ni0.31Zr0.65 ("CNZ5"). Material characterization by XRD and STEM/EDS has revealed the (continued in next page)...

We built a new experimental system to replicate the anomalous heat generation experiments based on the papers by A. Kitamura and A. Takahashi. The system was developed in order to measure precisely heat generation using a flow-calorimetry method with liquid hydrocarbon coolant that enables us to measure at temperatures higher than 373 K. The Ni-bas...

Presentation slide for 12th International Workshop on Anomalies in Hydrogen Loaded Metals, June 5-9, 2-17, Costigliole d’Asti, Italy, which was uploaded on the ISCMNS Workshop site on June 4 2017.

Presented at 12th International Workshop on Anomalies in Hydrogen Loaded Metals, June 5-9, 2017, Costigliole d’Asti, Italy

Project Aim: to verify the existence of new exothermic reaction between nano-metals and hydrogen which will be applicable for future new clean energy source, and to study the controllability of generated thermal energy. In the following, brief summary of implementation and results by MHE-group Japan is described in designated R&D issues for two yea...

We have reported the replication experiments of anomalous heat effect with D( or H) gas loading to Ni-based nano-composite metal samples, using a newly installed metal-hydrogen-energy apparatus system (MHE facility) at ELPH Tohoku University. First results obtained in 2016 July-August are presented.

Presentation slide at ICCF20 Conference

] Brief review of Technova-Kobe study (2008-2015) on anomalous heat effects (AHE) by interaction of nano-metals and D(H)-gas is presented in three parts. Part-I) D(H) isotopic effect by twin gas loading and calorimetry at room temperature is reviewed. Part-II) AHE by interaction of binary Ni-based nano-metals and H(D)-gas at 200-300 deg C is review...

] We built a new experimental system to replicate the anomalous heat generation experiments reported by A. Kitamura and A. Takahashi et al [1]-[5]. The system was developed in order to measure precisely heat generation using a flow-calorimetry method when hydrogen isotope gas, up to 1.0MPa, is loaded into Ni-based binary nano-composites. The loadin...

] Hydrogen isotope absorption by nickel-based binary nanocomposite samples has been examined as a collaborative work of NEDO new MHE project. The samples tested so far include Pd0.044Ni0.31Zr0.65 (" PNZ3 " and re-calcined " PNZ3r ") and Cu0.044Ni0.31Zr0.65 (" CNZ5 "). Material characterization by XRD and STEM/EDS has revealed the existence of cryst...

Two lithium manganese oxides, Li1.03Mn1.96O4, with different surface areas of 3.55 and 0.68 m2/g were prepared and their electrochemical properties were studied as positive electrodes for lithium ion batteries. Cycle performance tests gave capacity losses of 9 and 18% at 25 °C, and 28 and 33% at 55 °C for the samples with larger and smaller surface...

as 4.7 V-class cathode materials were prepared with our self-reaction method at 650, 700, and 750°C calcination temperatures respectively, and their electrochemical properties and crystal structures were studied. The sample at 700°C was assigned to the space group in the X-ray diffraction analysis. On the contrary, the space group of the sample c...

We have used a self-reaction process, called the JMC (Japanese Metal and Chemical Co., Ltd.) method, to prepare a series of defect spinels Li8n/n+4Mn8/n+4O4, Li4Mn5O12-delta (n = 0 8), Li2Mn3O7-delta (n = 0.65), and Li2Mn4O9-delta (n = 0.5). We found that it is easy to oxidize a defect spinel with a higher lithium content (Li/Mn ratio of 0.8) durin...

At the B1-to-B2 phase transition of BaS induced under pressure, the preferred orientation relationship, (A) (100)B1{//}(111)B2 and (B) (111)B1{//}(100)B2, holds as in the case of alkali halides. With an additional uniaxial compression, another type of relationship, (A) (100)B1{//}(111)B2 and (C) (010)B1{//}(\bar{1}01)B2, holds, where the uniaxial c...

The NH4CdCl3 structure is a high-pressure form for some complex sulphides. Sr(Ti1−xZrx)S3, a mixture of hexagonal SrTiS3 (BaNiO3 structure) and orthorhombic SrZrS3 (GdFeO3 structure) at the ambient pressure, transforms to the orthorhombic NH4CdCl3 structure by heating at 1000°C under a pressure of 60 kbar. The NH4CdCl3 structure is also a high-pres...

With specimens of Y1-xCa1.1 xBa2-0.1 xCu3Oy prepared under the same conditions, Y0.95Ca0.055Ba1.995Cu3Oy possessed a larger superconducting critical current density Jc than the nondoped YBa2Cu3Oy. The Jc of the former composition was 275 A/cm2 at 77 K, whereas it was 145 A/cm2 with the latter stoichiometric composition.

A crystallographic study was done in the Nd2CuO4-Sr2CuO3 system. Five phases were found in this system; A: Nd2CuO4, B: Nd2SrCu2O6, C: (Nd0.45Sr0.55)3Cu2O6-y, D: (Nd1-xSrx)2CuO4-y, and E: Sr2CuO3. Phases B and C possess Sr3Ti2O7-type structures, and phase D has the same structure as La2CuO4. No superconductivity was observed in any of the above-ment...

The Y-Ca solid solution of the ``1-2-3'' crystal structure with composition Y1-xCa1.1xBa2-0.1xCu3Oy (0

Superconducting transition temperatures were measured under pressure for the Bi-Sr-Ca-Cu-O system. The transition temperature near 80 K (Tc1) slightly increases with pressure: dTc1/dp = 0.06 K/GPa (onset), while Tc near 110 K (Tc2) decreases with pressure: dTc2/dp = 0.2 K/GPa (onset) and -0.3 K/GPa (complete). The negative pressure-dependence was d...

One of the high-Tc superconducting phases in Bi-Sr-Ca-Cu oxides has been found to be Bi4Sr3Ca2Cu4O(y) with a pseudotetragonal structure, which belongs to the family of complex bismuth oxides with layered structures. The superconducting transition takes place at 80 K (midpoint), with a long tail of residual resistance down to 20 K. A partial drop of...

The Pr-Y solid-solution of the “1-2-3” crystal structure is expressed as (PrxY1-x)1+δBa2-δCu3Oy, with δ ranging from 0 (x{=}0) to 0.06 (x{=}1); a small percentage of the Ba sites are occupied by Pr ions. This Pr-Y solid-solution for x>0.5 is nonsuperconducting and does not show metallic conduction. At the metal-semiconductor boundary (x{=}0.5), the...

The Pr-Y solid-solution of the '1-2-3' crystal structure is expressed as (Pr//xY//1// minus //x)//1// plus // delta Ba//2// minus // delta Cu//3O//y, with delta ranging from 0 (x equals 0) to 0. 06 (x equals 1); a small percentage of the Ba sites are occupied by Pr ions. This Pr-Y solid-solution for x greater than 0. 5 is nonsuperconducting and doe...

A new compound, PrBa//2Cu//3O//y, which is isomorphic with YBa//2Cu//3O//y, was prepared as single phase. With specimens quenched from 920 degree C, the oxygen content y was 6. 8 plus or minus 0. 1 and the ratio of Pr**3** plus to Pr**4** plus was 0. 4:0. 6. With furnace-cooled specimens, the value of y was 7. 1 plus or minus 0. 1 and the ratio bec...

High Tc superconductors of monophase, Ba2YCu3O8-x, and mixed phase samples were prepared from mixtures with Ba/Y/Cu ratios of 2/1/3 and 2/1/3.5, respectively. They were investigated by dc electrical measurements and X-ray diffraction. All samples have basically an orthogonal structure. The zero-resistivity temperatures for the monophase and mixed p...

Superconducting transition temperatures were measured under pressure for Y0.4Ba0.6CuOy specimens. The onset temperature Tco increases with the increase of pressure at the rate of 0.45 deg/GPa, whereas the behavior of complete temperature Tcf is more complicated; at first it increases and then above 10 GPa it decreases. Residual resistance remained...